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CVE-2026-4692 (GCVE-0-2026-4692)
Vulnerability from cvelistv5 – Published: 2026-03-24 12:30 – Updated: 2026-04-13 13:48
VLAI?
EPSS
Title
Sandbox escape in the Responsive Design Mode component
Summary
Sandbox escape in the Responsive Design Mode component. This vulnerability was fixed in Firefox 149, Firefox ESR 115.34, Firefox ESR 140.9, Thunderbird 149, and Thunderbird 140.9.
Severity ?
9.6 (Critical)
Assigner
References
Impacted products
| Vendor | Product | Version | |||||||
|---|---|---|---|---|---|---|---|---|---|
| Mozilla | Firefox |
Unaffected:
115.34 , ≤ 115.*
(rpm)
Unaffected: 140.9 , ≤ 140.* (rpm) Unaffected: 149 , ≤ * (rpm) |
|||||||
|
|||||||||
Credits
Tom Ritter
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RHSA-2026:7858
Vulnerability from csaf_redhat - Published: 2026-04-13 12:47 - Updated: 2026-04-28 18:40Summary
Red Hat Security Advisory: firefox security update
Severity
Important
Notes
Topic: An update for firefox is now available for Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support and Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On.
Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.
Details: Mozilla Firefox is an open-source web browser, designed for standards compliance, performance, and portability.
Security Fix(es):
* firefox: thunderbird: Use-after-free in the JavaScript Engine component (CVE-2026-4701)
* firefox: thunderbird: Memory safety bugs fixed in Firefox ESR 115.34, Firefox ESR 140.9, Thunderbird ESR 140.9, Firefox 149 and Thunderbird 149 (CVE-2026-4721)
* firefox: thunderbird: Privilege escalation in the Netmonitor component (CVE-2026-4717)
* firefox: thunderbird: Sandbox escape due to use-after-free in the Disability Access APIs component (CVE-2026-4688)
* firefox: thunderbird: Incorrect boundary conditions in the Graphics: Canvas2D component (CVE-2026-4706)
* firefox: thunderbird: Incorrect boundary conditions in the Audio/Video: Web Codecs component (CVE-2026-4695)
* firefox: thunderbird: Sandbox escape due to incorrect boundary conditions, integer overflow in the XPCOM component (CVE-2026-4689)
* firefox: thunderbird: JIT miscompilation in the JavaScript Engine: JIT component (CVE-2026-4698)
* firefox: thunderbird: Incorrect boundary conditions, uninitialized memory in the JavaScript Engine component (CVE-2026-4716)
* firefox: thunderbird: Race condition, use-after-free in the Graphics: WebRender component (CVE-2026-4684)
* firefox: thunderbird: Undefined behavior in the WebRTC: Signaling component (CVE-2026-4705)
* firefox: thunderbird: Uninitialized memory in the Graphics: Canvas2D component (CVE-2026-4715)
* firefox: thunderbird: Incorrect boundary conditions in the Graphics: Canvas2D component (CVE-2026-4685)
* firefox: thunderbird: Incorrect boundary conditions in the Audio/Video component (CVE-2026-4714)
* firefox: thunderbird: Incorrect boundary conditions in the Audio/Video: GMP component (CVE-2026-4709)
* firefox: thunderbird: Incorrect boundary conditions in the Audio/Video component (CVE-2026-4710)
* firefox: thunderbird: Information disclosure in the Widget: Cocoa component (CVE-2026-4712)
* firefox: thunderbird: Incorrect boundary conditions in the Audio/Video: Web Codecs component (CVE-2026-4697)
* firefox: thunderbird: Incorrect boundary conditions in the Graphics component (CVE-2026-4713)
* firefox: thunderbird: Sandbox escape due to incorrect boundary conditions, integer overflow in the XPCOM component (CVE-2026-4690)
* firefox: thunderbird: Use-after-free in the Widget: Cocoa component (CVE-2026-4711)
* firefox: thunderbird: Incorrect boundary conditions in the Graphics: Canvas2D component (CVE-2026-4686)
* firefox: thunderbird: Incorrect boundary conditions in the Graphics component (CVE-2026-4708)
* firefox: thunderbird: Use-after-free in the CSS Parsing and Computation component (CVE-2026-4691)
* firefox: thunderbird: Incorrect boundary conditions in the Layout: Text and Fonts component (CVE-2026-4699)
* firefox: thunderbird: Use-after-free in the Layout: Text and Fonts component (CVE-2026-4696)
* firefox: thunderbird: Incorrect boundary conditions in the Audio/Video: Playback component (CVE-2026-4693)
* firefox: thunderbird: Undefined behavior in the WebRTC: Signaling component (CVE-2026-4718)
* firefox: thunderbird: JIT miscompilation in the JavaScript Engine component (CVE-2026-4702)
* firefox: thunderbird: Incorrect boundary conditions in the Graphics: Text component (CVE-2026-4719)
* firefox: thunderbird: Incorrect boundary conditions, integer overflow in the Graphics component (CVE-2026-4694)
* firefox: thunderbird: Sandbox escape in the Responsive Design Mode component (CVE-2026-4692)
* firefox: thunderbird: Memory safety bugs fixed in Firefox ESR 140.9, Thunderbird ESR 140.9, Firefox 149 and Thunderbird 149 (CVE-2026-4720)
* firefox: thunderbird: Mitigation bypass in the Networking: HTTP component (CVE-2026-4700)
* firefox: thunderbird: Incorrect boundary conditions in the Graphics: Canvas2D component (CVE-2026-4707)
* firefox: thunderbird: Denial-of-service in the WebRTC: Signaling component (CVE-2026-4704)
* firefox: thunderbird: Sandbox escape due to incorrect boundary conditions in the Telemetry component (CVE-2026-4687)
For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.
Terms of Use: This content is licensed under the Creative Commons Attribution 4.0 International License (https://creativecommons.org/licenses/by/4.0/). If you distribute this content, or a modified version of it, you must provide attribution to Red Hat Inc. and provide a link to the original.
A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: Race condition, use-after-free in the Graphics: WebRender component
7.5 (High)
Vendor Fix
For details on how to apply this update, which includes the changes described in this advisory, refer to:
https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2026:7858
Product status
Fixed
AppStream-8.4.0.Z.AUS:firefox-0:140.9.0-1.el8_4.src
AppStream-8.4.0.Z.AUS:firefox-0:140.9.0-1.el8_4.x86_64
AppStream-8.4.0.Z.AUS:firefox-debuginfo-0:140.9.0-1.el8_4.x86_64
AppStream-8.4.0.Z.AUS:firefox-debugsource-0:140.9.0-1.el8_4.x86_64
AppStream-8.4.0.Z.EUS.EXTENSION:firefox-0:140.9.0-1.el8_4.src
AppStream-8.4.0.Z.EUS.EXTENSION:firefox-0:140.9.0-1.el8_4.x86_64
AppStream-8.4.0.Z.EUS.EXTENSION:firefox-debuginfo-0:140.9.0-1.el8_4.x86_64
AppStream-8.4.0.Z.EUS.EXTENSION:firefox-debugsource-0:140.9.0-1.el8_4.x86_64
Threats
Impact
Important
A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: Incorrect boundary conditions in the Graphics: Canvas2D component
7.5 (High)
Vendor Fix
For details on how to apply this update, which includes the changes described in this advisory, refer to:
https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2026:7858
Product status
Fixed
AppStream-8.4.0.Z.AUS:firefox-0:140.9.0-1.el8_4.src
AppStream-8.4.0.Z.AUS:firefox-0:140.9.0-1.el8_4.x86_64
AppStream-8.4.0.Z.AUS:firefox-debuginfo-0:140.9.0-1.el8_4.x86_64
AppStream-8.4.0.Z.AUS:firefox-debugsource-0:140.9.0-1.el8_4.x86_64
AppStream-8.4.0.Z.EUS.EXTENSION:firefox-0:140.9.0-1.el8_4.src
AppStream-8.4.0.Z.EUS.EXTENSION:firefox-0:140.9.0-1.el8_4.x86_64
AppStream-8.4.0.Z.EUS.EXTENSION:firefox-debuginfo-0:140.9.0-1.el8_4.x86_64
AppStream-8.4.0.Z.EUS.EXTENSION:firefox-debugsource-0:140.9.0-1.el8_4.x86_64
Threats
Impact
Important
A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: Incorrect boundary conditions in the Graphics: Canvas2D component
7.5 (High)
Vendor Fix
For details on how to apply this update, which includes the changes described in this advisory, refer to:
https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2026:7858
Product status
Fixed
AppStream-8.4.0.Z.AUS:firefox-0:140.9.0-1.el8_4.src
AppStream-8.4.0.Z.AUS:firefox-0:140.9.0-1.el8_4.x86_64
AppStream-8.4.0.Z.AUS:firefox-debuginfo-0:140.9.0-1.el8_4.x86_64
AppStream-8.4.0.Z.AUS:firefox-debugsource-0:140.9.0-1.el8_4.x86_64
AppStream-8.4.0.Z.EUS.EXTENSION:firefox-0:140.9.0-1.el8_4.src
AppStream-8.4.0.Z.EUS.EXTENSION:firefox-0:140.9.0-1.el8_4.x86_64
AppStream-8.4.0.Z.EUS.EXTENSION:firefox-debuginfo-0:140.9.0-1.el8_4.x86_64
AppStream-8.4.0.Z.EUS.EXTENSION:firefox-debugsource-0:140.9.0-1.el8_4.x86_64
Threats
Impact
Important
A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: Sandbox escape due to incorrect boundary conditions in the Telemetry component
7.5 (High)
Vendor Fix
For details on how to apply this update, which includes the changes described in this advisory, refer to:
https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2026:7858
Product status
Fixed
AppStream-8.4.0.Z.AUS:firefox-0:140.9.0-1.el8_4.src
AppStream-8.4.0.Z.AUS:firefox-0:140.9.0-1.el8_4.x86_64
AppStream-8.4.0.Z.AUS:firefox-debuginfo-0:140.9.0-1.el8_4.x86_64
AppStream-8.4.0.Z.AUS:firefox-debugsource-0:140.9.0-1.el8_4.x86_64
AppStream-8.4.0.Z.EUS.EXTENSION:firefox-0:140.9.0-1.el8_4.src
AppStream-8.4.0.Z.EUS.EXTENSION:firefox-0:140.9.0-1.el8_4.x86_64
AppStream-8.4.0.Z.EUS.EXTENSION:firefox-debuginfo-0:140.9.0-1.el8_4.x86_64
AppStream-8.4.0.Z.EUS.EXTENSION:firefox-debugsource-0:140.9.0-1.el8_4.x86_64
Threats
Impact
Important
A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: Sandbox escape due to use-after-free in the Disability Access APIs component
7.5 (High)
Vendor Fix
For details on how to apply this update, which includes the changes described in this advisory, refer to:
https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2026:7858
Product status
Fixed
AppStream-8.4.0.Z.AUS:firefox-0:140.9.0-1.el8_4.src
AppStream-8.4.0.Z.AUS:firefox-0:140.9.0-1.el8_4.x86_64
AppStream-8.4.0.Z.AUS:firefox-debuginfo-0:140.9.0-1.el8_4.x86_64
AppStream-8.4.0.Z.AUS:firefox-debugsource-0:140.9.0-1.el8_4.x86_64
AppStream-8.4.0.Z.EUS.EXTENSION:firefox-0:140.9.0-1.el8_4.src
AppStream-8.4.0.Z.EUS.EXTENSION:firefox-0:140.9.0-1.el8_4.x86_64
AppStream-8.4.0.Z.EUS.EXTENSION:firefox-debuginfo-0:140.9.0-1.el8_4.x86_64
AppStream-8.4.0.Z.EUS.EXTENSION:firefox-debugsource-0:140.9.0-1.el8_4.x86_64
Threats
Impact
Important
A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: Sandbox escape due to incorrect boundary conditions, integer overflow in the XPCOM component
7.5 (High)
Vendor Fix
For details on how to apply this update, which includes the changes described in this advisory, refer to:
https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2026:7858
Product status
Fixed
AppStream-8.4.0.Z.AUS:firefox-0:140.9.0-1.el8_4.src
AppStream-8.4.0.Z.AUS:firefox-0:140.9.0-1.el8_4.x86_64
AppStream-8.4.0.Z.AUS:firefox-debuginfo-0:140.9.0-1.el8_4.x86_64
AppStream-8.4.0.Z.AUS:firefox-debugsource-0:140.9.0-1.el8_4.x86_64
AppStream-8.4.0.Z.EUS.EXTENSION:firefox-0:140.9.0-1.el8_4.src
AppStream-8.4.0.Z.EUS.EXTENSION:firefox-0:140.9.0-1.el8_4.x86_64
AppStream-8.4.0.Z.EUS.EXTENSION:firefox-debuginfo-0:140.9.0-1.el8_4.x86_64
AppStream-8.4.0.Z.EUS.EXTENSION:firefox-debugsource-0:140.9.0-1.el8_4.x86_64
Threats
Impact
Important
A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: Sandbox escape due to incorrect boundary conditions, integer overflow in the XPCOM component
7.5 (High)
Vendor Fix
For details on how to apply this update, which includes the changes described in this advisory, refer to:
https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2026:7858
Product status
Fixed
AppStream-8.4.0.Z.AUS:firefox-0:140.9.0-1.el8_4.src
AppStream-8.4.0.Z.AUS:firefox-0:140.9.0-1.el8_4.x86_64
AppStream-8.4.0.Z.AUS:firefox-debuginfo-0:140.9.0-1.el8_4.x86_64
AppStream-8.4.0.Z.AUS:firefox-debugsource-0:140.9.0-1.el8_4.x86_64
AppStream-8.4.0.Z.EUS.EXTENSION:firefox-0:140.9.0-1.el8_4.src
AppStream-8.4.0.Z.EUS.EXTENSION:firefox-0:140.9.0-1.el8_4.x86_64
AppStream-8.4.0.Z.EUS.EXTENSION:firefox-debuginfo-0:140.9.0-1.el8_4.x86_64
AppStream-8.4.0.Z.EUS.EXTENSION:firefox-debugsource-0:140.9.0-1.el8_4.x86_64
Threats
Impact
Important
A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: Use-after-free in the CSS Parsing and Computation component
7.5 (High)
Vendor Fix
For details on how to apply this update, which includes the changes described in this advisory, refer to:
https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2026:7858
Product status
Fixed
AppStream-8.4.0.Z.AUS:firefox-0:140.9.0-1.el8_4.src
AppStream-8.4.0.Z.AUS:firefox-0:140.9.0-1.el8_4.x86_64
AppStream-8.4.0.Z.AUS:firefox-debuginfo-0:140.9.0-1.el8_4.x86_64
AppStream-8.4.0.Z.AUS:firefox-debugsource-0:140.9.0-1.el8_4.x86_64
AppStream-8.4.0.Z.EUS.EXTENSION:firefox-0:140.9.0-1.el8_4.src
AppStream-8.4.0.Z.EUS.EXTENSION:firefox-0:140.9.0-1.el8_4.x86_64
AppStream-8.4.0.Z.EUS.EXTENSION:firefox-debuginfo-0:140.9.0-1.el8_4.x86_64
AppStream-8.4.0.Z.EUS.EXTENSION:firefox-debugsource-0:140.9.0-1.el8_4.x86_64
Threats
Impact
Important
A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: Sandbox escape in the Responsive Design Mode component
7.5 (High)
Vendor Fix
For details on how to apply this update, which includes the changes described in this advisory, refer to:
https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2026:7858
Product status
Fixed
AppStream-8.4.0.Z.AUS:firefox-0:140.9.0-1.el8_4.src
AppStream-8.4.0.Z.AUS:firefox-0:140.9.0-1.el8_4.x86_64
AppStream-8.4.0.Z.AUS:firefox-debuginfo-0:140.9.0-1.el8_4.x86_64
AppStream-8.4.0.Z.AUS:firefox-debugsource-0:140.9.0-1.el8_4.x86_64
AppStream-8.4.0.Z.EUS.EXTENSION:firefox-0:140.9.0-1.el8_4.src
AppStream-8.4.0.Z.EUS.EXTENSION:firefox-0:140.9.0-1.el8_4.x86_64
AppStream-8.4.0.Z.EUS.EXTENSION:firefox-debuginfo-0:140.9.0-1.el8_4.x86_64
AppStream-8.4.0.Z.EUS.EXTENSION:firefox-debugsource-0:140.9.0-1.el8_4.x86_64
Threats
Impact
Important
A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: Incorrect boundary conditions in the Audio/Video: Playback component
7.5 (High)
Vendor Fix
For details on how to apply this update, which includes the changes described in this advisory, refer to:
https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2026:7858
Product status
Fixed
AppStream-8.4.0.Z.AUS:firefox-0:140.9.0-1.el8_4.src
AppStream-8.4.0.Z.AUS:firefox-0:140.9.0-1.el8_4.x86_64
AppStream-8.4.0.Z.AUS:firefox-debuginfo-0:140.9.0-1.el8_4.x86_64
AppStream-8.4.0.Z.AUS:firefox-debugsource-0:140.9.0-1.el8_4.x86_64
AppStream-8.4.0.Z.EUS.EXTENSION:firefox-0:140.9.0-1.el8_4.src
AppStream-8.4.0.Z.EUS.EXTENSION:firefox-0:140.9.0-1.el8_4.x86_64
AppStream-8.4.0.Z.EUS.EXTENSION:firefox-debuginfo-0:140.9.0-1.el8_4.x86_64
AppStream-8.4.0.Z.EUS.EXTENSION:firefox-debugsource-0:140.9.0-1.el8_4.x86_64
Threats
Impact
Important
A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: Incorrect boundary conditions, integer overflow in the Graphics component
7.5 (High)
Vendor Fix
For details on how to apply this update, which includes the changes described in this advisory, refer to:
https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2026:7858
Product status
Fixed
AppStream-8.4.0.Z.AUS:firefox-0:140.9.0-1.el8_4.src
AppStream-8.4.0.Z.AUS:firefox-0:140.9.0-1.el8_4.x86_64
AppStream-8.4.0.Z.AUS:firefox-debuginfo-0:140.9.0-1.el8_4.x86_64
AppStream-8.4.0.Z.AUS:firefox-debugsource-0:140.9.0-1.el8_4.x86_64
AppStream-8.4.0.Z.EUS.EXTENSION:firefox-0:140.9.0-1.el8_4.src
AppStream-8.4.0.Z.EUS.EXTENSION:firefox-0:140.9.0-1.el8_4.x86_64
AppStream-8.4.0.Z.EUS.EXTENSION:firefox-debuginfo-0:140.9.0-1.el8_4.x86_64
AppStream-8.4.0.Z.EUS.EXTENSION:firefox-debugsource-0:140.9.0-1.el8_4.x86_64
Threats
Impact
Important
A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: Incorrect boundary conditions in the Audio/Video: Web Codecs component
7.5 (High)
Vendor Fix
For details on how to apply this update, which includes the changes described in this advisory, refer to:
https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2026:7858
Product status
Fixed
AppStream-8.4.0.Z.AUS:firefox-0:140.9.0-1.el8_4.src
AppStream-8.4.0.Z.AUS:firefox-0:140.9.0-1.el8_4.x86_64
AppStream-8.4.0.Z.AUS:firefox-debuginfo-0:140.9.0-1.el8_4.x86_64
AppStream-8.4.0.Z.AUS:firefox-debugsource-0:140.9.0-1.el8_4.x86_64
AppStream-8.4.0.Z.EUS.EXTENSION:firefox-0:140.9.0-1.el8_4.src
AppStream-8.4.0.Z.EUS.EXTENSION:firefox-0:140.9.0-1.el8_4.x86_64
AppStream-8.4.0.Z.EUS.EXTENSION:firefox-debuginfo-0:140.9.0-1.el8_4.x86_64
AppStream-8.4.0.Z.EUS.EXTENSION:firefox-debugsource-0:140.9.0-1.el8_4.x86_64
Threats
Impact
Important
A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: Use-after-free in the Layout: Text and Fonts component
7.5 (High)
Vendor Fix
For details on how to apply this update, which includes the changes described in this advisory, refer to:
https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2026:7858
Product status
Fixed
AppStream-8.4.0.Z.AUS:firefox-0:140.9.0-1.el8_4.src
AppStream-8.4.0.Z.AUS:firefox-0:140.9.0-1.el8_4.x86_64
AppStream-8.4.0.Z.AUS:firefox-debuginfo-0:140.9.0-1.el8_4.x86_64
AppStream-8.4.0.Z.AUS:firefox-debugsource-0:140.9.0-1.el8_4.x86_64
AppStream-8.4.0.Z.EUS.EXTENSION:firefox-0:140.9.0-1.el8_4.src
AppStream-8.4.0.Z.EUS.EXTENSION:firefox-0:140.9.0-1.el8_4.x86_64
AppStream-8.4.0.Z.EUS.EXTENSION:firefox-debuginfo-0:140.9.0-1.el8_4.x86_64
AppStream-8.4.0.Z.EUS.EXTENSION:firefox-debugsource-0:140.9.0-1.el8_4.x86_64
Threats
Impact
Important
A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: Incorrect boundary conditions in the Audio/Video: Web Codecs component
7.5 (High)
Vendor Fix
For details on how to apply this update, which includes the changes described in this advisory, refer to:
https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2026:7858
Product status
Fixed
AppStream-8.4.0.Z.AUS:firefox-0:140.9.0-1.el8_4.src
AppStream-8.4.0.Z.AUS:firefox-0:140.9.0-1.el8_4.x86_64
AppStream-8.4.0.Z.AUS:firefox-debuginfo-0:140.9.0-1.el8_4.x86_64
AppStream-8.4.0.Z.AUS:firefox-debugsource-0:140.9.0-1.el8_4.x86_64
AppStream-8.4.0.Z.EUS.EXTENSION:firefox-0:140.9.0-1.el8_4.src
AppStream-8.4.0.Z.EUS.EXTENSION:firefox-0:140.9.0-1.el8_4.x86_64
AppStream-8.4.0.Z.EUS.EXTENSION:firefox-debuginfo-0:140.9.0-1.el8_4.x86_64
AppStream-8.4.0.Z.EUS.EXTENSION:firefox-debugsource-0:140.9.0-1.el8_4.x86_64
Threats
Impact
Important
A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: JIT miscompilation in the JavaScript Engine: JIT component
7.5 (High)
Vendor Fix
For details on how to apply this update, which includes the changes described in this advisory, refer to:
https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2026:7858
Product status
Fixed
AppStream-8.4.0.Z.AUS:firefox-0:140.9.0-1.el8_4.src
AppStream-8.4.0.Z.AUS:firefox-0:140.9.0-1.el8_4.x86_64
AppStream-8.4.0.Z.AUS:firefox-debuginfo-0:140.9.0-1.el8_4.x86_64
AppStream-8.4.0.Z.AUS:firefox-debugsource-0:140.9.0-1.el8_4.x86_64
AppStream-8.4.0.Z.EUS.EXTENSION:firefox-0:140.9.0-1.el8_4.src
AppStream-8.4.0.Z.EUS.EXTENSION:firefox-0:140.9.0-1.el8_4.x86_64
AppStream-8.4.0.Z.EUS.EXTENSION:firefox-debuginfo-0:140.9.0-1.el8_4.x86_64
AppStream-8.4.0.Z.EUS.EXTENSION:firefox-debugsource-0:140.9.0-1.el8_4.x86_64
Threats
Impact
Important
A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: Incorrect boundary conditions in the Layout: Text and Fonts component
7.5 (High)
Vendor Fix
For details on how to apply this update, which includes the changes described in this advisory, refer to:
https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2026:7858
Product status
Fixed
AppStream-8.4.0.Z.AUS:firefox-0:140.9.0-1.el8_4.src
AppStream-8.4.0.Z.AUS:firefox-0:140.9.0-1.el8_4.x86_64
AppStream-8.4.0.Z.AUS:firefox-debuginfo-0:140.9.0-1.el8_4.x86_64
AppStream-8.4.0.Z.AUS:firefox-debugsource-0:140.9.0-1.el8_4.x86_64
AppStream-8.4.0.Z.EUS.EXTENSION:firefox-0:140.9.0-1.el8_4.src
AppStream-8.4.0.Z.EUS.EXTENSION:firefox-0:140.9.0-1.el8_4.x86_64
AppStream-8.4.0.Z.EUS.EXTENSION:firefox-debuginfo-0:140.9.0-1.el8_4.x86_64
AppStream-8.4.0.Z.EUS.EXTENSION:firefox-debugsource-0:140.9.0-1.el8_4.x86_64
Threats
Impact
Important
A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: Mitigation bypass in the Networking: HTTP component
7.5 (High)
Vendor Fix
For details on how to apply this update, which includes the changes described in this advisory, refer to:
https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2026:7858
Product status
Fixed
AppStream-8.4.0.Z.AUS:firefox-0:140.9.0-1.el8_4.src
AppStream-8.4.0.Z.AUS:firefox-0:140.9.0-1.el8_4.x86_64
AppStream-8.4.0.Z.AUS:firefox-debuginfo-0:140.9.0-1.el8_4.x86_64
AppStream-8.4.0.Z.AUS:firefox-debugsource-0:140.9.0-1.el8_4.x86_64
AppStream-8.4.0.Z.EUS.EXTENSION:firefox-0:140.9.0-1.el8_4.src
AppStream-8.4.0.Z.EUS.EXTENSION:firefox-0:140.9.0-1.el8_4.x86_64
AppStream-8.4.0.Z.EUS.EXTENSION:firefox-debuginfo-0:140.9.0-1.el8_4.x86_64
AppStream-8.4.0.Z.EUS.EXTENSION:firefox-debugsource-0:140.9.0-1.el8_4.x86_64
Threats
Impact
Important
A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: Use-after-free in the JavaScript Engine component
6.1 (Medium)
Vendor Fix
For details on how to apply this update, which includes the changes described in this advisory, refer to:
https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2026:7858
Product status
Fixed
AppStream-8.4.0.Z.AUS:firefox-0:140.9.0-1.el8_4.src
AppStream-8.4.0.Z.AUS:firefox-0:140.9.0-1.el8_4.x86_64
AppStream-8.4.0.Z.AUS:firefox-debuginfo-0:140.9.0-1.el8_4.x86_64
AppStream-8.4.0.Z.AUS:firefox-debugsource-0:140.9.0-1.el8_4.x86_64
AppStream-8.4.0.Z.EUS.EXTENSION:firefox-0:140.9.0-1.el8_4.src
AppStream-8.4.0.Z.EUS.EXTENSION:firefox-0:140.9.0-1.el8_4.x86_64
AppStream-8.4.0.Z.EUS.EXTENSION:firefox-debuginfo-0:140.9.0-1.el8_4.x86_64
AppStream-8.4.0.Z.EUS.EXTENSION:firefox-debugsource-0:140.9.0-1.el8_4.x86_64
Threats
Impact
Moderate
A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: JIT miscompilation in the JavaScript Engine component
6.1 (Medium)
Vendor Fix
For details on how to apply this update, which includes the changes described in this advisory, refer to:
https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2026:7858
Product status
Fixed
AppStream-8.4.0.Z.AUS:firefox-0:140.9.0-1.el8_4.src
AppStream-8.4.0.Z.AUS:firefox-0:140.9.0-1.el8_4.x86_64
AppStream-8.4.0.Z.AUS:firefox-debuginfo-0:140.9.0-1.el8_4.x86_64
AppStream-8.4.0.Z.AUS:firefox-debugsource-0:140.9.0-1.el8_4.x86_64
AppStream-8.4.0.Z.EUS.EXTENSION:firefox-0:140.9.0-1.el8_4.src
AppStream-8.4.0.Z.EUS.EXTENSION:firefox-0:140.9.0-1.el8_4.x86_64
AppStream-8.4.0.Z.EUS.EXTENSION:firefox-debuginfo-0:140.9.0-1.el8_4.x86_64
AppStream-8.4.0.Z.EUS.EXTENSION:firefox-debugsource-0:140.9.0-1.el8_4.x86_64
Threats
Impact
Moderate
A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: Denial-of-service in the WebRTC: Signaling component
7.5 (High)
Vendor Fix
For details on how to apply this update, which includes the changes described in this advisory, refer to:
https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2026:7858
Product status
Fixed
AppStream-8.4.0.Z.AUS:firefox-0:140.9.0-1.el8_4.src
AppStream-8.4.0.Z.AUS:firefox-0:140.9.0-1.el8_4.x86_64
AppStream-8.4.0.Z.AUS:firefox-debuginfo-0:140.9.0-1.el8_4.x86_64
AppStream-8.4.0.Z.AUS:firefox-debugsource-0:140.9.0-1.el8_4.x86_64
AppStream-8.4.0.Z.EUS.EXTENSION:firefox-0:140.9.0-1.el8_4.src
AppStream-8.4.0.Z.EUS.EXTENSION:firefox-0:140.9.0-1.el8_4.x86_64
AppStream-8.4.0.Z.EUS.EXTENSION:firefox-debuginfo-0:140.9.0-1.el8_4.x86_64
AppStream-8.4.0.Z.EUS.EXTENSION:firefox-debugsource-0:140.9.0-1.el8_4.x86_64
Threats
Impact
Moderate
A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: Undefined behavior in the WebRTC: Signaling component
6.5 (Medium)
Vendor Fix
For details on how to apply this update, which includes the changes described in this advisory, refer to:
https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2026:7858
Product status
Fixed
AppStream-8.4.0.Z.AUS:firefox-0:140.9.0-1.el8_4.src
AppStream-8.4.0.Z.AUS:firefox-0:140.9.0-1.el8_4.x86_64
AppStream-8.4.0.Z.AUS:firefox-debuginfo-0:140.9.0-1.el8_4.x86_64
AppStream-8.4.0.Z.AUS:firefox-debugsource-0:140.9.0-1.el8_4.x86_64
AppStream-8.4.0.Z.EUS.EXTENSION:firefox-0:140.9.0-1.el8_4.src
AppStream-8.4.0.Z.EUS.EXTENSION:firefox-0:140.9.0-1.el8_4.x86_64
AppStream-8.4.0.Z.EUS.EXTENSION:firefox-debuginfo-0:140.9.0-1.el8_4.x86_64
AppStream-8.4.0.Z.EUS.EXTENSION:firefox-debugsource-0:140.9.0-1.el8_4.x86_64
Threats
Impact
Moderate
A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: Incorrect boundary conditions in the Graphics: Canvas2D component
6.1 (Medium)
Vendor Fix
For details on how to apply this update, which includes the changes described in this advisory, refer to:
https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2026:7858
Product status
Fixed
AppStream-8.4.0.Z.AUS:firefox-0:140.9.0-1.el8_4.src
AppStream-8.4.0.Z.AUS:firefox-0:140.9.0-1.el8_4.x86_64
AppStream-8.4.0.Z.AUS:firefox-debuginfo-0:140.9.0-1.el8_4.x86_64
AppStream-8.4.0.Z.AUS:firefox-debugsource-0:140.9.0-1.el8_4.x86_64
AppStream-8.4.0.Z.EUS.EXTENSION:firefox-0:140.9.0-1.el8_4.src
AppStream-8.4.0.Z.EUS.EXTENSION:firefox-0:140.9.0-1.el8_4.x86_64
AppStream-8.4.0.Z.EUS.EXTENSION:firefox-debuginfo-0:140.9.0-1.el8_4.x86_64
AppStream-8.4.0.Z.EUS.EXTENSION:firefox-debugsource-0:140.9.0-1.el8_4.x86_64
Threats
Impact
Moderate
A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: Incorrect boundary conditions in the Graphics: Canvas2D component
6.1 (Medium)
Vendor Fix
For details on how to apply this update, which includes the changes described in this advisory, refer to:
https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2026:7858
Product status
Fixed
AppStream-8.4.0.Z.AUS:firefox-0:140.9.0-1.el8_4.src
AppStream-8.4.0.Z.AUS:firefox-0:140.9.0-1.el8_4.x86_64
AppStream-8.4.0.Z.AUS:firefox-debuginfo-0:140.9.0-1.el8_4.x86_64
AppStream-8.4.0.Z.AUS:firefox-debugsource-0:140.9.0-1.el8_4.x86_64
AppStream-8.4.0.Z.EUS.EXTENSION:firefox-0:140.9.0-1.el8_4.src
AppStream-8.4.0.Z.EUS.EXTENSION:firefox-0:140.9.0-1.el8_4.x86_64
AppStream-8.4.0.Z.EUS.EXTENSION:firefox-debuginfo-0:140.9.0-1.el8_4.x86_64
AppStream-8.4.0.Z.EUS.EXTENSION:firefox-debugsource-0:140.9.0-1.el8_4.x86_64
Threats
Impact
Moderate
A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: Incorrect boundary conditions in the Graphics component
6.1 (Medium)
Vendor Fix
For details on how to apply this update, which includes the changes described in this advisory, refer to:
https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2026:7858
Product status
Fixed
AppStream-8.4.0.Z.AUS:firefox-0:140.9.0-1.el8_4.src
AppStream-8.4.0.Z.AUS:firefox-0:140.9.0-1.el8_4.x86_64
AppStream-8.4.0.Z.AUS:firefox-debuginfo-0:140.9.0-1.el8_4.x86_64
AppStream-8.4.0.Z.AUS:firefox-debugsource-0:140.9.0-1.el8_4.x86_64
AppStream-8.4.0.Z.EUS.EXTENSION:firefox-0:140.9.0-1.el8_4.src
AppStream-8.4.0.Z.EUS.EXTENSION:firefox-0:140.9.0-1.el8_4.x86_64
AppStream-8.4.0.Z.EUS.EXTENSION:firefox-debuginfo-0:140.9.0-1.el8_4.x86_64
AppStream-8.4.0.Z.EUS.EXTENSION:firefox-debugsource-0:140.9.0-1.el8_4.x86_64
Threats
Impact
Moderate
A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: Incorrect boundary conditions in the Audio/Video: GMP component
6.1 (Medium)
Vendor Fix
For details on how to apply this update, which includes the changes described in this advisory, refer to:
https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2026:7858
Product status
Fixed
AppStream-8.4.0.Z.AUS:firefox-0:140.9.0-1.el8_4.src
AppStream-8.4.0.Z.AUS:firefox-0:140.9.0-1.el8_4.x86_64
AppStream-8.4.0.Z.AUS:firefox-debuginfo-0:140.9.0-1.el8_4.x86_64
AppStream-8.4.0.Z.AUS:firefox-debugsource-0:140.9.0-1.el8_4.x86_64
AppStream-8.4.0.Z.EUS.EXTENSION:firefox-0:140.9.0-1.el8_4.src
AppStream-8.4.0.Z.EUS.EXTENSION:firefox-0:140.9.0-1.el8_4.x86_64
AppStream-8.4.0.Z.EUS.EXTENSION:firefox-debuginfo-0:140.9.0-1.el8_4.x86_64
AppStream-8.4.0.Z.EUS.EXTENSION:firefox-debugsource-0:140.9.0-1.el8_4.x86_64
Threats
Impact
Moderate
A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: Incorrect boundary conditions in the Audio/Video component
6.1 (Medium)
Vendor Fix
For details on how to apply this update, which includes the changes described in this advisory, refer to:
https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2026:7858
Product status
Fixed
AppStream-8.4.0.Z.AUS:firefox-0:140.9.0-1.el8_4.src
AppStream-8.4.0.Z.AUS:firefox-0:140.9.0-1.el8_4.x86_64
AppStream-8.4.0.Z.AUS:firefox-debuginfo-0:140.9.0-1.el8_4.x86_64
AppStream-8.4.0.Z.AUS:firefox-debugsource-0:140.9.0-1.el8_4.x86_64
AppStream-8.4.0.Z.EUS.EXTENSION:firefox-0:140.9.0-1.el8_4.src
AppStream-8.4.0.Z.EUS.EXTENSION:firefox-0:140.9.0-1.el8_4.x86_64
AppStream-8.4.0.Z.EUS.EXTENSION:firefox-debuginfo-0:140.9.0-1.el8_4.x86_64
AppStream-8.4.0.Z.EUS.EXTENSION:firefox-debugsource-0:140.9.0-1.el8_4.x86_64
Threats
Impact
Moderate
A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: Use-after-free in the Widget: Cocoa component
6.1 (Medium)
Vendor Fix
For details on how to apply this update, which includes the changes described in this advisory, refer to:
https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2026:7858
Product status
Fixed
AppStream-8.4.0.Z.AUS:firefox-0:140.9.0-1.el8_4.src
AppStream-8.4.0.Z.AUS:firefox-0:140.9.0-1.el8_4.x86_64
AppStream-8.4.0.Z.AUS:firefox-debuginfo-0:140.9.0-1.el8_4.x86_64
AppStream-8.4.0.Z.AUS:firefox-debugsource-0:140.9.0-1.el8_4.x86_64
AppStream-8.4.0.Z.EUS.EXTENSION:firefox-0:140.9.0-1.el8_4.src
AppStream-8.4.0.Z.EUS.EXTENSION:firefox-0:140.9.0-1.el8_4.x86_64
AppStream-8.4.0.Z.EUS.EXTENSION:firefox-debuginfo-0:140.9.0-1.el8_4.x86_64
AppStream-8.4.0.Z.EUS.EXTENSION:firefox-debugsource-0:140.9.0-1.el8_4.x86_64
Threats
Impact
Moderate
A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: Information disclosure in the Widget: Cocoa component
6.5 (Medium)
Vendor Fix
For details on how to apply this update, which includes the changes described in this advisory, refer to:
https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2026:7858
Product status
Fixed
AppStream-8.4.0.Z.AUS:firefox-0:140.9.0-1.el8_4.src
AppStream-8.4.0.Z.AUS:firefox-0:140.9.0-1.el8_4.x86_64
AppStream-8.4.0.Z.AUS:firefox-debuginfo-0:140.9.0-1.el8_4.x86_64
AppStream-8.4.0.Z.AUS:firefox-debugsource-0:140.9.0-1.el8_4.x86_64
AppStream-8.4.0.Z.EUS.EXTENSION:firefox-0:140.9.0-1.el8_4.src
AppStream-8.4.0.Z.EUS.EXTENSION:firefox-0:140.9.0-1.el8_4.x86_64
AppStream-8.4.0.Z.EUS.EXTENSION:firefox-debuginfo-0:140.9.0-1.el8_4.x86_64
AppStream-8.4.0.Z.EUS.EXTENSION:firefox-debugsource-0:140.9.0-1.el8_4.x86_64
Threats
Impact
Moderate
A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: Incorrect boundary conditions in the Graphics component
6.1 (Medium)
Vendor Fix
For details on how to apply this update, which includes the changes described in this advisory, refer to:
https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2026:7858
Product status
Fixed
AppStream-8.4.0.Z.AUS:firefox-0:140.9.0-1.el8_4.src
AppStream-8.4.0.Z.AUS:firefox-0:140.9.0-1.el8_4.x86_64
AppStream-8.4.0.Z.AUS:firefox-debuginfo-0:140.9.0-1.el8_4.x86_64
AppStream-8.4.0.Z.AUS:firefox-debugsource-0:140.9.0-1.el8_4.x86_64
AppStream-8.4.0.Z.EUS.EXTENSION:firefox-0:140.9.0-1.el8_4.src
AppStream-8.4.0.Z.EUS.EXTENSION:firefox-0:140.9.0-1.el8_4.x86_64
AppStream-8.4.0.Z.EUS.EXTENSION:firefox-debuginfo-0:140.9.0-1.el8_4.x86_64
AppStream-8.4.0.Z.EUS.EXTENSION:firefox-debugsource-0:140.9.0-1.el8_4.x86_64
Threats
Impact
Moderate
A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: Incorrect boundary conditions in the Audio/Video component
6.5 (Medium)
Vendor Fix
For details on how to apply this update, which includes the changes described in this advisory, refer to:
https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2026:7858
Product status
Fixed
AppStream-8.4.0.Z.AUS:firefox-0:140.9.0-1.el8_4.src
AppStream-8.4.0.Z.AUS:firefox-0:140.9.0-1.el8_4.x86_64
AppStream-8.4.0.Z.AUS:firefox-debuginfo-0:140.9.0-1.el8_4.x86_64
AppStream-8.4.0.Z.AUS:firefox-debugsource-0:140.9.0-1.el8_4.x86_64
AppStream-8.4.0.Z.EUS.EXTENSION:firefox-0:140.9.0-1.el8_4.src
AppStream-8.4.0.Z.EUS.EXTENSION:firefox-0:140.9.0-1.el8_4.x86_64
AppStream-8.4.0.Z.EUS.EXTENSION:firefox-debuginfo-0:140.9.0-1.el8_4.x86_64
AppStream-8.4.0.Z.EUS.EXTENSION:firefox-debugsource-0:140.9.0-1.el8_4.x86_64
Threats
Impact
Moderate
A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: Uninitialized memory in the Graphics: Canvas2D component
6.5 (Medium)
Vendor Fix
For details on how to apply this update, which includes the changes described in this advisory, refer to:
https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2026:7858
Product status
Fixed
AppStream-8.4.0.Z.AUS:firefox-0:140.9.0-1.el8_4.src
AppStream-8.4.0.Z.AUS:firefox-0:140.9.0-1.el8_4.x86_64
AppStream-8.4.0.Z.AUS:firefox-debuginfo-0:140.9.0-1.el8_4.x86_64
AppStream-8.4.0.Z.AUS:firefox-debugsource-0:140.9.0-1.el8_4.x86_64
AppStream-8.4.0.Z.EUS.EXTENSION:firefox-0:140.9.0-1.el8_4.src
AppStream-8.4.0.Z.EUS.EXTENSION:firefox-0:140.9.0-1.el8_4.x86_64
AppStream-8.4.0.Z.EUS.EXTENSION:firefox-debuginfo-0:140.9.0-1.el8_4.x86_64
AppStream-8.4.0.Z.EUS.EXTENSION:firefox-debugsource-0:140.9.0-1.el8_4.x86_64
Threats
Impact
Moderate
A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: Incorrect boundary conditions, uninitialized memory in the JavaScript Engine component
6.1 (Medium)
Vendor Fix
For details on how to apply this update, which includes the changes described in this advisory, refer to:
https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2026:7858
Product status
Fixed
AppStream-8.4.0.Z.AUS:firefox-0:140.9.0-1.el8_4.src
AppStream-8.4.0.Z.AUS:firefox-0:140.9.0-1.el8_4.x86_64
AppStream-8.4.0.Z.AUS:firefox-debuginfo-0:140.9.0-1.el8_4.x86_64
AppStream-8.4.0.Z.AUS:firefox-debugsource-0:140.9.0-1.el8_4.x86_64
AppStream-8.4.0.Z.EUS.EXTENSION:firefox-0:140.9.0-1.el8_4.src
AppStream-8.4.0.Z.EUS.EXTENSION:firefox-0:140.9.0-1.el8_4.x86_64
AppStream-8.4.0.Z.EUS.EXTENSION:firefox-debuginfo-0:140.9.0-1.el8_4.x86_64
AppStream-8.4.0.Z.EUS.EXTENSION:firefox-debugsource-0:140.9.0-1.el8_4.x86_64
Threats
Impact
Moderate
A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: Privilege escalation in the Netmonitor component
6.1 (Medium)
Vendor Fix
For details on how to apply this update, which includes the changes described in this advisory, refer to:
https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2026:7858
Product status
Fixed
AppStream-8.4.0.Z.AUS:firefox-0:140.9.0-1.el8_4.src
AppStream-8.4.0.Z.AUS:firefox-0:140.9.0-1.el8_4.x86_64
AppStream-8.4.0.Z.AUS:firefox-debuginfo-0:140.9.0-1.el8_4.x86_64
AppStream-8.4.0.Z.AUS:firefox-debugsource-0:140.9.0-1.el8_4.x86_64
AppStream-8.4.0.Z.EUS.EXTENSION:firefox-0:140.9.0-1.el8_4.src
AppStream-8.4.0.Z.EUS.EXTENSION:firefox-0:140.9.0-1.el8_4.x86_64
AppStream-8.4.0.Z.EUS.EXTENSION:firefox-debuginfo-0:140.9.0-1.el8_4.x86_64
AppStream-8.4.0.Z.EUS.EXTENSION:firefox-debugsource-0:140.9.0-1.el8_4.x86_64
Threats
Impact
Moderate
A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: Undefined behavior in the WebRTC: Signaling component
CWE-475 - Undefined Behavior for Input to API
Vendor Fix
For details on how to apply this update, which includes the changes described in this advisory, refer to:
https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2026:7858
Product status
Fixed
AppStream-8.4.0.Z.AUS:firefox-0:140.9.0-1.el8_4.src
AppStream-8.4.0.Z.AUS:firefox-0:140.9.0-1.el8_4.x86_64
AppStream-8.4.0.Z.AUS:firefox-debuginfo-0:140.9.0-1.el8_4.x86_64
AppStream-8.4.0.Z.AUS:firefox-debugsource-0:140.9.0-1.el8_4.x86_64
AppStream-8.4.0.Z.EUS.EXTENSION:firefox-0:140.9.0-1.el8_4.src
AppStream-8.4.0.Z.EUS.EXTENSION:firefox-0:140.9.0-1.el8_4.x86_64
AppStream-8.4.0.Z.EUS.EXTENSION:firefox-debuginfo-0:140.9.0-1.el8_4.x86_64
AppStream-8.4.0.Z.EUS.EXTENSION:firefox-debugsource-0:140.9.0-1.el8_4.x86_64
Threats
Impact
Low
A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: Incorrect boundary conditions in the Graphics: Text component
CWE-805 - Buffer Access with Incorrect Length Value
Vendor Fix
For details on how to apply this update, which includes the changes described in this advisory, refer to:
https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2026:7858
Product status
Fixed
AppStream-8.4.0.Z.AUS:firefox-0:140.9.0-1.el8_4.src
AppStream-8.4.0.Z.AUS:firefox-0:140.9.0-1.el8_4.x86_64
AppStream-8.4.0.Z.AUS:firefox-debuginfo-0:140.9.0-1.el8_4.x86_64
AppStream-8.4.0.Z.AUS:firefox-debugsource-0:140.9.0-1.el8_4.x86_64
AppStream-8.4.0.Z.EUS.EXTENSION:firefox-0:140.9.0-1.el8_4.src
AppStream-8.4.0.Z.EUS.EXTENSION:firefox-0:140.9.0-1.el8_4.x86_64
AppStream-8.4.0.Z.EUS.EXTENSION:firefox-debuginfo-0:140.9.0-1.el8_4.x86_64
AppStream-8.4.0.Z.EUS.EXTENSION:firefox-debugsource-0:140.9.0-1.el8_4.x86_64
Threats
Impact
Low
A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: Memory safety bugs present in Firefox ESR 140.8, Thunderbird ESR 140.8, Firefox 148 and Thunderbird 148. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code.
7.5 (High)
Vendor Fix
For details on how to apply this update, which includes the changes described in this advisory, refer to:
https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2026:7858
Product status
Fixed
AppStream-8.4.0.Z.AUS:firefox-0:140.9.0-1.el8_4.src
AppStream-8.4.0.Z.AUS:firefox-0:140.9.0-1.el8_4.x86_64
AppStream-8.4.0.Z.AUS:firefox-debuginfo-0:140.9.0-1.el8_4.x86_64
AppStream-8.4.0.Z.AUS:firefox-debugsource-0:140.9.0-1.el8_4.x86_64
AppStream-8.4.0.Z.EUS.EXTENSION:firefox-0:140.9.0-1.el8_4.src
AppStream-8.4.0.Z.EUS.EXTENSION:firefox-0:140.9.0-1.el8_4.x86_64
AppStream-8.4.0.Z.EUS.EXTENSION:firefox-debuginfo-0:140.9.0-1.el8_4.x86_64
AppStream-8.4.0.Z.EUS.EXTENSION:firefox-debugsource-0:140.9.0-1.el8_4.x86_64
Threats
Impact
Important
A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: Memory safety bugs present in Firefox ESR 115.33, Firefox ESR 140.8, Thunderbird ESR 140.8, Firefox 148 and Thunderbird 148. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code.
7.5 (High)
Vendor Fix
For details on how to apply this update, which includes the changes described in this advisory, refer to:
https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2026:7858
Product status
Fixed
AppStream-8.4.0.Z.AUS:firefox-0:140.9.0-1.el8_4.src
AppStream-8.4.0.Z.AUS:firefox-0:140.9.0-1.el8_4.x86_64
AppStream-8.4.0.Z.AUS:firefox-debuginfo-0:140.9.0-1.el8_4.x86_64
AppStream-8.4.0.Z.AUS:firefox-debugsource-0:140.9.0-1.el8_4.x86_64
AppStream-8.4.0.Z.EUS.EXTENSION:firefox-0:140.9.0-1.el8_4.src
AppStream-8.4.0.Z.EUS.EXTENSION:firefox-0:140.9.0-1.el8_4.x86_64
AppStream-8.4.0.Z.EUS.EXTENSION:firefox-debuginfo-0:140.9.0-1.el8_4.x86_64
AppStream-8.4.0.Z.EUS.EXTENSION:firefox-debugsource-0:140.9.0-1.el8_4.x86_64
Threats
Impact
Important
References
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"text": "Mozilla Firefox is an open-source web browser, designed for standards compliance, performance, and portability.\n\nSecurity Fix(es):\n\n* firefox: thunderbird: Use-after-free in the JavaScript Engine component (CVE-2026-4701)\n\n* firefox: thunderbird: Memory safety bugs fixed in Firefox ESR 115.34, Firefox ESR 140.9, Thunderbird ESR 140.9, Firefox 149 and Thunderbird 149 (CVE-2026-4721)\n\n* firefox: thunderbird: Privilege escalation in the Netmonitor component (CVE-2026-4717)\n\n* firefox: thunderbird: Sandbox escape due to use-after-free in the Disability Access APIs component (CVE-2026-4688)\n\n* firefox: thunderbird: Incorrect boundary conditions in the Graphics: Canvas2D component (CVE-2026-4706)\n\n* firefox: thunderbird: Incorrect boundary conditions in the Audio/Video: Web Codecs component (CVE-2026-4695)\n\n* firefox: thunderbird: Sandbox escape due to incorrect boundary conditions, integer overflow in the XPCOM component (CVE-2026-4689)\n\n* firefox: thunderbird: JIT miscompilation in the JavaScript Engine: JIT component (CVE-2026-4698)\n\n* firefox: thunderbird: Incorrect boundary conditions, uninitialized memory in the JavaScript Engine component (CVE-2026-4716)\n\n* firefox: thunderbird: Race condition, use-after-free in the Graphics: WebRender component (CVE-2026-4684)\n\n* firefox: thunderbird: Undefined behavior in the WebRTC: Signaling component (CVE-2026-4705)\n\n* firefox: thunderbird: Uninitialized memory in the Graphics: Canvas2D component (CVE-2026-4715)\n\n* firefox: thunderbird: Incorrect boundary conditions in the Graphics: Canvas2D component (CVE-2026-4685)\n\n* firefox: thunderbird: Incorrect boundary conditions in the Audio/Video component (CVE-2026-4714)\n\n* firefox: thunderbird: Incorrect boundary conditions in the Audio/Video: GMP component (CVE-2026-4709)\n\n* firefox: thunderbird: Incorrect boundary conditions in the Audio/Video component (CVE-2026-4710)\n\n* firefox: thunderbird: Information disclosure in the Widget: Cocoa component (CVE-2026-4712)\n\n* firefox: thunderbird: Incorrect boundary conditions in the Audio/Video: Web Codecs component (CVE-2026-4697)\n\n* firefox: thunderbird: Incorrect boundary conditions in the Graphics component (CVE-2026-4713)\n\n* firefox: thunderbird: Sandbox escape due to incorrect boundary conditions, integer overflow in the XPCOM component (CVE-2026-4690)\n\n* firefox: thunderbird: Use-after-free in the Widget: Cocoa component (CVE-2026-4711)\n\n* firefox: thunderbird: Incorrect boundary conditions in the Graphics: Canvas2D component (CVE-2026-4686)\n\n* firefox: thunderbird: Incorrect boundary conditions in the Graphics component (CVE-2026-4708)\n\n* firefox: thunderbird: Use-after-free in the CSS Parsing and Computation component (CVE-2026-4691)\n\n* firefox: thunderbird: Incorrect boundary conditions in the Layout: Text and Fonts component (CVE-2026-4699)\n\n* firefox: thunderbird: Use-after-free in the Layout: Text and Fonts component (CVE-2026-4696)\n\n* firefox: thunderbird: Incorrect boundary conditions in the Audio/Video: Playback component (CVE-2026-4693)\n\n* firefox: thunderbird: Undefined behavior in the WebRTC: Signaling component (CVE-2026-4718)\n\n* firefox: thunderbird: JIT miscompilation in the JavaScript Engine component (CVE-2026-4702)\n\n* firefox: thunderbird: Incorrect boundary conditions in the Graphics: Text component (CVE-2026-4719)\n\n* firefox: thunderbird: Incorrect boundary conditions, integer overflow in the Graphics component (CVE-2026-4694)\n\n* firefox: thunderbird: Sandbox escape in the Responsive Design Mode component (CVE-2026-4692)\n\n* firefox: thunderbird: Memory safety bugs fixed in Firefox ESR 140.9, Thunderbird ESR 140.9, Firefox 149 and Thunderbird 149 (CVE-2026-4720)\n\n* firefox: thunderbird: Mitigation bypass in the Networking: HTTP component (CVE-2026-4700)\n\n* firefox: thunderbird: Incorrect boundary conditions in the Graphics: Canvas2D component (CVE-2026-4707)\n\n* firefox: thunderbird: Denial-of-service in the WebRTC: Signaling component (CVE-2026-4704)\n\n* firefox: thunderbird: Sandbox escape due to incorrect boundary conditions in the Telemetry component (CVE-2026-4687)\n\nFor more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.",
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},
"references": [
{
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"summary": "Canonical URL",
"url": "https://access.redhat.com/security/cve/CVE-2026-4720"
},
{
"category": "external",
"summary": "RHBZ#2450751",
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2450751"
},
{
"category": "external",
"summary": "https://www.cve.org/CVERecord?id=CVE-2026-4720",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-4720"
},
{
"category": "external",
"summary": "https://nvd.nist.gov/vuln/detail/CVE-2026-4720",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-4720"
},
{
"category": "external",
"summary": "https://www.mozilla.org/security/advisories/mfsa2026-22/#CVE-2026-4720",
"url": "https://www.mozilla.org/security/advisories/mfsa2026-22/#CVE-2026-4720"
},
{
"category": "external",
"summary": "https://www.mozilla.org/security/advisories/mfsa2026-24/#CVE-2026-4720",
"url": "https://www.mozilla.org/security/advisories/mfsa2026-24/#CVE-2026-4720"
}
],
"release_date": "2026-03-24T12:30:43.271000+00:00",
"remediations": [
{
"category": "vendor_fix",
"date": "2026-04-13T12:47:34+00:00",
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}
],
"scores": [
{
"cvss_v3": {
"attackComplexity": "HIGH",
"attackVector": "NETWORK",
"availabilityImpact": "HIGH",
"baseScore": 7.5,
"baseSeverity": "HIGH",
"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "REQUIRED",
"vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H",
"version": "3.1"
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"threats": [
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"details": "Important"
}
],
"title": "firefox: thunderbird: Memory safety bugs fixed in Firefox ESR 140.9, Thunderbird ESR 140.9, Firefox 149 and Thunderbird 149"
},
{
"cve": "CVE-2026-4721",
"cwe": {
"id": "CWE-825",
"name": "Expired Pointer Dereference"
},
"discovery_date": "2026-03-24T13:01:21.825225+00:00",
"ids": [
{
"system_name": "Red Hat Bugzilla ID",
"text": "2450711"
}
],
"notes": [
{
"category": "description",
"text": "A flaw was found in Firefox and Thunderbird. The Mozilla Foundation\u0027s Security Advisory describes the following issue:\nMemory safety bugs present in Firefox ESR 115.33, Firefox ESR 140.8, Thunderbird ESR 140.8, Firefox 148 and Thunderbird 148. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code.",
"title": "Vulnerability description"
},
{
"category": "summary",
"text": "firefox: thunderbird: Memory safety bugs fixed in Firefox ESR 115.34, Firefox ESR 140.9, Thunderbird ESR 140.9, Firefox 149 and Thunderbird 149",
"title": "Vulnerability summary"
},
{
"category": "other",
"text": "Red Hat Product Security rates the severity of this flaw as determined by the Mozilla Foundation Security Advisory.",
"title": "Statement"
},
{
"category": "general",
"text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
"title": "CVSS score applicability"
}
],
"product_status": {
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"references": [
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"summary": "Canonical URL",
"url": "https://access.redhat.com/security/cve/CVE-2026-4721"
},
{
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"summary": "RHBZ#2450711",
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2450711"
},
{
"category": "external",
"summary": "https://www.cve.org/CVERecord?id=CVE-2026-4721",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-4721"
},
{
"category": "external",
"summary": "https://nvd.nist.gov/vuln/detail/CVE-2026-4721",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-4721"
},
{
"category": "external",
"summary": "https://www.mozilla.org/security/advisories/mfsa2026-22/#CVE-2026-4721",
"url": "https://www.mozilla.org/security/advisories/mfsa2026-22/#CVE-2026-4721"
},
{
"category": "external",
"summary": "https://www.mozilla.org/security/advisories/mfsa2026-24/#CVE-2026-4721",
"url": "https://www.mozilla.org/security/advisories/mfsa2026-24/#CVE-2026-4721"
}
],
"release_date": "2026-03-24T12:30:44.312000+00:00",
"remediations": [
{
"category": "vendor_fix",
"date": "2026-04-13T12:47:34+00:00",
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}
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{
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"attackVector": "NETWORK",
"availabilityImpact": "HIGH",
"baseScore": 7.5,
"baseSeverity": "HIGH",
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"integrityImpact": "HIGH",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "REQUIRED",
"vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H",
"version": "3.1"
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"threats": [
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"details": "Important"
}
],
"title": "firefox: thunderbird: Memory safety bugs fixed in Firefox ESR 115.34, Firefox ESR 140.9, Thunderbird ESR 140.9, Firefox 149 and Thunderbird 149"
}
]
}
RHSA-2026:8289
Vulnerability from csaf_redhat - Published: 2026-04-15 10:48 - Updated: 2026-04-28 18:40Summary
Red Hat Security Advisory: thunderbird security update
Severity
Important
Notes
Topic: An update for thunderbird is now available for Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support, Red Hat Enterprise Linux 8.6 Update Services for SAP Solutions, and Red Hat Enterprise Linux 8.6 Telecommunications Update Service.
Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.
Details: Mozilla Thunderbird is a standalone mail and newsgroup client.
Security Fix(es):
* firefox: thunderbird: Use-after-free in the JavaScript Engine component (CVE-2026-4701)
* firefox: thunderbird: Memory safety bugs fixed in Firefox ESR 115.34, Firefox ESR 140.9, Thunderbird ESR 140.9, Firefox 149 and Thunderbird 149 (CVE-2026-4721)
* firefox: thunderbird: Privilege escalation in the Netmonitor component (CVE-2026-4717)
* firefox: thunderbird: Sandbox escape due to use-after-free in the Disability Access APIs component (CVE-2026-4688)
* firefox: thunderbird: Incorrect boundary conditions in the Graphics: Canvas2D component (CVE-2026-4706)
* firefox: thunderbird: Incorrect boundary conditions in the Audio/Video: Web Codecs component (CVE-2026-4695)
* firefox: thunderbird: Sandbox escape due to incorrect boundary conditions, integer overflow in the XPCOM component (CVE-2026-4689)
* firefox: thunderbird: JIT miscompilation in the JavaScript Engine: JIT component (CVE-2026-4698)
* firefox: thunderbird: Incorrect boundary conditions, uninitialized memory in the JavaScript Engine component (CVE-2026-4716)
* firefox: thunderbird: Race condition, use-after-free in the Graphics: WebRender component (CVE-2026-4684)
* firefox: thunderbird: Undefined behavior in the WebRTC: Signaling component (CVE-2026-4705)
* firefox: thunderbird: Uninitialized memory in the Graphics: Canvas2D component (CVE-2026-4715)
* firefox: thunderbird: Incorrect boundary conditions in the Graphics: Canvas2D component (CVE-2026-4685)
* firefox: thunderbird: Incorrect boundary conditions in the Audio/Video component (CVE-2026-4714)
* firefox: thunderbird: Incorrect boundary conditions in the Audio/Video: GMP component (CVE-2026-4709)
* firefox: thunderbird: Incorrect boundary conditions in the Audio/Video component (CVE-2026-4710)
* firefox: thunderbird: Information disclosure in the Widget: Cocoa component (CVE-2026-4712)
* firefox: thunderbird: Incorrect boundary conditions in the Audio/Video: Web Codecs component (CVE-2026-4697)
* firefox: thunderbird: Incorrect boundary conditions in the Graphics component (CVE-2026-4713)
* firefox: thunderbird: Sandbox escape due to incorrect boundary conditions, integer overflow in the XPCOM component (CVE-2026-4690)
* firefox: thunderbird: Use-after-free in the Widget: Cocoa component (CVE-2026-4711)
* firefox: thunderbird: Incorrect boundary conditions in the Graphics: Canvas2D component (CVE-2026-4686)
* firefox: thunderbird: Incorrect boundary conditions in the Graphics component (CVE-2026-4708)
* firefox: thunderbird: Use-after-free in the CSS Parsing and Computation component (CVE-2026-4691)
* firefox: thunderbird: Incorrect boundary conditions in the Layout: Text and Fonts component (CVE-2026-4699)
* firefox: thunderbird: Use-after-free in the Layout: Text and Fonts component (CVE-2026-4696)
* firefox: thunderbird: Incorrect boundary conditions in the Audio/Video: Playback component (CVE-2026-4693)
* firefox: thunderbird: Undefined behavior in the WebRTC: Signaling component (CVE-2026-4718)
* firefox: thunderbird: JIT miscompilation in the JavaScript Engine component (CVE-2026-4702)
* firefox: thunderbird: Incorrect boundary conditions in the Graphics: Text component (CVE-2026-4719)
* firefox: thunderbird: Incorrect boundary conditions, integer overflow in the Graphics component (CVE-2026-4694)
* firefox: thunderbird: Sandbox escape in the Responsive Design Mode component (CVE-2026-4692)
* firefox: thunderbird: Memory safety bugs fixed in Firefox ESR 140.9, Thunderbird ESR 140.9, Firefox 149 and Thunderbird 149 (CVE-2026-4720)
* firefox: thunderbird: Mitigation bypass in the Networking: HTTP component (CVE-2026-4700)
* firefox: thunderbird: Incorrect boundary conditions in the Graphics: Canvas2D component (CVE-2026-4707)
* firefox: thunderbird: Denial-of-service in the WebRTC: Signaling component (CVE-2026-4704)
* firefox: thunderbird: Sandbox escape due to incorrect boundary conditions in the Telemetry component (CVE-2026-4687)
* thunderbird: Out of bounds read in IMAP parsing (CVE-2026-4371)
* thunderbird: Spoofing issue in Thunderbird (CVE-2026-3889)
For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.
Terms of Use: This content is licensed under the Creative Commons Attribution 4.0 International License (https://creativecommons.org/licenses/by/4.0/). If you distribute this content, or a modified version of it, you must provide attribution to Red Hat Inc. and provide a link to the original.
A flaw was found in Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: Spoofing issue in Thunderbird
5.4 (Medium)
Vendor Fix
For details on how to apply this update, which includes the changes described in this advisory, refer to:
https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2026:8289
Workaround
Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability.
Product status
Fixed
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AppStream-8.6.0.Z.TUS:thunderbird-0:140.9.0-1.el8_6.src
AppStream-8.6.0.Z.TUS:thunderbird-0:140.9.0-1.el8_6.x86_64
AppStream-8.6.0.Z.TUS:thunderbird-debuginfo-0:140.9.0-1.el8_6.x86_64
AppStream-8.6.0.Z.TUS:thunderbird-debugsource-0:140.9.0-1.el8_6.x86_64
Threats
Impact
Low
A flaw was found in Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: A malicious mail server could send malformed strings with negative lengths, causing the parser to read memory outside the buffer. If a mail server or connection to a mail server were compromised, an attacker could cause the parser to malfunction, potentially crashing Thunderbird or leaking sensitive data.
8.2 (High)
Vendor Fix
For details on how to apply this update, which includes the changes described in this advisory, refer to:
https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2026:8289
Workaround
Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability.
Product status
Fixed
AppStream-8.6.0.Z.AUS:thunderbird-0:140.9.0-1.el8_6.src
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AppStream-8.6.0.Z.E4S:thunderbird-debuginfo-0:140.9.0-1.el8_6.aarch64
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AppStream-8.6.0.Z.E4S:thunderbird-debugsource-0:140.9.0-1.el8_6.aarch64
AppStream-8.6.0.Z.E4S:thunderbird-debugsource-0:140.9.0-1.el8_6.ppc64le
AppStream-8.6.0.Z.E4S:thunderbird-debugsource-0:140.9.0-1.el8_6.s390x
AppStream-8.6.0.Z.E4S:thunderbird-debugsource-0:140.9.0-1.el8_6.x86_64
AppStream-8.6.0.Z.TUS:thunderbird-0:140.9.0-1.el8_6.src
AppStream-8.6.0.Z.TUS:thunderbird-0:140.9.0-1.el8_6.x86_64
AppStream-8.6.0.Z.TUS:thunderbird-debuginfo-0:140.9.0-1.el8_6.x86_64
AppStream-8.6.0.Z.TUS:thunderbird-debugsource-0:140.9.0-1.el8_6.x86_64
Threats
Impact
Important
A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: Race condition, use-after-free in the Graphics: WebRender component
7.5 (High)
Vendor Fix
For details on how to apply this update, which includes the changes described in this advisory, refer to:
https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2026:8289
Product status
Fixed
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AppStream-8.6.0.Z.AUS:thunderbird-0:140.9.0-1.el8_6.x86_64
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AppStream-8.6.0.Z.E4S:thunderbird-0:140.9.0-1.el8_6.aarch64
AppStream-8.6.0.Z.E4S:thunderbird-0:140.9.0-1.el8_6.ppc64le
AppStream-8.6.0.Z.E4S:thunderbird-0:140.9.0-1.el8_6.s390x
AppStream-8.6.0.Z.E4S:thunderbird-0:140.9.0-1.el8_6.src
AppStream-8.6.0.Z.E4S:thunderbird-0:140.9.0-1.el8_6.x86_64
AppStream-8.6.0.Z.E4S:thunderbird-debuginfo-0:140.9.0-1.el8_6.aarch64
AppStream-8.6.0.Z.E4S:thunderbird-debuginfo-0:140.9.0-1.el8_6.ppc64le
AppStream-8.6.0.Z.E4S:thunderbird-debuginfo-0:140.9.0-1.el8_6.s390x
AppStream-8.6.0.Z.E4S:thunderbird-debuginfo-0:140.9.0-1.el8_6.x86_64
AppStream-8.6.0.Z.E4S:thunderbird-debugsource-0:140.9.0-1.el8_6.aarch64
AppStream-8.6.0.Z.E4S:thunderbird-debugsource-0:140.9.0-1.el8_6.ppc64le
AppStream-8.6.0.Z.E4S:thunderbird-debugsource-0:140.9.0-1.el8_6.s390x
AppStream-8.6.0.Z.E4S:thunderbird-debugsource-0:140.9.0-1.el8_6.x86_64
AppStream-8.6.0.Z.TUS:thunderbird-0:140.9.0-1.el8_6.src
AppStream-8.6.0.Z.TUS:thunderbird-0:140.9.0-1.el8_6.x86_64
AppStream-8.6.0.Z.TUS:thunderbird-debuginfo-0:140.9.0-1.el8_6.x86_64
AppStream-8.6.0.Z.TUS:thunderbird-debugsource-0:140.9.0-1.el8_6.x86_64
Threats
Impact
Important
A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: Incorrect boundary conditions in the Graphics: Canvas2D component
7.5 (High)
Vendor Fix
For details on how to apply this update, which includes the changes described in this advisory, refer to:
https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2026:8289
Product status
Fixed
AppStream-8.6.0.Z.AUS:thunderbird-0:140.9.0-1.el8_6.src
AppStream-8.6.0.Z.AUS:thunderbird-0:140.9.0-1.el8_6.x86_64
AppStream-8.6.0.Z.AUS:thunderbird-debuginfo-0:140.9.0-1.el8_6.x86_64
AppStream-8.6.0.Z.AUS:thunderbird-debugsource-0:140.9.0-1.el8_6.x86_64
AppStream-8.6.0.Z.E4S:thunderbird-0:140.9.0-1.el8_6.aarch64
AppStream-8.6.0.Z.E4S:thunderbird-0:140.9.0-1.el8_6.ppc64le
AppStream-8.6.0.Z.E4S:thunderbird-0:140.9.0-1.el8_6.s390x
AppStream-8.6.0.Z.E4S:thunderbird-0:140.9.0-1.el8_6.src
AppStream-8.6.0.Z.E4S:thunderbird-0:140.9.0-1.el8_6.x86_64
AppStream-8.6.0.Z.E4S:thunderbird-debuginfo-0:140.9.0-1.el8_6.aarch64
AppStream-8.6.0.Z.E4S:thunderbird-debuginfo-0:140.9.0-1.el8_6.ppc64le
AppStream-8.6.0.Z.E4S:thunderbird-debuginfo-0:140.9.0-1.el8_6.s390x
AppStream-8.6.0.Z.E4S:thunderbird-debuginfo-0:140.9.0-1.el8_6.x86_64
AppStream-8.6.0.Z.E4S:thunderbird-debugsource-0:140.9.0-1.el8_6.aarch64
AppStream-8.6.0.Z.E4S:thunderbird-debugsource-0:140.9.0-1.el8_6.ppc64le
AppStream-8.6.0.Z.E4S:thunderbird-debugsource-0:140.9.0-1.el8_6.s390x
AppStream-8.6.0.Z.E4S:thunderbird-debugsource-0:140.9.0-1.el8_6.x86_64
AppStream-8.6.0.Z.TUS:thunderbird-0:140.9.0-1.el8_6.src
AppStream-8.6.0.Z.TUS:thunderbird-0:140.9.0-1.el8_6.x86_64
AppStream-8.6.0.Z.TUS:thunderbird-debuginfo-0:140.9.0-1.el8_6.x86_64
AppStream-8.6.0.Z.TUS:thunderbird-debugsource-0:140.9.0-1.el8_6.x86_64
Threats
Impact
Important
A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: Incorrect boundary conditions in the Graphics: Canvas2D component
7.5 (High)
Vendor Fix
For details on how to apply this update, which includes the changes described in this advisory, refer to:
https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2026:8289
Product status
Fixed
AppStream-8.6.0.Z.AUS:thunderbird-0:140.9.0-1.el8_6.src
AppStream-8.6.0.Z.AUS:thunderbird-0:140.9.0-1.el8_6.x86_64
AppStream-8.6.0.Z.AUS:thunderbird-debuginfo-0:140.9.0-1.el8_6.x86_64
AppStream-8.6.0.Z.AUS:thunderbird-debugsource-0:140.9.0-1.el8_6.x86_64
AppStream-8.6.0.Z.E4S:thunderbird-0:140.9.0-1.el8_6.aarch64
AppStream-8.6.0.Z.E4S:thunderbird-0:140.9.0-1.el8_6.ppc64le
AppStream-8.6.0.Z.E4S:thunderbird-0:140.9.0-1.el8_6.s390x
AppStream-8.6.0.Z.E4S:thunderbird-0:140.9.0-1.el8_6.src
AppStream-8.6.0.Z.E4S:thunderbird-0:140.9.0-1.el8_6.x86_64
AppStream-8.6.0.Z.E4S:thunderbird-debuginfo-0:140.9.0-1.el8_6.aarch64
AppStream-8.6.0.Z.E4S:thunderbird-debuginfo-0:140.9.0-1.el8_6.ppc64le
AppStream-8.6.0.Z.E4S:thunderbird-debuginfo-0:140.9.0-1.el8_6.s390x
AppStream-8.6.0.Z.E4S:thunderbird-debuginfo-0:140.9.0-1.el8_6.x86_64
AppStream-8.6.0.Z.E4S:thunderbird-debugsource-0:140.9.0-1.el8_6.aarch64
AppStream-8.6.0.Z.E4S:thunderbird-debugsource-0:140.9.0-1.el8_6.ppc64le
AppStream-8.6.0.Z.E4S:thunderbird-debugsource-0:140.9.0-1.el8_6.s390x
AppStream-8.6.0.Z.E4S:thunderbird-debugsource-0:140.9.0-1.el8_6.x86_64
AppStream-8.6.0.Z.TUS:thunderbird-0:140.9.0-1.el8_6.src
AppStream-8.6.0.Z.TUS:thunderbird-0:140.9.0-1.el8_6.x86_64
AppStream-8.6.0.Z.TUS:thunderbird-debuginfo-0:140.9.0-1.el8_6.x86_64
AppStream-8.6.0.Z.TUS:thunderbird-debugsource-0:140.9.0-1.el8_6.x86_64
Threats
Impact
Important
A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: Sandbox escape due to incorrect boundary conditions in the Telemetry component
7.5 (High)
Vendor Fix
For details on how to apply this update, which includes the changes described in this advisory, refer to:
https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2026:8289
Product status
Fixed
AppStream-8.6.0.Z.AUS:thunderbird-0:140.9.0-1.el8_6.src
AppStream-8.6.0.Z.AUS:thunderbird-0:140.9.0-1.el8_6.x86_64
AppStream-8.6.0.Z.AUS:thunderbird-debuginfo-0:140.9.0-1.el8_6.x86_64
AppStream-8.6.0.Z.AUS:thunderbird-debugsource-0:140.9.0-1.el8_6.x86_64
AppStream-8.6.0.Z.E4S:thunderbird-0:140.9.0-1.el8_6.aarch64
AppStream-8.6.0.Z.E4S:thunderbird-0:140.9.0-1.el8_6.ppc64le
AppStream-8.6.0.Z.E4S:thunderbird-0:140.9.0-1.el8_6.s390x
AppStream-8.6.0.Z.E4S:thunderbird-0:140.9.0-1.el8_6.src
AppStream-8.6.0.Z.E4S:thunderbird-0:140.9.0-1.el8_6.x86_64
AppStream-8.6.0.Z.E4S:thunderbird-debuginfo-0:140.9.0-1.el8_6.aarch64
AppStream-8.6.0.Z.E4S:thunderbird-debuginfo-0:140.9.0-1.el8_6.ppc64le
AppStream-8.6.0.Z.E4S:thunderbird-debuginfo-0:140.9.0-1.el8_6.s390x
AppStream-8.6.0.Z.E4S:thunderbird-debuginfo-0:140.9.0-1.el8_6.x86_64
AppStream-8.6.0.Z.E4S:thunderbird-debugsource-0:140.9.0-1.el8_6.aarch64
AppStream-8.6.0.Z.E4S:thunderbird-debugsource-0:140.9.0-1.el8_6.ppc64le
AppStream-8.6.0.Z.E4S:thunderbird-debugsource-0:140.9.0-1.el8_6.s390x
AppStream-8.6.0.Z.E4S:thunderbird-debugsource-0:140.9.0-1.el8_6.x86_64
AppStream-8.6.0.Z.TUS:thunderbird-0:140.9.0-1.el8_6.src
AppStream-8.6.0.Z.TUS:thunderbird-0:140.9.0-1.el8_6.x86_64
AppStream-8.6.0.Z.TUS:thunderbird-debuginfo-0:140.9.0-1.el8_6.x86_64
AppStream-8.6.0.Z.TUS:thunderbird-debugsource-0:140.9.0-1.el8_6.x86_64
Threats
Impact
Important
A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: Sandbox escape due to use-after-free in the Disability Access APIs component
7.5 (High)
Vendor Fix
For details on how to apply this update, which includes the changes described in this advisory, refer to:
https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2026:8289
Product status
Fixed
AppStream-8.6.0.Z.AUS:thunderbird-0:140.9.0-1.el8_6.src
AppStream-8.6.0.Z.AUS:thunderbird-0:140.9.0-1.el8_6.x86_64
AppStream-8.6.0.Z.AUS:thunderbird-debuginfo-0:140.9.0-1.el8_6.x86_64
AppStream-8.6.0.Z.AUS:thunderbird-debugsource-0:140.9.0-1.el8_6.x86_64
AppStream-8.6.0.Z.E4S:thunderbird-0:140.9.0-1.el8_6.aarch64
AppStream-8.6.0.Z.E4S:thunderbird-0:140.9.0-1.el8_6.ppc64le
AppStream-8.6.0.Z.E4S:thunderbird-0:140.9.0-1.el8_6.s390x
AppStream-8.6.0.Z.E4S:thunderbird-0:140.9.0-1.el8_6.src
AppStream-8.6.0.Z.E4S:thunderbird-0:140.9.0-1.el8_6.x86_64
AppStream-8.6.0.Z.E4S:thunderbird-debuginfo-0:140.9.0-1.el8_6.aarch64
AppStream-8.6.0.Z.E4S:thunderbird-debuginfo-0:140.9.0-1.el8_6.ppc64le
AppStream-8.6.0.Z.E4S:thunderbird-debuginfo-0:140.9.0-1.el8_6.s390x
AppStream-8.6.0.Z.E4S:thunderbird-debuginfo-0:140.9.0-1.el8_6.x86_64
AppStream-8.6.0.Z.E4S:thunderbird-debugsource-0:140.9.0-1.el8_6.aarch64
AppStream-8.6.0.Z.E4S:thunderbird-debugsource-0:140.9.0-1.el8_6.ppc64le
AppStream-8.6.0.Z.E4S:thunderbird-debugsource-0:140.9.0-1.el8_6.s390x
AppStream-8.6.0.Z.E4S:thunderbird-debugsource-0:140.9.0-1.el8_6.x86_64
AppStream-8.6.0.Z.TUS:thunderbird-0:140.9.0-1.el8_6.src
AppStream-8.6.0.Z.TUS:thunderbird-0:140.9.0-1.el8_6.x86_64
AppStream-8.6.0.Z.TUS:thunderbird-debuginfo-0:140.9.0-1.el8_6.x86_64
AppStream-8.6.0.Z.TUS:thunderbird-debugsource-0:140.9.0-1.el8_6.x86_64
Threats
Impact
Important
A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: Sandbox escape due to incorrect boundary conditions, integer overflow in the XPCOM component
7.5 (High)
Vendor Fix
For details on how to apply this update, which includes the changes described in this advisory, refer to:
https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2026:8289
Product status
Fixed
AppStream-8.6.0.Z.AUS:thunderbird-0:140.9.0-1.el8_6.src
AppStream-8.6.0.Z.AUS:thunderbird-0:140.9.0-1.el8_6.x86_64
AppStream-8.6.0.Z.AUS:thunderbird-debuginfo-0:140.9.0-1.el8_6.x86_64
AppStream-8.6.0.Z.AUS:thunderbird-debugsource-0:140.9.0-1.el8_6.x86_64
AppStream-8.6.0.Z.E4S:thunderbird-0:140.9.0-1.el8_6.aarch64
AppStream-8.6.0.Z.E4S:thunderbird-0:140.9.0-1.el8_6.ppc64le
AppStream-8.6.0.Z.E4S:thunderbird-0:140.9.0-1.el8_6.s390x
AppStream-8.6.0.Z.E4S:thunderbird-0:140.9.0-1.el8_6.src
AppStream-8.6.0.Z.E4S:thunderbird-0:140.9.0-1.el8_6.x86_64
AppStream-8.6.0.Z.E4S:thunderbird-debuginfo-0:140.9.0-1.el8_6.aarch64
AppStream-8.6.0.Z.E4S:thunderbird-debuginfo-0:140.9.0-1.el8_6.ppc64le
AppStream-8.6.0.Z.E4S:thunderbird-debuginfo-0:140.9.0-1.el8_6.s390x
AppStream-8.6.0.Z.E4S:thunderbird-debuginfo-0:140.9.0-1.el8_6.x86_64
AppStream-8.6.0.Z.E4S:thunderbird-debugsource-0:140.9.0-1.el8_6.aarch64
AppStream-8.6.0.Z.E4S:thunderbird-debugsource-0:140.9.0-1.el8_6.ppc64le
AppStream-8.6.0.Z.E4S:thunderbird-debugsource-0:140.9.0-1.el8_6.s390x
AppStream-8.6.0.Z.E4S:thunderbird-debugsource-0:140.9.0-1.el8_6.x86_64
AppStream-8.6.0.Z.TUS:thunderbird-0:140.9.0-1.el8_6.src
AppStream-8.6.0.Z.TUS:thunderbird-0:140.9.0-1.el8_6.x86_64
AppStream-8.6.0.Z.TUS:thunderbird-debuginfo-0:140.9.0-1.el8_6.x86_64
AppStream-8.6.0.Z.TUS:thunderbird-debugsource-0:140.9.0-1.el8_6.x86_64
Threats
Impact
Important
A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: Sandbox escape due to incorrect boundary conditions, integer overflow in the XPCOM component
7.5 (High)
Vendor Fix
For details on how to apply this update, which includes the changes described in this advisory, refer to:
https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2026:8289
Product status
Fixed
AppStream-8.6.0.Z.AUS:thunderbird-0:140.9.0-1.el8_6.src
AppStream-8.6.0.Z.AUS:thunderbird-0:140.9.0-1.el8_6.x86_64
AppStream-8.6.0.Z.AUS:thunderbird-debuginfo-0:140.9.0-1.el8_6.x86_64
AppStream-8.6.0.Z.AUS:thunderbird-debugsource-0:140.9.0-1.el8_6.x86_64
AppStream-8.6.0.Z.E4S:thunderbird-0:140.9.0-1.el8_6.aarch64
AppStream-8.6.0.Z.E4S:thunderbird-0:140.9.0-1.el8_6.ppc64le
AppStream-8.6.0.Z.E4S:thunderbird-0:140.9.0-1.el8_6.s390x
AppStream-8.6.0.Z.E4S:thunderbird-0:140.9.0-1.el8_6.src
AppStream-8.6.0.Z.E4S:thunderbird-0:140.9.0-1.el8_6.x86_64
AppStream-8.6.0.Z.E4S:thunderbird-debuginfo-0:140.9.0-1.el8_6.aarch64
AppStream-8.6.0.Z.E4S:thunderbird-debuginfo-0:140.9.0-1.el8_6.ppc64le
AppStream-8.6.0.Z.E4S:thunderbird-debuginfo-0:140.9.0-1.el8_6.s390x
AppStream-8.6.0.Z.E4S:thunderbird-debuginfo-0:140.9.0-1.el8_6.x86_64
AppStream-8.6.0.Z.E4S:thunderbird-debugsource-0:140.9.0-1.el8_6.aarch64
AppStream-8.6.0.Z.E4S:thunderbird-debugsource-0:140.9.0-1.el8_6.ppc64le
AppStream-8.6.0.Z.E4S:thunderbird-debugsource-0:140.9.0-1.el8_6.s390x
AppStream-8.6.0.Z.E4S:thunderbird-debugsource-0:140.9.0-1.el8_6.x86_64
AppStream-8.6.0.Z.TUS:thunderbird-0:140.9.0-1.el8_6.src
AppStream-8.6.0.Z.TUS:thunderbird-0:140.9.0-1.el8_6.x86_64
AppStream-8.6.0.Z.TUS:thunderbird-debuginfo-0:140.9.0-1.el8_6.x86_64
AppStream-8.6.0.Z.TUS:thunderbird-debugsource-0:140.9.0-1.el8_6.x86_64
Threats
Impact
Important
A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: Use-after-free in the CSS Parsing and Computation component
7.5 (High)
Vendor Fix
For details on how to apply this update, which includes the changes described in this advisory, refer to:
https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2026:8289
Product status
Fixed
AppStream-8.6.0.Z.AUS:thunderbird-0:140.9.0-1.el8_6.src
AppStream-8.6.0.Z.AUS:thunderbird-0:140.9.0-1.el8_6.x86_64
AppStream-8.6.0.Z.AUS:thunderbird-debuginfo-0:140.9.0-1.el8_6.x86_64
AppStream-8.6.0.Z.AUS:thunderbird-debugsource-0:140.9.0-1.el8_6.x86_64
AppStream-8.6.0.Z.E4S:thunderbird-0:140.9.0-1.el8_6.aarch64
AppStream-8.6.0.Z.E4S:thunderbird-0:140.9.0-1.el8_6.ppc64le
AppStream-8.6.0.Z.E4S:thunderbird-0:140.9.0-1.el8_6.s390x
AppStream-8.6.0.Z.E4S:thunderbird-0:140.9.0-1.el8_6.src
AppStream-8.6.0.Z.E4S:thunderbird-0:140.9.0-1.el8_6.x86_64
AppStream-8.6.0.Z.E4S:thunderbird-debuginfo-0:140.9.0-1.el8_6.aarch64
AppStream-8.6.0.Z.E4S:thunderbird-debuginfo-0:140.9.0-1.el8_6.ppc64le
AppStream-8.6.0.Z.E4S:thunderbird-debuginfo-0:140.9.0-1.el8_6.s390x
AppStream-8.6.0.Z.E4S:thunderbird-debuginfo-0:140.9.0-1.el8_6.x86_64
AppStream-8.6.0.Z.E4S:thunderbird-debugsource-0:140.9.0-1.el8_6.aarch64
AppStream-8.6.0.Z.E4S:thunderbird-debugsource-0:140.9.0-1.el8_6.ppc64le
AppStream-8.6.0.Z.E4S:thunderbird-debugsource-0:140.9.0-1.el8_6.s390x
AppStream-8.6.0.Z.E4S:thunderbird-debugsource-0:140.9.0-1.el8_6.x86_64
AppStream-8.6.0.Z.TUS:thunderbird-0:140.9.0-1.el8_6.src
AppStream-8.6.0.Z.TUS:thunderbird-0:140.9.0-1.el8_6.x86_64
AppStream-8.6.0.Z.TUS:thunderbird-debuginfo-0:140.9.0-1.el8_6.x86_64
AppStream-8.6.0.Z.TUS:thunderbird-debugsource-0:140.9.0-1.el8_6.x86_64
Threats
Impact
Important
A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: Sandbox escape in the Responsive Design Mode component
7.5 (High)
Vendor Fix
For details on how to apply this update, which includes the changes described in this advisory, refer to:
https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2026:8289
Product status
Fixed
AppStream-8.6.0.Z.AUS:thunderbird-0:140.9.0-1.el8_6.src
AppStream-8.6.0.Z.AUS:thunderbird-0:140.9.0-1.el8_6.x86_64
AppStream-8.6.0.Z.AUS:thunderbird-debuginfo-0:140.9.0-1.el8_6.x86_64
AppStream-8.6.0.Z.AUS:thunderbird-debugsource-0:140.9.0-1.el8_6.x86_64
AppStream-8.6.0.Z.E4S:thunderbird-0:140.9.0-1.el8_6.aarch64
AppStream-8.6.0.Z.E4S:thunderbird-0:140.9.0-1.el8_6.ppc64le
AppStream-8.6.0.Z.E4S:thunderbird-0:140.9.0-1.el8_6.s390x
AppStream-8.6.0.Z.E4S:thunderbird-0:140.9.0-1.el8_6.src
AppStream-8.6.0.Z.E4S:thunderbird-0:140.9.0-1.el8_6.x86_64
AppStream-8.6.0.Z.E4S:thunderbird-debuginfo-0:140.9.0-1.el8_6.aarch64
AppStream-8.6.0.Z.E4S:thunderbird-debuginfo-0:140.9.0-1.el8_6.ppc64le
AppStream-8.6.0.Z.E4S:thunderbird-debuginfo-0:140.9.0-1.el8_6.s390x
AppStream-8.6.0.Z.E4S:thunderbird-debuginfo-0:140.9.0-1.el8_6.x86_64
AppStream-8.6.0.Z.E4S:thunderbird-debugsource-0:140.9.0-1.el8_6.aarch64
AppStream-8.6.0.Z.E4S:thunderbird-debugsource-0:140.9.0-1.el8_6.ppc64le
AppStream-8.6.0.Z.E4S:thunderbird-debugsource-0:140.9.0-1.el8_6.s390x
AppStream-8.6.0.Z.E4S:thunderbird-debugsource-0:140.9.0-1.el8_6.x86_64
AppStream-8.6.0.Z.TUS:thunderbird-0:140.9.0-1.el8_6.src
AppStream-8.6.0.Z.TUS:thunderbird-0:140.9.0-1.el8_6.x86_64
AppStream-8.6.0.Z.TUS:thunderbird-debuginfo-0:140.9.0-1.el8_6.x86_64
AppStream-8.6.0.Z.TUS:thunderbird-debugsource-0:140.9.0-1.el8_6.x86_64
Threats
Impact
Important
A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: Incorrect boundary conditions in the Audio/Video: Playback component
7.5 (High)
Vendor Fix
For details on how to apply this update, which includes the changes described in this advisory, refer to:
https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2026:8289
Product status
Fixed
AppStream-8.6.0.Z.AUS:thunderbird-0:140.9.0-1.el8_6.src
AppStream-8.6.0.Z.AUS:thunderbird-0:140.9.0-1.el8_6.x86_64
AppStream-8.6.0.Z.AUS:thunderbird-debuginfo-0:140.9.0-1.el8_6.x86_64
AppStream-8.6.0.Z.AUS:thunderbird-debugsource-0:140.9.0-1.el8_6.x86_64
AppStream-8.6.0.Z.E4S:thunderbird-0:140.9.0-1.el8_6.aarch64
AppStream-8.6.0.Z.E4S:thunderbird-0:140.9.0-1.el8_6.ppc64le
AppStream-8.6.0.Z.E4S:thunderbird-0:140.9.0-1.el8_6.s390x
AppStream-8.6.0.Z.E4S:thunderbird-0:140.9.0-1.el8_6.src
AppStream-8.6.0.Z.E4S:thunderbird-0:140.9.0-1.el8_6.x86_64
AppStream-8.6.0.Z.E4S:thunderbird-debuginfo-0:140.9.0-1.el8_6.aarch64
AppStream-8.6.0.Z.E4S:thunderbird-debuginfo-0:140.9.0-1.el8_6.ppc64le
AppStream-8.6.0.Z.E4S:thunderbird-debuginfo-0:140.9.0-1.el8_6.s390x
AppStream-8.6.0.Z.E4S:thunderbird-debuginfo-0:140.9.0-1.el8_6.x86_64
AppStream-8.6.0.Z.E4S:thunderbird-debugsource-0:140.9.0-1.el8_6.aarch64
AppStream-8.6.0.Z.E4S:thunderbird-debugsource-0:140.9.0-1.el8_6.ppc64le
AppStream-8.6.0.Z.E4S:thunderbird-debugsource-0:140.9.0-1.el8_6.s390x
AppStream-8.6.0.Z.E4S:thunderbird-debugsource-0:140.9.0-1.el8_6.x86_64
AppStream-8.6.0.Z.TUS:thunderbird-0:140.9.0-1.el8_6.src
AppStream-8.6.0.Z.TUS:thunderbird-0:140.9.0-1.el8_6.x86_64
AppStream-8.6.0.Z.TUS:thunderbird-debuginfo-0:140.9.0-1.el8_6.x86_64
AppStream-8.6.0.Z.TUS:thunderbird-debugsource-0:140.9.0-1.el8_6.x86_64
Threats
Impact
Important
A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: Incorrect boundary conditions, integer overflow in the Graphics component
7.5 (High)
Vendor Fix
For details on how to apply this update, which includes the changes described in this advisory, refer to:
https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2026:8289
Product status
Fixed
AppStream-8.6.0.Z.AUS:thunderbird-0:140.9.0-1.el8_6.src
AppStream-8.6.0.Z.AUS:thunderbird-0:140.9.0-1.el8_6.x86_64
AppStream-8.6.0.Z.AUS:thunderbird-debuginfo-0:140.9.0-1.el8_6.x86_64
AppStream-8.6.0.Z.AUS:thunderbird-debugsource-0:140.9.0-1.el8_6.x86_64
AppStream-8.6.0.Z.E4S:thunderbird-0:140.9.0-1.el8_6.aarch64
AppStream-8.6.0.Z.E4S:thunderbird-0:140.9.0-1.el8_6.ppc64le
AppStream-8.6.0.Z.E4S:thunderbird-0:140.9.0-1.el8_6.s390x
AppStream-8.6.0.Z.E4S:thunderbird-0:140.9.0-1.el8_6.src
AppStream-8.6.0.Z.E4S:thunderbird-0:140.9.0-1.el8_6.x86_64
AppStream-8.6.0.Z.E4S:thunderbird-debuginfo-0:140.9.0-1.el8_6.aarch64
AppStream-8.6.0.Z.E4S:thunderbird-debuginfo-0:140.9.0-1.el8_6.ppc64le
AppStream-8.6.0.Z.E4S:thunderbird-debuginfo-0:140.9.0-1.el8_6.s390x
AppStream-8.6.0.Z.E4S:thunderbird-debuginfo-0:140.9.0-1.el8_6.x86_64
AppStream-8.6.0.Z.E4S:thunderbird-debugsource-0:140.9.0-1.el8_6.aarch64
AppStream-8.6.0.Z.E4S:thunderbird-debugsource-0:140.9.0-1.el8_6.ppc64le
AppStream-8.6.0.Z.E4S:thunderbird-debugsource-0:140.9.0-1.el8_6.s390x
AppStream-8.6.0.Z.E4S:thunderbird-debugsource-0:140.9.0-1.el8_6.x86_64
AppStream-8.6.0.Z.TUS:thunderbird-0:140.9.0-1.el8_6.src
AppStream-8.6.0.Z.TUS:thunderbird-0:140.9.0-1.el8_6.x86_64
AppStream-8.6.0.Z.TUS:thunderbird-debuginfo-0:140.9.0-1.el8_6.x86_64
AppStream-8.6.0.Z.TUS:thunderbird-debugsource-0:140.9.0-1.el8_6.x86_64
Threats
Impact
Important
A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: Incorrect boundary conditions in the Audio/Video: Web Codecs component
7.5 (High)
Vendor Fix
For details on how to apply this update, which includes the changes described in this advisory, refer to:
https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2026:8289
Product status
Fixed
AppStream-8.6.0.Z.AUS:thunderbird-0:140.9.0-1.el8_6.src
AppStream-8.6.0.Z.AUS:thunderbird-0:140.9.0-1.el8_6.x86_64
AppStream-8.6.0.Z.AUS:thunderbird-debuginfo-0:140.9.0-1.el8_6.x86_64
AppStream-8.6.0.Z.AUS:thunderbird-debugsource-0:140.9.0-1.el8_6.x86_64
AppStream-8.6.0.Z.E4S:thunderbird-0:140.9.0-1.el8_6.aarch64
AppStream-8.6.0.Z.E4S:thunderbird-0:140.9.0-1.el8_6.ppc64le
AppStream-8.6.0.Z.E4S:thunderbird-0:140.9.0-1.el8_6.s390x
AppStream-8.6.0.Z.E4S:thunderbird-0:140.9.0-1.el8_6.src
AppStream-8.6.0.Z.E4S:thunderbird-0:140.9.0-1.el8_6.x86_64
AppStream-8.6.0.Z.E4S:thunderbird-debuginfo-0:140.9.0-1.el8_6.aarch64
AppStream-8.6.0.Z.E4S:thunderbird-debuginfo-0:140.9.0-1.el8_6.ppc64le
AppStream-8.6.0.Z.E4S:thunderbird-debuginfo-0:140.9.0-1.el8_6.s390x
AppStream-8.6.0.Z.E4S:thunderbird-debuginfo-0:140.9.0-1.el8_6.x86_64
AppStream-8.6.0.Z.E4S:thunderbird-debugsource-0:140.9.0-1.el8_6.aarch64
AppStream-8.6.0.Z.E4S:thunderbird-debugsource-0:140.9.0-1.el8_6.ppc64le
AppStream-8.6.0.Z.E4S:thunderbird-debugsource-0:140.9.0-1.el8_6.s390x
AppStream-8.6.0.Z.E4S:thunderbird-debugsource-0:140.9.0-1.el8_6.x86_64
AppStream-8.6.0.Z.TUS:thunderbird-0:140.9.0-1.el8_6.src
AppStream-8.6.0.Z.TUS:thunderbird-0:140.9.0-1.el8_6.x86_64
AppStream-8.6.0.Z.TUS:thunderbird-debuginfo-0:140.9.0-1.el8_6.x86_64
AppStream-8.6.0.Z.TUS:thunderbird-debugsource-0:140.9.0-1.el8_6.x86_64
Threats
Impact
Important
A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: Use-after-free in the Layout: Text and Fonts component
7.5 (High)
Vendor Fix
For details on how to apply this update, which includes the changes described in this advisory, refer to:
https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2026:8289
Product status
Fixed
AppStream-8.6.0.Z.AUS:thunderbird-0:140.9.0-1.el8_6.src
AppStream-8.6.0.Z.AUS:thunderbird-0:140.9.0-1.el8_6.x86_64
AppStream-8.6.0.Z.AUS:thunderbird-debuginfo-0:140.9.0-1.el8_6.x86_64
AppStream-8.6.0.Z.AUS:thunderbird-debugsource-0:140.9.0-1.el8_6.x86_64
AppStream-8.6.0.Z.E4S:thunderbird-0:140.9.0-1.el8_6.aarch64
AppStream-8.6.0.Z.E4S:thunderbird-0:140.9.0-1.el8_6.ppc64le
AppStream-8.6.0.Z.E4S:thunderbird-0:140.9.0-1.el8_6.s390x
AppStream-8.6.0.Z.E4S:thunderbird-0:140.9.0-1.el8_6.src
AppStream-8.6.0.Z.E4S:thunderbird-0:140.9.0-1.el8_6.x86_64
AppStream-8.6.0.Z.E4S:thunderbird-debuginfo-0:140.9.0-1.el8_6.aarch64
AppStream-8.6.0.Z.E4S:thunderbird-debuginfo-0:140.9.0-1.el8_6.ppc64le
AppStream-8.6.0.Z.E4S:thunderbird-debuginfo-0:140.9.0-1.el8_6.s390x
AppStream-8.6.0.Z.E4S:thunderbird-debuginfo-0:140.9.0-1.el8_6.x86_64
AppStream-8.6.0.Z.E4S:thunderbird-debugsource-0:140.9.0-1.el8_6.aarch64
AppStream-8.6.0.Z.E4S:thunderbird-debugsource-0:140.9.0-1.el8_6.ppc64le
AppStream-8.6.0.Z.E4S:thunderbird-debugsource-0:140.9.0-1.el8_6.s390x
AppStream-8.6.0.Z.E4S:thunderbird-debugsource-0:140.9.0-1.el8_6.x86_64
AppStream-8.6.0.Z.TUS:thunderbird-0:140.9.0-1.el8_6.src
AppStream-8.6.0.Z.TUS:thunderbird-0:140.9.0-1.el8_6.x86_64
AppStream-8.6.0.Z.TUS:thunderbird-debuginfo-0:140.9.0-1.el8_6.x86_64
AppStream-8.6.0.Z.TUS:thunderbird-debugsource-0:140.9.0-1.el8_6.x86_64
Threats
Impact
Important
A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: Incorrect boundary conditions in the Audio/Video: Web Codecs component
7.5 (High)
Vendor Fix
For details on how to apply this update, which includes the changes described in this advisory, refer to:
https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2026:8289
Product status
Fixed
AppStream-8.6.0.Z.AUS:thunderbird-0:140.9.0-1.el8_6.src
AppStream-8.6.0.Z.AUS:thunderbird-0:140.9.0-1.el8_6.x86_64
AppStream-8.6.0.Z.AUS:thunderbird-debuginfo-0:140.9.0-1.el8_6.x86_64
AppStream-8.6.0.Z.AUS:thunderbird-debugsource-0:140.9.0-1.el8_6.x86_64
AppStream-8.6.0.Z.E4S:thunderbird-0:140.9.0-1.el8_6.aarch64
AppStream-8.6.0.Z.E4S:thunderbird-0:140.9.0-1.el8_6.ppc64le
AppStream-8.6.0.Z.E4S:thunderbird-0:140.9.0-1.el8_6.s390x
AppStream-8.6.0.Z.E4S:thunderbird-0:140.9.0-1.el8_6.src
AppStream-8.6.0.Z.E4S:thunderbird-0:140.9.0-1.el8_6.x86_64
AppStream-8.6.0.Z.E4S:thunderbird-debuginfo-0:140.9.0-1.el8_6.aarch64
AppStream-8.6.0.Z.E4S:thunderbird-debuginfo-0:140.9.0-1.el8_6.ppc64le
AppStream-8.6.0.Z.E4S:thunderbird-debuginfo-0:140.9.0-1.el8_6.s390x
AppStream-8.6.0.Z.E4S:thunderbird-debuginfo-0:140.9.0-1.el8_6.x86_64
AppStream-8.6.0.Z.E4S:thunderbird-debugsource-0:140.9.0-1.el8_6.aarch64
AppStream-8.6.0.Z.E4S:thunderbird-debugsource-0:140.9.0-1.el8_6.ppc64le
AppStream-8.6.0.Z.E4S:thunderbird-debugsource-0:140.9.0-1.el8_6.s390x
AppStream-8.6.0.Z.E4S:thunderbird-debugsource-0:140.9.0-1.el8_6.x86_64
AppStream-8.6.0.Z.TUS:thunderbird-0:140.9.0-1.el8_6.src
AppStream-8.6.0.Z.TUS:thunderbird-0:140.9.0-1.el8_6.x86_64
AppStream-8.6.0.Z.TUS:thunderbird-debuginfo-0:140.9.0-1.el8_6.x86_64
AppStream-8.6.0.Z.TUS:thunderbird-debugsource-0:140.9.0-1.el8_6.x86_64
Threats
Impact
Important
A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: JIT miscompilation in the JavaScript Engine: JIT component
7.5 (High)
Vendor Fix
For details on how to apply this update, which includes the changes described in this advisory, refer to:
https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2026:8289
Product status
Fixed
AppStream-8.6.0.Z.AUS:thunderbird-0:140.9.0-1.el8_6.src
AppStream-8.6.0.Z.AUS:thunderbird-0:140.9.0-1.el8_6.x86_64
AppStream-8.6.0.Z.AUS:thunderbird-debuginfo-0:140.9.0-1.el8_6.x86_64
AppStream-8.6.0.Z.AUS:thunderbird-debugsource-0:140.9.0-1.el8_6.x86_64
AppStream-8.6.0.Z.E4S:thunderbird-0:140.9.0-1.el8_6.aarch64
AppStream-8.6.0.Z.E4S:thunderbird-0:140.9.0-1.el8_6.ppc64le
AppStream-8.6.0.Z.E4S:thunderbird-0:140.9.0-1.el8_6.s390x
AppStream-8.6.0.Z.E4S:thunderbird-0:140.9.0-1.el8_6.src
AppStream-8.6.0.Z.E4S:thunderbird-0:140.9.0-1.el8_6.x86_64
AppStream-8.6.0.Z.E4S:thunderbird-debuginfo-0:140.9.0-1.el8_6.aarch64
AppStream-8.6.0.Z.E4S:thunderbird-debuginfo-0:140.9.0-1.el8_6.ppc64le
AppStream-8.6.0.Z.E4S:thunderbird-debuginfo-0:140.9.0-1.el8_6.s390x
AppStream-8.6.0.Z.E4S:thunderbird-debuginfo-0:140.9.0-1.el8_6.x86_64
AppStream-8.6.0.Z.E4S:thunderbird-debugsource-0:140.9.0-1.el8_6.aarch64
AppStream-8.6.0.Z.E4S:thunderbird-debugsource-0:140.9.0-1.el8_6.ppc64le
AppStream-8.6.0.Z.E4S:thunderbird-debugsource-0:140.9.0-1.el8_6.s390x
AppStream-8.6.0.Z.E4S:thunderbird-debugsource-0:140.9.0-1.el8_6.x86_64
AppStream-8.6.0.Z.TUS:thunderbird-0:140.9.0-1.el8_6.src
AppStream-8.6.0.Z.TUS:thunderbird-0:140.9.0-1.el8_6.x86_64
AppStream-8.6.0.Z.TUS:thunderbird-debuginfo-0:140.9.0-1.el8_6.x86_64
AppStream-8.6.0.Z.TUS:thunderbird-debugsource-0:140.9.0-1.el8_6.x86_64
Threats
Impact
Important
A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: Incorrect boundary conditions in the Layout: Text and Fonts component
7.5 (High)
Vendor Fix
For details on how to apply this update, which includes the changes described in this advisory, refer to:
https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2026:8289
Product status
Fixed
AppStream-8.6.0.Z.AUS:thunderbird-0:140.9.0-1.el8_6.src
AppStream-8.6.0.Z.AUS:thunderbird-0:140.9.0-1.el8_6.x86_64
AppStream-8.6.0.Z.AUS:thunderbird-debuginfo-0:140.9.0-1.el8_6.x86_64
AppStream-8.6.0.Z.AUS:thunderbird-debugsource-0:140.9.0-1.el8_6.x86_64
AppStream-8.6.0.Z.E4S:thunderbird-0:140.9.0-1.el8_6.aarch64
AppStream-8.6.0.Z.E4S:thunderbird-0:140.9.0-1.el8_6.ppc64le
AppStream-8.6.0.Z.E4S:thunderbird-0:140.9.0-1.el8_6.s390x
AppStream-8.6.0.Z.E4S:thunderbird-0:140.9.0-1.el8_6.src
AppStream-8.6.0.Z.E4S:thunderbird-0:140.9.0-1.el8_6.x86_64
AppStream-8.6.0.Z.E4S:thunderbird-debuginfo-0:140.9.0-1.el8_6.aarch64
AppStream-8.6.0.Z.E4S:thunderbird-debuginfo-0:140.9.0-1.el8_6.ppc64le
AppStream-8.6.0.Z.E4S:thunderbird-debuginfo-0:140.9.0-1.el8_6.s390x
AppStream-8.6.0.Z.E4S:thunderbird-debuginfo-0:140.9.0-1.el8_6.x86_64
AppStream-8.6.0.Z.E4S:thunderbird-debugsource-0:140.9.0-1.el8_6.aarch64
AppStream-8.6.0.Z.E4S:thunderbird-debugsource-0:140.9.0-1.el8_6.ppc64le
AppStream-8.6.0.Z.E4S:thunderbird-debugsource-0:140.9.0-1.el8_6.s390x
AppStream-8.6.0.Z.E4S:thunderbird-debugsource-0:140.9.0-1.el8_6.x86_64
AppStream-8.6.0.Z.TUS:thunderbird-0:140.9.0-1.el8_6.src
AppStream-8.6.0.Z.TUS:thunderbird-0:140.9.0-1.el8_6.x86_64
AppStream-8.6.0.Z.TUS:thunderbird-debuginfo-0:140.9.0-1.el8_6.x86_64
AppStream-8.6.0.Z.TUS:thunderbird-debugsource-0:140.9.0-1.el8_6.x86_64
Threats
Impact
Important
A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: Mitigation bypass in the Networking: HTTP component
7.5 (High)
Vendor Fix
For details on how to apply this update, which includes the changes described in this advisory, refer to:
https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2026:8289
Product status
Fixed
AppStream-8.6.0.Z.AUS:thunderbird-0:140.9.0-1.el8_6.src
AppStream-8.6.0.Z.AUS:thunderbird-0:140.9.0-1.el8_6.x86_64
AppStream-8.6.0.Z.AUS:thunderbird-debuginfo-0:140.9.0-1.el8_6.x86_64
AppStream-8.6.0.Z.AUS:thunderbird-debugsource-0:140.9.0-1.el8_6.x86_64
AppStream-8.6.0.Z.E4S:thunderbird-0:140.9.0-1.el8_6.aarch64
AppStream-8.6.0.Z.E4S:thunderbird-0:140.9.0-1.el8_6.ppc64le
AppStream-8.6.0.Z.E4S:thunderbird-0:140.9.0-1.el8_6.s390x
AppStream-8.6.0.Z.E4S:thunderbird-0:140.9.0-1.el8_6.src
AppStream-8.6.0.Z.E4S:thunderbird-0:140.9.0-1.el8_6.x86_64
AppStream-8.6.0.Z.E4S:thunderbird-debuginfo-0:140.9.0-1.el8_6.aarch64
AppStream-8.6.0.Z.E4S:thunderbird-debuginfo-0:140.9.0-1.el8_6.ppc64le
AppStream-8.6.0.Z.E4S:thunderbird-debuginfo-0:140.9.0-1.el8_6.s390x
AppStream-8.6.0.Z.E4S:thunderbird-debuginfo-0:140.9.0-1.el8_6.x86_64
AppStream-8.6.0.Z.E4S:thunderbird-debugsource-0:140.9.0-1.el8_6.aarch64
AppStream-8.6.0.Z.E4S:thunderbird-debugsource-0:140.9.0-1.el8_6.ppc64le
AppStream-8.6.0.Z.E4S:thunderbird-debugsource-0:140.9.0-1.el8_6.s390x
AppStream-8.6.0.Z.E4S:thunderbird-debugsource-0:140.9.0-1.el8_6.x86_64
AppStream-8.6.0.Z.TUS:thunderbird-0:140.9.0-1.el8_6.src
AppStream-8.6.0.Z.TUS:thunderbird-0:140.9.0-1.el8_6.x86_64
AppStream-8.6.0.Z.TUS:thunderbird-debuginfo-0:140.9.0-1.el8_6.x86_64
AppStream-8.6.0.Z.TUS:thunderbird-debugsource-0:140.9.0-1.el8_6.x86_64
Threats
Impact
Important
A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: Use-after-free in the JavaScript Engine component
6.1 (Medium)
Vendor Fix
For details on how to apply this update, which includes the changes described in this advisory, refer to:
https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2026:8289
Product status
Fixed
AppStream-8.6.0.Z.AUS:thunderbird-0:140.9.0-1.el8_6.src
AppStream-8.6.0.Z.AUS:thunderbird-0:140.9.0-1.el8_6.x86_64
AppStream-8.6.0.Z.AUS:thunderbird-debuginfo-0:140.9.0-1.el8_6.x86_64
AppStream-8.6.0.Z.AUS:thunderbird-debugsource-0:140.9.0-1.el8_6.x86_64
AppStream-8.6.0.Z.E4S:thunderbird-0:140.9.0-1.el8_6.aarch64
AppStream-8.6.0.Z.E4S:thunderbird-0:140.9.0-1.el8_6.ppc64le
AppStream-8.6.0.Z.E4S:thunderbird-0:140.9.0-1.el8_6.s390x
AppStream-8.6.0.Z.E4S:thunderbird-0:140.9.0-1.el8_6.src
AppStream-8.6.0.Z.E4S:thunderbird-0:140.9.0-1.el8_6.x86_64
AppStream-8.6.0.Z.E4S:thunderbird-debuginfo-0:140.9.0-1.el8_6.aarch64
AppStream-8.6.0.Z.E4S:thunderbird-debuginfo-0:140.9.0-1.el8_6.ppc64le
AppStream-8.6.0.Z.E4S:thunderbird-debuginfo-0:140.9.0-1.el8_6.s390x
AppStream-8.6.0.Z.E4S:thunderbird-debuginfo-0:140.9.0-1.el8_6.x86_64
AppStream-8.6.0.Z.E4S:thunderbird-debugsource-0:140.9.0-1.el8_6.aarch64
AppStream-8.6.0.Z.E4S:thunderbird-debugsource-0:140.9.0-1.el8_6.ppc64le
AppStream-8.6.0.Z.E4S:thunderbird-debugsource-0:140.9.0-1.el8_6.s390x
AppStream-8.6.0.Z.E4S:thunderbird-debugsource-0:140.9.0-1.el8_6.x86_64
AppStream-8.6.0.Z.TUS:thunderbird-0:140.9.0-1.el8_6.src
AppStream-8.6.0.Z.TUS:thunderbird-0:140.9.0-1.el8_6.x86_64
AppStream-8.6.0.Z.TUS:thunderbird-debuginfo-0:140.9.0-1.el8_6.x86_64
AppStream-8.6.0.Z.TUS:thunderbird-debugsource-0:140.9.0-1.el8_6.x86_64
Threats
Impact
Moderate
A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: JIT miscompilation in the JavaScript Engine component
6.1 (Medium)
Vendor Fix
For details on how to apply this update, which includes the changes described in this advisory, refer to:
https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2026:8289
Product status
Fixed
AppStream-8.6.0.Z.AUS:thunderbird-0:140.9.0-1.el8_6.src
AppStream-8.6.0.Z.AUS:thunderbird-0:140.9.0-1.el8_6.x86_64
AppStream-8.6.0.Z.AUS:thunderbird-debuginfo-0:140.9.0-1.el8_6.x86_64
AppStream-8.6.0.Z.AUS:thunderbird-debugsource-0:140.9.0-1.el8_6.x86_64
AppStream-8.6.0.Z.E4S:thunderbird-0:140.9.0-1.el8_6.aarch64
AppStream-8.6.0.Z.E4S:thunderbird-0:140.9.0-1.el8_6.ppc64le
AppStream-8.6.0.Z.E4S:thunderbird-0:140.9.0-1.el8_6.s390x
AppStream-8.6.0.Z.E4S:thunderbird-0:140.9.0-1.el8_6.src
AppStream-8.6.0.Z.E4S:thunderbird-0:140.9.0-1.el8_6.x86_64
AppStream-8.6.0.Z.E4S:thunderbird-debuginfo-0:140.9.0-1.el8_6.aarch64
AppStream-8.6.0.Z.E4S:thunderbird-debuginfo-0:140.9.0-1.el8_6.ppc64le
AppStream-8.6.0.Z.E4S:thunderbird-debuginfo-0:140.9.0-1.el8_6.s390x
AppStream-8.6.0.Z.E4S:thunderbird-debuginfo-0:140.9.0-1.el8_6.x86_64
AppStream-8.6.0.Z.E4S:thunderbird-debugsource-0:140.9.0-1.el8_6.aarch64
AppStream-8.6.0.Z.E4S:thunderbird-debugsource-0:140.9.0-1.el8_6.ppc64le
AppStream-8.6.0.Z.E4S:thunderbird-debugsource-0:140.9.0-1.el8_6.s390x
AppStream-8.6.0.Z.E4S:thunderbird-debugsource-0:140.9.0-1.el8_6.x86_64
AppStream-8.6.0.Z.TUS:thunderbird-0:140.9.0-1.el8_6.src
AppStream-8.6.0.Z.TUS:thunderbird-0:140.9.0-1.el8_6.x86_64
AppStream-8.6.0.Z.TUS:thunderbird-debuginfo-0:140.9.0-1.el8_6.x86_64
AppStream-8.6.0.Z.TUS:thunderbird-debugsource-0:140.9.0-1.el8_6.x86_64
Threats
Impact
Moderate
A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: Denial-of-service in the WebRTC: Signaling component
7.5 (High)
Vendor Fix
For details on how to apply this update, which includes the changes described in this advisory, refer to:
https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2026:8289
Product status
Fixed
AppStream-8.6.0.Z.AUS:thunderbird-0:140.9.0-1.el8_6.src
AppStream-8.6.0.Z.AUS:thunderbird-0:140.9.0-1.el8_6.x86_64
AppStream-8.6.0.Z.AUS:thunderbird-debuginfo-0:140.9.0-1.el8_6.x86_64
AppStream-8.6.0.Z.AUS:thunderbird-debugsource-0:140.9.0-1.el8_6.x86_64
AppStream-8.6.0.Z.E4S:thunderbird-0:140.9.0-1.el8_6.aarch64
AppStream-8.6.0.Z.E4S:thunderbird-0:140.9.0-1.el8_6.ppc64le
AppStream-8.6.0.Z.E4S:thunderbird-0:140.9.0-1.el8_6.s390x
AppStream-8.6.0.Z.E4S:thunderbird-0:140.9.0-1.el8_6.src
AppStream-8.6.0.Z.E4S:thunderbird-0:140.9.0-1.el8_6.x86_64
AppStream-8.6.0.Z.E4S:thunderbird-debuginfo-0:140.9.0-1.el8_6.aarch64
AppStream-8.6.0.Z.E4S:thunderbird-debuginfo-0:140.9.0-1.el8_6.ppc64le
AppStream-8.6.0.Z.E4S:thunderbird-debuginfo-0:140.9.0-1.el8_6.s390x
AppStream-8.6.0.Z.E4S:thunderbird-debuginfo-0:140.9.0-1.el8_6.x86_64
AppStream-8.6.0.Z.E4S:thunderbird-debugsource-0:140.9.0-1.el8_6.aarch64
AppStream-8.6.0.Z.E4S:thunderbird-debugsource-0:140.9.0-1.el8_6.ppc64le
AppStream-8.6.0.Z.E4S:thunderbird-debugsource-0:140.9.0-1.el8_6.s390x
AppStream-8.6.0.Z.E4S:thunderbird-debugsource-0:140.9.0-1.el8_6.x86_64
AppStream-8.6.0.Z.TUS:thunderbird-0:140.9.0-1.el8_6.src
AppStream-8.6.0.Z.TUS:thunderbird-0:140.9.0-1.el8_6.x86_64
AppStream-8.6.0.Z.TUS:thunderbird-debuginfo-0:140.9.0-1.el8_6.x86_64
AppStream-8.6.0.Z.TUS:thunderbird-debugsource-0:140.9.0-1.el8_6.x86_64
Threats
Impact
Moderate
A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: Undefined behavior in the WebRTC: Signaling component
6.5 (Medium)
Vendor Fix
For details on how to apply this update, which includes the changes described in this advisory, refer to:
https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2026:8289
Product status
Fixed
AppStream-8.6.0.Z.AUS:thunderbird-0:140.9.0-1.el8_6.src
AppStream-8.6.0.Z.AUS:thunderbird-0:140.9.0-1.el8_6.x86_64
AppStream-8.6.0.Z.AUS:thunderbird-debuginfo-0:140.9.0-1.el8_6.x86_64
AppStream-8.6.0.Z.AUS:thunderbird-debugsource-0:140.9.0-1.el8_6.x86_64
AppStream-8.6.0.Z.E4S:thunderbird-0:140.9.0-1.el8_6.aarch64
AppStream-8.6.0.Z.E4S:thunderbird-0:140.9.0-1.el8_6.ppc64le
AppStream-8.6.0.Z.E4S:thunderbird-0:140.9.0-1.el8_6.s390x
AppStream-8.6.0.Z.E4S:thunderbird-0:140.9.0-1.el8_6.src
AppStream-8.6.0.Z.E4S:thunderbird-0:140.9.0-1.el8_6.x86_64
AppStream-8.6.0.Z.E4S:thunderbird-debuginfo-0:140.9.0-1.el8_6.aarch64
AppStream-8.6.0.Z.E4S:thunderbird-debuginfo-0:140.9.0-1.el8_6.ppc64le
AppStream-8.6.0.Z.E4S:thunderbird-debuginfo-0:140.9.0-1.el8_6.s390x
AppStream-8.6.0.Z.E4S:thunderbird-debuginfo-0:140.9.0-1.el8_6.x86_64
AppStream-8.6.0.Z.E4S:thunderbird-debugsource-0:140.9.0-1.el8_6.aarch64
AppStream-8.6.0.Z.E4S:thunderbird-debugsource-0:140.9.0-1.el8_6.ppc64le
AppStream-8.6.0.Z.E4S:thunderbird-debugsource-0:140.9.0-1.el8_6.s390x
AppStream-8.6.0.Z.E4S:thunderbird-debugsource-0:140.9.0-1.el8_6.x86_64
AppStream-8.6.0.Z.TUS:thunderbird-0:140.9.0-1.el8_6.src
AppStream-8.6.0.Z.TUS:thunderbird-0:140.9.0-1.el8_6.x86_64
AppStream-8.6.0.Z.TUS:thunderbird-debuginfo-0:140.9.0-1.el8_6.x86_64
AppStream-8.6.0.Z.TUS:thunderbird-debugsource-0:140.9.0-1.el8_6.x86_64
Threats
Impact
Moderate
A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: Incorrect boundary conditions in the Graphics: Canvas2D component
6.1 (Medium)
Vendor Fix
For details on how to apply this update, which includes the changes described in this advisory, refer to:
https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2026:8289
Product status
Fixed
AppStream-8.6.0.Z.AUS:thunderbird-0:140.9.0-1.el8_6.src
AppStream-8.6.0.Z.AUS:thunderbird-0:140.9.0-1.el8_6.x86_64
AppStream-8.6.0.Z.AUS:thunderbird-debuginfo-0:140.9.0-1.el8_6.x86_64
AppStream-8.6.0.Z.AUS:thunderbird-debugsource-0:140.9.0-1.el8_6.x86_64
AppStream-8.6.0.Z.E4S:thunderbird-0:140.9.0-1.el8_6.aarch64
AppStream-8.6.0.Z.E4S:thunderbird-0:140.9.0-1.el8_6.ppc64le
AppStream-8.6.0.Z.E4S:thunderbird-0:140.9.0-1.el8_6.s390x
AppStream-8.6.0.Z.E4S:thunderbird-0:140.9.0-1.el8_6.src
AppStream-8.6.0.Z.E4S:thunderbird-0:140.9.0-1.el8_6.x86_64
AppStream-8.6.0.Z.E4S:thunderbird-debuginfo-0:140.9.0-1.el8_6.aarch64
AppStream-8.6.0.Z.E4S:thunderbird-debuginfo-0:140.9.0-1.el8_6.ppc64le
AppStream-8.6.0.Z.E4S:thunderbird-debuginfo-0:140.9.0-1.el8_6.s390x
AppStream-8.6.0.Z.E4S:thunderbird-debuginfo-0:140.9.0-1.el8_6.x86_64
AppStream-8.6.0.Z.E4S:thunderbird-debugsource-0:140.9.0-1.el8_6.aarch64
AppStream-8.6.0.Z.E4S:thunderbird-debugsource-0:140.9.0-1.el8_6.ppc64le
AppStream-8.6.0.Z.E4S:thunderbird-debugsource-0:140.9.0-1.el8_6.s390x
AppStream-8.6.0.Z.E4S:thunderbird-debugsource-0:140.9.0-1.el8_6.x86_64
AppStream-8.6.0.Z.TUS:thunderbird-0:140.9.0-1.el8_6.src
AppStream-8.6.0.Z.TUS:thunderbird-0:140.9.0-1.el8_6.x86_64
AppStream-8.6.0.Z.TUS:thunderbird-debuginfo-0:140.9.0-1.el8_6.x86_64
AppStream-8.6.0.Z.TUS:thunderbird-debugsource-0:140.9.0-1.el8_6.x86_64
Threats
Impact
Moderate
A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: Incorrect boundary conditions in the Graphics: Canvas2D component
6.1 (Medium)
Vendor Fix
For details on how to apply this update, which includes the changes described in this advisory, refer to:
https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2026:8289
Product status
Fixed
AppStream-8.6.0.Z.AUS:thunderbird-0:140.9.0-1.el8_6.src
AppStream-8.6.0.Z.AUS:thunderbird-0:140.9.0-1.el8_6.x86_64
AppStream-8.6.0.Z.AUS:thunderbird-debuginfo-0:140.9.0-1.el8_6.x86_64
AppStream-8.6.0.Z.AUS:thunderbird-debugsource-0:140.9.0-1.el8_6.x86_64
AppStream-8.6.0.Z.E4S:thunderbird-0:140.9.0-1.el8_6.aarch64
AppStream-8.6.0.Z.E4S:thunderbird-0:140.9.0-1.el8_6.ppc64le
AppStream-8.6.0.Z.E4S:thunderbird-0:140.9.0-1.el8_6.s390x
AppStream-8.6.0.Z.E4S:thunderbird-0:140.9.0-1.el8_6.src
AppStream-8.6.0.Z.E4S:thunderbird-0:140.9.0-1.el8_6.x86_64
AppStream-8.6.0.Z.E4S:thunderbird-debuginfo-0:140.9.0-1.el8_6.aarch64
AppStream-8.6.0.Z.E4S:thunderbird-debuginfo-0:140.9.0-1.el8_6.ppc64le
AppStream-8.6.0.Z.E4S:thunderbird-debuginfo-0:140.9.0-1.el8_6.s390x
AppStream-8.6.0.Z.E4S:thunderbird-debuginfo-0:140.9.0-1.el8_6.x86_64
AppStream-8.6.0.Z.E4S:thunderbird-debugsource-0:140.9.0-1.el8_6.aarch64
AppStream-8.6.0.Z.E4S:thunderbird-debugsource-0:140.9.0-1.el8_6.ppc64le
AppStream-8.6.0.Z.E4S:thunderbird-debugsource-0:140.9.0-1.el8_6.s390x
AppStream-8.6.0.Z.E4S:thunderbird-debugsource-0:140.9.0-1.el8_6.x86_64
AppStream-8.6.0.Z.TUS:thunderbird-0:140.9.0-1.el8_6.src
AppStream-8.6.0.Z.TUS:thunderbird-0:140.9.0-1.el8_6.x86_64
AppStream-8.6.0.Z.TUS:thunderbird-debuginfo-0:140.9.0-1.el8_6.x86_64
AppStream-8.6.0.Z.TUS:thunderbird-debugsource-0:140.9.0-1.el8_6.x86_64
Threats
Impact
Moderate
A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: Incorrect boundary conditions in the Graphics component
6.1 (Medium)
Vendor Fix
For details on how to apply this update, which includes the changes described in this advisory, refer to:
https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2026:8289
Product status
Fixed
AppStream-8.6.0.Z.AUS:thunderbird-0:140.9.0-1.el8_6.src
AppStream-8.6.0.Z.AUS:thunderbird-0:140.9.0-1.el8_6.x86_64
AppStream-8.6.0.Z.AUS:thunderbird-debuginfo-0:140.9.0-1.el8_6.x86_64
AppStream-8.6.0.Z.AUS:thunderbird-debugsource-0:140.9.0-1.el8_6.x86_64
AppStream-8.6.0.Z.E4S:thunderbird-0:140.9.0-1.el8_6.aarch64
AppStream-8.6.0.Z.E4S:thunderbird-0:140.9.0-1.el8_6.ppc64le
AppStream-8.6.0.Z.E4S:thunderbird-0:140.9.0-1.el8_6.s390x
AppStream-8.6.0.Z.E4S:thunderbird-0:140.9.0-1.el8_6.src
AppStream-8.6.0.Z.E4S:thunderbird-0:140.9.0-1.el8_6.x86_64
AppStream-8.6.0.Z.E4S:thunderbird-debuginfo-0:140.9.0-1.el8_6.aarch64
AppStream-8.6.0.Z.E4S:thunderbird-debuginfo-0:140.9.0-1.el8_6.ppc64le
AppStream-8.6.0.Z.E4S:thunderbird-debuginfo-0:140.9.0-1.el8_6.s390x
AppStream-8.6.0.Z.E4S:thunderbird-debuginfo-0:140.9.0-1.el8_6.x86_64
AppStream-8.6.0.Z.E4S:thunderbird-debugsource-0:140.9.0-1.el8_6.aarch64
AppStream-8.6.0.Z.E4S:thunderbird-debugsource-0:140.9.0-1.el8_6.ppc64le
AppStream-8.6.0.Z.E4S:thunderbird-debugsource-0:140.9.0-1.el8_6.s390x
AppStream-8.6.0.Z.E4S:thunderbird-debugsource-0:140.9.0-1.el8_6.x86_64
AppStream-8.6.0.Z.TUS:thunderbird-0:140.9.0-1.el8_6.src
AppStream-8.6.0.Z.TUS:thunderbird-0:140.9.0-1.el8_6.x86_64
AppStream-8.6.0.Z.TUS:thunderbird-debuginfo-0:140.9.0-1.el8_6.x86_64
AppStream-8.6.0.Z.TUS:thunderbird-debugsource-0:140.9.0-1.el8_6.x86_64
Threats
Impact
Moderate
A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: Incorrect boundary conditions in the Audio/Video: GMP component
6.1 (Medium)
Vendor Fix
For details on how to apply this update, which includes the changes described in this advisory, refer to:
https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2026:8289
Product status
Fixed
AppStream-8.6.0.Z.AUS:thunderbird-0:140.9.0-1.el8_6.src
AppStream-8.6.0.Z.AUS:thunderbird-0:140.9.0-1.el8_6.x86_64
AppStream-8.6.0.Z.AUS:thunderbird-debuginfo-0:140.9.0-1.el8_6.x86_64
AppStream-8.6.0.Z.AUS:thunderbird-debugsource-0:140.9.0-1.el8_6.x86_64
AppStream-8.6.0.Z.E4S:thunderbird-0:140.9.0-1.el8_6.aarch64
AppStream-8.6.0.Z.E4S:thunderbird-0:140.9.0-1.el8_6.ppc64le
AppStream-8.6.0.Z.E4S:thunderbird-0:140.9.0-1.el8_6.s390x
AppStream-8.6.0.Z.E4S:thunderbird-0:140.9.0-1.el8_6.src
AppStream-8.6.0.Z.E4S:thunderbird-0:140.9.0-1.el8_6.x86_64
AppStream-8.6.0.Z.E4S:thunderbird-debuginfo-0:140.9.0-1.el8_6.aarch64
AppStream-8.6.0.Z.E4S:thunderbird-debuginfo-0:140.9.0-1.el8_6.ppc64le
AppStream-8.6.0.Z.E4S:thunderbird-debuginfo-0:140.9.0-1.el8_6.s390x
AppStream-8.6.0.Z.E4S:thunderbird-debuginfo-0:140.9.0-1.el8_6.x86_64
AppStream-8.6.0.Z.E4S:thunderbird-debugsource-0:140.9.0-1.el8_6.aarch64
AppStream-8.6.0.Z.E4S:thunderbird-debugsource-0:140.9.0-1.el8_6.ppc64le
AppStream-8.6.0.Z.E4S:thunderbird-debugsource-0:140.9.0-1.el8_6.s390x
AppStream-8.6.0.Z.E4S:thunderbird-debugsource-0:140.9.0-1.el8_6.x86_64
AppStream-8.6.0.Z.TUS:thunderbird-0:140.9.0-1.el8_6.src
AppStream-8.6.0.Z.TUS:thunderbird-0:140.9.0-1.el8_6.x86_64
AppStream-8.6.0.Z.TUS:thunderbird-debuginfo-0:140.9.0-1.el8_6.x86_64
AppStream-8.6.0.Z.TUS:thunderbird-debugsource-0:140.9.0-1.el8_6.x86_64
Threats
Impact
Moderate
A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: Incorrect boundary conditions in the Audio/Video component
6.1 (Medium)
Vendor Fix
For details on how to apply this update, which includes the changes described in this advisory, refer to:
https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2026:8289
Product status
Fixed
AppStream-8.6.0.Z.AUS:thunderbird-0:140.9.0-1.el8_6.src
AppStream-8.6.0.Z.AUS:thunderbird-0:140.9.0-1.el8_6.x86_64
AppStream-8.6.0.Z.AUS:thunderbird-debuginfo-0:140.9.0-1.el8_6.x86_64
AppStream-8.6.0.Z.AUS:thunderbird-debugsource-0:140.9.0-1.el8_6.x86_64
AppStream-8.6.0.Z.E4S:thunderbird-0:140.9.0-1.el8_6.aarch64
AppStream-8.6.0.Z.E4S:thunderbird-0:140.9.0-1.el8_6.ppc64le
AppStream-8.6.0.Z.E4S:thunderbird-0:140.9.0-1.el8_6.s390x
AppStream-8.6.0.Z.E4S:thunderbird-0:140.9.0-1.el8_6.src
AppStream-8.6.0.Z.E4S:thunderbird-0:140.9.0-1.el8_6.x86_64
AppStream-8.6.0.Z.E4S:thunderbird-debuginfo-0:140.9.0-1.el8_6.aarch64
AppStream-8.6.0.Z.E4S:thunderbird-debuginfo-0:140.9.0-1.el8_6.ppc64le
AppStream-8.6.0.Z.E4S:thunderbird-debuginfo-0:140.9.0-1.el8_6.s390x
AppStream-8.6.0.Z.E4S:thunderbird-debuginfo-0:140.9.0-1.el8_6.x86_64
AppStream-8.6.0.Z.E4S:thunderbird-debugsource-0:140.9.0-1.el8_6.aarch64
AppStream-8.6.0.Z.E4S:thunderbird-debugsource-0:140.9.0-1.el8_6.ppc64le
AppStream-8.6.0.Z.E4S:thunderbird-debugsource-0:140.9.0-1.el8_6.s390x
AppStream-8.6.0.Z.E4S:thunderbird-debugsource-0:140.9.0-1.el8_6.x86_64
AppStream-8.6.0.Z.TUS:thunderbird-0:140.9.0-1.el8_6.src
AppStream-8.6.0.Z.TUS:thunderbird-0:140.9.0-1.el8_6.x86_64
AppStream-8.6.0.Z.TUS:thunderbird-debuginfo-0:140.9.0-1.el8_6.x86_64
AppStream-8.6.0.Z.TUS:thunderbird-debugsource-0:140.9.0-1.el8_6.x86_64
Threats
Impact
Moderate
A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: Use-after-free in the Widget: Cocoa component
6.1 (Medium)
Vendor Fix
For details on how to apply this update, which includes the changes described in this advisory, refer to:
https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2026:8289
Product status
Fixed
AppStream-8.6.0.Z.AUS:thunderbird-0:140.9.0-1.el8_6.src
AppStream-8.6.0.Z.AUS:thunderbird-0:140.9.0-1.el8_6.x86_64
AppStream-8.6.0.Z.AUS:thunderbird-debuginfo-0:140.9.0-1.el8_6.x86_64
AppStream-8.6.0.Z.AUS:thunderbird-debugsource-0:140.9.0-1.el8_6.x86_64
AppStream-8.6.0.Z.E4S:thunderbird-0:140.9.0-1.el8_6.aarch64
AppStream-8.6.0.Z.E4S:thunderbird-0:140.9.0-1.el8_6.ppc64le
AppStream-8.6.0.Z.E4S:thunderbird-0:140.9.0-1.el8_6.s390x
AppStream-8.6.0.Z.E4S:thunderbird-0:140.9.0-1.el8_6.src
AppStream-8.6.0.Z.E4S:thunderbird-0:140.9.0-1.el8_6.x86_64
AppStream-8.6.0.Z.E4S:thunderbird-debuginfo-0:140.9.0-1.el8_6.aarch64
AppStream-8.6.0.Z.E4S:thunderbird-debuginfo-0:140.9.0-1.el8_6.ppc64le
AppStream-8.6.0.Z.E4S:thunderbird-debuginfo-0:140.9.0-1.el8_6.s390x
AppStream-8.6.0.Z.E4S:thunderbird-debuginfo-0:140.9.0-1.el8_6.x86_64
AppStream-8.6.0.Z.E4S:thunderbird-debugsource-0:140.9.0-1.el8_6.aarch64
AppStream-8.6.0.Z.E4S:thunderbird-debugsource-0:140.9.0-1.el8_6.ppc64le
AppStream-8.6.0.Z.E4S:thunderbird-debugsource-0:140.9.0-1.el8_6.s390x
AppStream-8.6.0.Z.E4S:thunderbird-debugsource-0:140.9.0-1.el8_6.x86_64
AppStream-8.6.0.Z.TUS:thunderbird-0:140.9.0-1.el8_6.src
AppStream-8.6.0.Z.TUS:thunderbird-0:140.9.0-1.el8_6.x86_64
AppStream-8.6.0.Z.TUS:thunderbird-debuginfo-0:140.9.0-1.el8_6.x86_64
AppStream-8.6.0.Z.TUS:thunderbird-debugsource-0:140.9.0-1.el8_6.x86_64
Threats
Impact
Moderate
A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: Information disclosure in the Widget: Cocoa component
6.5 (Medium)
Vendor Fix
For details on how to apply this update, which includes the changes described in this advisory, refer to:
https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2026:8289
Product status
Fixed
AppStream-8.6.0.Z.AUS:thunderbird-0:140.9.0-1.el8_6.src
AppStream-8.6.0.Z.AUS:thunderbird-0:140.9.0-1.el8_6.x86_64
AppStream-8.6.0.Z.AUS:thunderbird-debuginfo-0:140.9.0-1.el8_6.x86_64
AppStream-8.6.0.Z.AUS:thunderbird-debugsource-0:140.9.0-1.el8_6.x86_64
AppStream-8.6.0.Z.E4S:thunderbird-0:140.9.0-1.el8_6.aarch64
AppStream-8.6.0.Z.E4S:thunderbird-0:140.9.0-1.el8_6.ppc64le
AppStream-8.6.0.Z.E4S:thunderbird-0:140.9.0-1.el8_6.s390x
AppStream-8.6.0.Z.E4S:thunderbird-0:140.9.0-1.el8_6.src
AppStream-8.6.0.Z.E4S:thunderbird-0:140.9.0-1.el8_6.x86_64
AppStream-8.6.0.Z.E4S:thunderbird-debuginfo-0:140.9.0-1.el8_6.aarch64
AppStream-8.6.0.Z.E4S:thunderbird-debuginfo-0:140.9.0-1.el8_6.ppc64le
AppStream-8.6.0.Z.E4S:thunderbird-debuginfo-0:140.9.0-1.el8_6.s390x
AppStream-8.6.0.Z.E4S:thunderbird-debuginfo-0:140.9.0-1.el8_6.x86_64
AppStream-8.6.0.Z.E4S:thunderbird-debugsource-0:140.9.0-1.el8_6.aarch64
AppStream-8.6.0.Z.E4S:thunderbird-debugsource-0:140.9.0-1.el8_6.ppc64le
AppStream-8.6.0.Z.E4S:thunderbird-debugsource-0:140.9.0-1.el8_6.s390x
AppStream-8.6.0.Z.E4S:thunderbird-debugsource-0:140.9.0-1.el8_6.x86_64
AppStream-8.6.0.Z.TUS:thunderbird-0:140.9.0-1.el8_6.src
AppStream-8.6.0.Z.TUS:thunderbird-0:140.9.0-1.el8_6.x86_64
AppStream-8.6.0.Z.TUS:thunderbird-debuginfo-0:140.9.0-1.el8_6.x86_64
AppStream-8.6.0.Z.TUS:thunderbird-debugsource-0:140.9.0-1.el8_6.x86_64
Threats
Impact
Moderate
A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: Incorrect boundary conditions in the Graphics component
6.1 (Medium)
Vendor Fix
For details on how to apply this update, which includes the changes described in this advisory, refer to:
https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2026:8289
Product status
Fixed
AppStream-8.6.0.Z.AUS:thunderbird-0:140.9.0-1.el8_6.src
AppStream-8.6.0.Z.AUS:thunderbird-0:140.9.0-1.el8_6.x86_64
AppStream-8.6.0.Z.AUS:thunderbird-debuginfo-0:140.9.0-1.el8_6.x86_64
AppStream-8.6.0.Z.AUS:thunderbird-debugsource-0:140.9.0-1.el8_6.x86_64
AppStream-8.6.0.Z.E4S:thunderbird-0:140.9.0-1.el8_6.aarch64
AppStream-8.6.0.Z.E4S:thunderbird-0:140.9.0-1.el8_6.ppc64le
AppStream-8.6.0.Z.E4S:thunderbird-0:140.9.0-1.el8_6.s390x
AppStream-8.6.0.Z.E4S:thunderbird-0:140.9.0-1.el8_6.src
AppStream-8.6.0.Z.E4S:thunderbird-0:140.9.0-1.el8_6.x86_64
AppStream-8.6.0.Z.E4S:thunderbird-debuginfo-0:140.9.0-1.el8_6.aarch64
AppStream-8.6.0.Z.E4S:thunderbird-debuginfo-0:140.9.0-1.el8_6.ppc64le
AppStream-8.6.0.Z.E4S:thunderbird-debuginfo-0:140.9.0-1.el8_6.s390x
AppStream-8.6.0.Z.E4S:thunderbird-debuginfo-0:140.9.0-1.el8_6.x86_64
AppStream-8.6.0.Z.E4S:thunderbird-debugsource-0:140.9.0-1.el8_6.aarch64
AppStream-8.6.0.Z.E4S:thunderbird-debugsource-0:140.9.0-1.el8_6.ppc64le
AppStream-8.6.0.Z.E4S:thunderbird-debugsource-0:140.9.0-1.el8_6.s390x
AppStream-8.6.0.Z.E4S:thunderbird-debugsource-0:140.9.0-1.el8_6.x86_64
AppStream-8.6.0.Z.TUS:thunderbird-0:140.9.0-1.el8_6.src
AppStream-8.6.0.Z.TUS:thunderbird-0:140.9.0-1.el8_6.x86_64
AppStream-8.6.0.Z.TUS:thunderbird-debuginfo-0:140.9.0-1.el8_6.x86_64
AppStream-8.6.0.Z.TUS:thunderbird-debugsource-0:140.9.0-1.el8_6.x86_64
Threats
Impact
Moderate
A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: Incorrect boundary conditions in the Audio/Video component
6.5 (Medium)
Vendor Fix
For details on how to apply this update, which includes the changes described in this advisory, refer to:
https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2026:8289
Product status
Fixed
AppStream-8.6.0.Z.AUS:thunderbird-0:140.9.0-1.el8_6.src
AppStream-8.6.0.Z.AUS:thunderbird-0:140.9.0-1.el8_6.x86_64
AppStream-8.6.0.Z.AUS:thunderbird-debuginfo-0:140.9.0-1.el8_6.x86_64
AppStream-8.6.0.Z.AUS:thunderbird-debugsource-0:140.9.0-1.el8_6.x86_64
AppStream-8.6.0.Z.E4S:thunderbird-0:140.9.0-1.el8_6.aarch64
AppStream-8.6.0.Z.E4S:thunderbird-0:140.9.0-1.el8_6.ppc64le
AppStream-8.6.0.Z.E4S:thunderbird-0:140.9.0-1.el8_6.s390x
AppStream-8.6.0.Z.E4S:thunderbird-0:140.9.0-1.el8_6.src
AppStream-8.6.0.Z.E4S:thunderbird-0:140.9.0-1.el8_6.x86_64
AppStream-8.6.0.Z.E4S:thunderbird-debuginfo-0:140.9.0-1.el8_6.aarch64
AppStream-8.6.0.Z.E4S:thunderbird-debuginfo-0:140.9.0-1.el8_6.ppc64le
AppStream-8.6.0.Z.E4S:thunderbird-debuginfo-0:140.9.0-1.el8_6.s390x
AppStream-8.6.0.Z.E4S:thunderbird-debuginfo-0:140.9.0-1.el8_6.x86_64
AppStream-8.6.0.Z.E4S:thunderbird-debugsource-0:140.9.0-1.el8_6.aarch64
AppStream-8.6.0.Z.E4S:thunderbird-debugsource-0:140.9.0-1.el8_6.ppc64le
AppStream-8.6.0.Z.E4S:thunderbird-debugsource-0:140.9.0-1.el8_6.s390x
AppStream-8.6.0.Z.E4S:thunderbird-debugsource-0:140.9.0-1.el8_6.x86_64
AppStream-8.6.0.Z.TUS:thunderbird-0:140.9.0-1.el8_6.src
AppStream-8.6.0.Z.TUS:thunderbird-0:140.9.0-1.el8_6.x86_64
AppStream-8.6.0.Z.TUS:thunderbird-debuginfo-0:140.9.0-1.el8_6.x86_64
AppStream-8.6.0.Z.TUS:thunderbird-debugsource-0:140.9.0-1.el8_6.x86_64
Threats
Impact
Moderate
A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: Uninitialized memory in the Graphics: Canvas2D component
6.5 (Medium)
Vendor Fix
For details on how to apply this update, which includes the changes described in this advisory, refer to:
https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2026:8289
Product status
Fixed
AppStream-8.6.0.Z.AUS:thunderbird-0:140.9.0-1.el8_6.src
AppStream-8.6.0.Z.AUS:thunderbird-0:140.9.0-1.el8_6.x86_64
AppStream-8.6.0.Z.AUS:thunderbird-debuginfo-0:140.9.0-1.el8_6.x86_64
AppStream-8.6.0.Z.AUS:thunderbird-debugsource-0:140.9.0-1.el8_6.x86_64
AppStream-8.6.0.Z.E4S:thunderbird-0:140.9.0-1.el8_6.aarch64
AppStream-8.6.0.Z.E4S:thunderbird-0:140.9.0-1.el8_6.ppc64le
AppStream-8.6.0.Z.E4S:thunderbird-0:140.9.0-1.el8_6.s390x
AppStream-8.6.0.Z.E4S:thunderbird-0:140.9.0-1.el8_6.src
AppStream-8.6.0.Z.E4S:thunderbird-0:140.9.0-1.el8_6.x86_64
AppStream-8.6.0.Z.E4S:thunderbird-debuginfo-0:140.9.0-1.el8_6.aarch64
AppStream-8.6.0.Z.E4S:thunderbird-debuginfo-0:140.9.0-1.el8_6.ppc64le
AppStream-8.6.0.Z.E4S:thunderbird-debuginfo-0:140.9.0-1.el8_6.s390x
AppStream-8.6.0.Z.E4S:thunderbird-debuginfo-0:140.9.0-1.el8_6.x86_64
AppStream-8.6.0.Z.E4S:thunderbird-debugsource-0:140.9.0-1.el8_6.aarch64
AppStream-8.6.0.Z.E4S:thunderbird-debugsource-0:140.9.0-1.el8_6.ppc64le
AppStream-8.6.0.Z.E4S:thunderbird-debugsource-0:140.9.0-1.el8_6.s390x
AppStream-8.6.0.Z.E4S:thunderbird-debugsource-0:140.9.0-1.el8_6.x86_64
AppStream-8.6.0.Z.TUS:thunderbird-0:140.9.0-1.el8_6.src
AppStream-8.6.0.Z.TUS:thunderbird-0:140.9.0-1.el8_6.x86_64
AppStream-8.6.0.Z.TUS:thunderbird-debuginfo-0:140.9.0-1.el8_6.x86_64
AppStream-8.6.0.Z.TUS:thunderbird-debugsource-0:140.9.0-1.el8_6.x86_64
Threats
Impact
Moderate
A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: Incorrect boundary conditions, uninitialized memory in the JavaScript Engine component
6.1 (Medium)
Vendor Fix
For details on how to apply this update, which includes the changes described in this advisory, refer to:
https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2026:8289
Product status
Fixed
AppStream-8.6.0.Z.AUS:thunderbird-0:140.9.0-1.el8_6.src
AppStream-8.6.0.Z.AUS:thunderbird-0:140.9.0-1.el8_6.x86_64
AppStream-8.6.0.Z.AUS:thunderbird-debuginfo-0:140.9.0-1.el8_6.x86_64
AppStream-8.6.0.Z.AUS:thunderbird-debugsource-0:140.9.0-1.el8_6.x86_64
AppStream-8.6.0.Z.E4S:thunderbird-0:140.9.0-1.el8_6.aarch64
AppStream-8.6.0.Z.E4S:thunderbird-0:140.9.0-1.el8_6.ppc64le
AppStream-8.6.0.Z.E4S:thunderbird-0:140.9.0-1.el8_6.s390x
AppStream-8.6.0.Z.E4S:thunderbird-0:140.9.0-1.el8_6.src
AppStream-8.6.0.Z.E4S:thunderbird-0:140.9.0-1.el8_6.x86_64
AppStream-8.6.0.Z.E4S:thunderbird-debuginfo-0:140.9.0-1.el8_6.aarch64
AppStream-8.6.0.Z.E4S:thunderbird-debuginfo-0:140.9.0-1.el8_6.ppc64le
AppStream-8.6.0.Z.E4S:thunderbird-debuginfo-0:140.9.0-1.el8_6.s390x
AppStream-8.6.0.Z.E4S:thunderbird-debuginfo-0:140.9.0-1.el8_6.x86_64
AppStream-8.6.0.Z.E4S:thunderbird-debugsource-0:140.9.0-1.el8_6.aarch64
AppStream-8.6.0.Z.E4S:thunderbird-debugsource-0:140.9.0-1.el8_6.ppc64le
AppStream-8.6.0.Z.E4S:thunderbird-debugsource-0:140.9.0-1.el8_6.s390x
AppStream-8.6.0.Z.E4S:thunderbird-debugsource-0:140.9.0-1.el8_6.x86_64
AppStream-8.6.0.Z.TUS:thunderbird-0:140.9.0-1.el8_6.src
AppStream-8.6.0.Z.TUS:thunderbird-0:140.9.0-1.el8_6.x86_64
AppStream-8.6.0.Z.TUS:thunderbird-debuginfo-0:140.9.0-1.el8_6.x86_64
AppStream-8.6.0.Z.TUS:thunderbird-debugsource-0:140.9.0-1.el8_6.x86_64
Threats
Impact
Moderate
A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: Privilege escalation in the Netmonitor component
6.1 (Medium)
Vendor Fix
For details on how to apply this update, which includes the changes described in this advisory, refer to:
https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2026:8289
Product status
Fixed
AppStream-8.6.0.Z.AUS:thunderbird-0:140.9.0-1.el8_6.src
AppStream-8.6.0.Z.AUS:thunderbird-0:140.9.0-1.el8_6.x86_64
AppStream-8.6.0.Z.AUS:thunderbird-debuginfo-0:140.9.0-1.el8_6.x86_64
AppStream-8.6.0.Z.AUS:thunderbird-debugsource-0:140.9.0-1.el8_6.x86_64
AppStream-8.6.0.Z.E4S:thunderbird-0:140.9.0-1.el8_6.aarch64
AppStream-8.6.0.Z.E4S:thunderbird-0:140.9.0-1.el8_6.ppc64le
AppStream-8.6.0.Z.E4S:thunderbird-0:140.9.0-1.el8_6.s390x
AppStream-8.6.0.Z.E4S:thunderbird-0:140.9.0-1.el8_6.src
AppStream-8.6.0.Z.E4S:thunderbird-0:140.9.0-1.el8_6.x86_64
AppStream-8.6.0.Z.E4S:thunderbird-debuginfo-0:140.9.0-1.el8_6.aarch64
AppStream-8.6.0.Z.E4S:thunderbird-debuginfo-0:140.9.0-1.el8_6.ppc64le
AppStream-8.6.0.Z.E4S:thunderbird-debuginfo-0:140.9.0-1.el8_6.s390x
AppStream-8.6.0.Z.E4S:thunderbird-debuginfo-0:140.9.0-1.el8_6.x86_64
AppStream-8.6.0.Z.E4S:thunderbird-debugsource-0:140.9.0-1.el8_6.aarch64
AppStream-8.6.0.Z.E4S:thunderbird-debugsource-0:140.9.0-1.el8_6.ppc64le
AppStream-8.6.0.Z.E4S:thunderbird-debugsource-0:140.9.0-1.el8_6.s390x
AppStream-8.6.0.Z.E4S:thunderbird-debugsource-0:140.9.0-1.el8_6.x86_64
AppStream-8.6.0.Z.TUS:thunderbird-0:140.9.0-1.el8_6.src
AppStream-8.6.0.Z.TUS:thunderbird-0:140.9.0-1.el8_6.x86_64
AppStream-8.6.0.Z.TUS:thunderbird-debuginfo-0:140.9.0-1.el8_6.x86_64
AppStream-8.6.0.Z.TUS:thunderbird-debugsource-0:140.9.0-1.el8_6.x86_64
Threats
Impact
Moderate
A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: Undefined behavior in the WebRTC: Signaling component
CWE-475 - Undefined Behavior for Input to API
Vendor Fix
For details on how to apply this update, which includes the changes described in this advisory, refer to:
https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2026:8289
Product status
Fixed
AppStream-8.6.0.Z.AUS:thunderbird-0:140.9.0-1.el8_6.src
AppStream-8.6.0.Z.AUS:thunderbird-0:140.9.0-1.el8_6.x86_64
AppStream-8.6.0.Z.AUS:thunderbird-debuginfo-0:140.9.0-1.el8_6.x86_64
AppStream-8.6.0.Z.AUS:thunderbird-debugsource-0:140.9.0-1.el8_6.x86_64
AppStream-8.6.0.Z.E4S:thunderbird-0:140.9.0-1.el8_6.aarch64
AppStream-8.6.0.Z.E4S:thunderbird-0:140.9.0-1.el8_6.ppc64le
AppStream-8.6.0.Z.E4S:thunderbird-0:140.9.0-1.el8_6.s390x
AppStream-8.6.0.Z.E4S:thunderbird-0:140.9.0-1.el8_6.src
AppStream-8.6.0.Z.E4S:thunderbird-0:140.9.0-1.el8_6.x86_64
AppStream-8.6.0.Z.E4S:thunderbird-debuginfo-0:140.9.0-1.el8_6.aarch64
AppStream-8.6.0.Z.E4S:thunderbird-debuginfo-0:140.9.0-1.el8_6.ppc64le
AppStream-8.6.0.Z.E4S:thunderbird-debuginfo-0:140.9.0-1.el8_6.s390x
AppStream-8.6.0.Z.E4S:thunderbird-debuginfo-0:140.9.0-1.el8_6.x86_64
AppStream-8.6.0.Z.E4S:thunderbird-debugsource-0:140.9.0-1.el8_6.aarch64
AppStream-8.6.0.Z.E4S:thunderbird-debugsource-0:140.9.0-1.el8_6.ppc64le
AppStream-8.6.0.Z.E4S:thunderbird-debugsource-0:140.9.0-1.el8_6.s390x
AppStream-8.6.0.Z.E4S:thunderbird-debugsource-0:140.9.0-1.el8_6.x86_64
AppStream-8.6.0.Z.TUS:thunderbird-0:140.9.0-1.el8_6.src
AppStream-8.6.0.Z.TUS:thunderbird-0:140.9.0-1.el8_6.x86_64
AppStream-8.6.0.Z.TUS:thunderbird-debuginfo-0:140.9.0-1.el8_6.x86_64
AppStream-8.6.0.Z.TUS:thunderbird-debugsource-0:140.9.0-1.el8_6.x86_64
Threats
Impact
Low
A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: Incorrect boundary conditions in the Graphics: Text component
CWE-805 - Buffer Access with Incorrect Length Value
Vendor Fix
For details on how to apply this update, which includes the changes described in this advisory, refer to:
https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2026:8289
Product status
Fixed
AppStream-8.6.0.Z.AUS:thunderbird-0:140.9.0-1.el8_6.src
AppStream-8.6.0.Z.AUS:thunderbird-0:140.9.0-1.el8_6.x86_64
AppStream-8.6.0.Z.AUS:thunderbird-debuginfo-0:140.9.0-1.el8_6.x86_64
AppStream-8.6.0.Z.AUS:thunderbird-debugsource-0:140.9.0-1.el8_6.x86_64
AppStream-8.6.0.Z.E4S:thunderbird-0:140.9.0-1.el8_6.aarch64
AppStream-8.6.0.Z.E4S:thunderbird-0:140.9.0-1.el8_6.ppc64le
AppStream-8.6.0.Z.E4S:thunderbird-0:140.9.0-1.el8_6.s390x
AppStream-8.6.0.Z.E4S:thunderbird-0:140.9.0-1.el8_6.src
AppStream-8.6.0.Z.E4S:thunderbird-0:140.9.0-1.el8_6.x86_64
AppStream-8.6.0.Z.E4S:thunderbird-debuginfo-0:140.9.0-1.el8_6.aarch64
AppStream-8.6.0.Z.E4S:thunderbird-debuginfo-0:140.9.0-1.el8_6.ppc64le
AppStream-8.6.0.Z.E4S:thunderbird-debuginfo-0:140.9.0-1.el8_6.s390x
AppStream-8.6.0.Z.E4S:thunderbird-debuginfo-0:140.9.0-1.el8_6.x86_64
AppStream-8.6.0.Z.E4S:thunderbird-debugsource-0:140.9.0-1.el8_6.aarch64
AppStream-8.6.0.Z.E4S:thunderbird-debugsource-0:140.9.0-1.el8_6.ppc64le
AppStream-8.6.0.Z.E4S:thunderbird-debugsource-0:140.9.0-1.el8_6.s390x
AppStream-8.6.0.Z.E4S:thunderbird-debugsource-0:140.9.0-1.el8_6.x86_64
AppStream-8.6.0.Z.TUS:thunderbird-0:140.9.0-1.el8_6.src
AppStream-8.6.0.Z.TUS:thunderbird-0:140.9.0-1.el8_6.x86_64
AppStream-8.6.0.Z.TUS:thunderbird-debuginfo-0:140.9.0-1.el8_6.x86_64
AppStream-8.6.0.Z.TUS:thunderbird-debugsource-0:140.9.0-1.el8_6.x86_64
Threats
Impact
Low
A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: Memory safety bugs present in Firefox ESR 140.8, Thunderbird ESR 140.8, Firefox 148 and Thunderbird 148. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code.
7.5 (High)
Vendor Fix
For details on how to apply this update, which includes the changes described in this advisory, refer to:
https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2026:8289
Product status
Fixed
AppStream-8.6.0.Z.AUS:thunderbird-0:140.9.0-1.el8_6.src
AppStream-8.6.0.Z.AUS:thunderbird-0:140.9.0-1.el8_6.x86_64
AppStream-8.6.0.Z.AUS:thunderbird-debuginfo-0:140.9.0-1.el8_6.x86_64
AppStream-8.6.0.Z.AUS:thunderbird-debugsource-0:140.9.0-1.el8_6.x86_64
AppStream-8.6.0.Z.E4S:thunderbird-0:140.9.0-1.el8_6.aarch64
AppStream-8.6.0.Z.E4S:thunderbird-0:140.9.0-1.el8_6.ppc64le
AppStream-8.6.0.Z.E4S:thunderbird-0:140.9.0-1.el8_6.s390x
AppStream-8.6.0.Z.E4S:thunderbird-0:140.9.0-1.el8_6.src
AppStream-8.6.0.Z.E4S:thunderbird-0:140.9.0-1.el8_6.x86_64
AppStream-8.6.0.Z.E4S:thunderbird-debuginfo-0:140.9.0-1.el8_6.aarch64
AppStream-8.6.0.Z.E4S:thunderbird-debuginfo-0:140.9.0-1.el8_6.ppc64le
AppStream-8.6.0.Z.E4S:thunderbird-debuginfo-0:140.9.0-1.el8_6.s390x
AppStream-8.6.0.Z.E4S:thunderbird-debuginfo-0:140.9.0-1.el8_6.x86_64
AppStream-8.6.0.Z.E4S:thunderbird-debugsource-0:140.9.0-1.el8_6.aarch64
AppStream-8.6.0.Z.E4S:thunderbird-debugsource-0:140.9.0-1.el8_6.ppc64le
AppStream-8.6.0.Z.E4S:thunderbird-debugsource-0:140.9.0-1.el8_6.s390x
AppStream-8.6.0.Z.E4S:thunderbird-debugsource-0:140.9.0-1.el8_6.x86_64
AppStream-8.6.0.Z.TUS:thunderbird-0:140.9.0-1.el8_6.src
AppStream-8.6.0.Z.TUS:thunderbird-0:140.9.0-1.el8_6.x86_64
AppStream-8.6.0.Z.TUS:thunderbird-debuginfo-0:140.9.0-1.el8_6.x86_64
AppStream-8.6.0.Z.TUS:thunderbird-debugsource-0:140.9.0-1.el8_6.x86_64
Threats
Impact
Important
A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: Memory safety bugs present in Firefox ESR 115.33, Firefox ESR 140.8, Thunderbird ESR 140.8, Firefox 148 and Thunderbird 148. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code.
7.5 (High)
Vendor Fix
For details on how to apply this update, which includes the changes described in this advisory, refer to:
https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2026:8289
Product status
Fixed
AppStream-8.6.0.Z.AUS:thunderbird-0:140.9.0-1.el8_6.src
AppStream-8.6.0.Z.AUS:thunderbird-0:140.9.0-1.el8_6.x86_64
AppStream-8.6.0.Z.AUS:thunderbird-debuginfo-0:140.9.0-1.el8_6.x86_64
AppStream-8.6.0.Z.AUS:thunderbird-debugsource-0:140.9.0-1.el8_6.x86_64
AppStream-8.6.0.Z.E4S:thunderbird-0:140.9.0-1.el8_6.aarch64
AppStream-8.6.0.Z.E4S:thunderbird-0:140.9.0-1.el8_6.ppc64le
AppStream-8.6.0.Z.E4S:thunderbird-0:140.9.0-1.el8_6.s390x
AppStream-8.6.0.Z.E4S:thunderbird-0:140.9.0-1.el8_6.src
AppStream-8.6.0.Z.E4S:thunderbird-0:140.9.0-1.el8_6.x86_64
AppStream-8.6.0.Z.E4S:thunderbird-debuginfo-0:140.9.0-1.el8_6.aarch64
AppStream-8.6.0.Z.E4S:thunderbird-debuginfo-0:140.9.0-1.el8_6.ppc64le
AppStream-8.6.0.Z.E4S:thunderbird-debuginfo-0:140.9.0-1.el8_6.s390x
AppStream-8.6.0.Z.E4S:thunderbird-debuginfo-0:140.9.0-1.el8_6.x86_64
AppStream-8.6.0.Z.E4S:thunderbird-debugsource-0:140.9.0-1.el8_6.aarch64
AppStream-8.6.0.Z.E4S:thunderbird-debugsource-0:140.9.0-1.el8_6.ppc64le
AppStream-8.6.0.Z.E4S:thunderbird-debugsource-0:140.9.0-1.el8_6.s390x
AppStream-8.6.0.Z.E4S:thunderbird-debugsource-0:140.9.0-1.el8_6.x86_64
AppStream-8.6.0.Z.TUS:thunderbird-0:140.9.0-1.el8_6.src
AppStream-8.6.0.Z.TUS:thunderbird-0:140.9.0-1.el8_6.x86_64
AppStream-8.6.0.Z.TUS:thunderbird-debuginfo-0:140.9.0-1.el8_6.x86_64
AppStream-8.6.0.Z.TUS:thunderbird-debugsource-0:140.9.0-1.el8_6.x86_64
Threats
Impact
Important
References
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"text": "An update for thunderbird is now available for Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support, Red Hat Enterprise Linux 8.6 Update Services for SAP Solutions, and Red Hat Enterprise Linux 8.6 Telecommunications Update Service.\n\nRed Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.",
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"text": "Mozilla Thunderbird is a standalone mail and newsgroup client.\n\nSecurity Fix(es):\n\n* firefox: thunderbird: Use-after-free in the JavaScript Engine component (CVE-2026-4701)\n\n* firefox: thunderbird: Memory safety bugs fixed in Firefox ESR 115.34, Firefox ESR 140.9, Thunderbird ESR 140.9, Firefox 149 and Thunderbird 149 (CVE-2026-4721)\n\n* firefox: thunderbird: Privilege escalation in the Netmonitor component (CVE-2026-4717)\n\n* firefox: thunderbird: Sandbox escape due to use-after-free in the Disability Access APIs component (CVE-2026-4688)\n\n* firefox: thunderbird: Incorrect boundary conditions in the Graphics: Canvas2D component (CVE-2026-4706)\n\n* firefox: thunderbird: Incorrect boundary conditions in the Audio/Video: Web Codecs component (CVE-2026-4695)\n\n* firefox: thunderbird: Sandbox escape due to incorrect boundary conditions, integer overflow in the XPCOM component (CVE-2026-4689)\n\n* firefox: thunderbird: JIT miscompilation in the JavaScript Engine: JIT component (CVE-2026-4698)\n\n* firefox: thunderbird: Incorrect boundary conditions, uninitialized memory in the JavaScript Engine component (CVE-2026-4716)\n\n* firefox: thunderbird: Race condition, use-after-free in the Graphics: WebRender component (CVE-2026-4684)\n\n* firefox: thunderbird: Undefined behavior in the WebRTC: Signaling component (CVE-2026-4705)\n\n* firefox: thunderbird: Uninitialized memory in the Graphics: Canvas2D component (CVE-2026-4715)\n\n* firefox: thunderbird: Incorrect boundary conditions in the Graphics: Canvas2D component (CVE-2026-4685)\n\n* firefox: thunderbird: Incorrect boundary conditions in the Audio/Video component (CVE-2026-4714)\n\n* firefox: thunderbird: Incorrect boundary conditions in the Audio/Video: GMP component (CVE-2026-4709)\n\n* firefox: thunderbird: Incorrect boundary conditions in the Audio/Video component (CVE-2026-4710)\n\n* firefox: thunderbird: Information disclosure in the Widget: Cocoa component (CVE-2026-4712)\n\n* firefox: thunderbird: Incorrect boundary conditions in the Audio/Video: Web Codecs component (CVE-2026-4697)\n\n* firefox: thunderbird: Incorrect boundary conditions in the Graphics component (CVE-2026-4713)\n\n* firefox: thunderbird: Sandbox escape due to incorrect boundary conditions, integer overflow in the XPCOM component (CVE-2026-4690)\n\n* firefox: thunderbird: Use-after-free in the Widget: Cocoa component (CVE-2026-4711)\n\n* firefox: thunderbird: Incorrect boundary conditions in the Graphics: Canvas2D component (CVE-2026-4686)\n\n* firefox: thunderbird: Incorrect boundary conditions in the Graphics component (CVE-2026-4708)\n\n* firefox: thunderbird: Use-after-free in the CSS Parsing and Computation component (CVE-2026-4691)\n\n* firefox: thunderbird: Incorrect boundary conditions in the Layout: Text and Fonts component (CVE-2026-4699)\n\n* firefox: thunderbird: Use-after-free in the Layout: Text and Fonts component (CVE-2026-4696)\n\n* firefox: thunderbird: Incorrect boundary conditions in the Audio/Video: Playback component (CVE-2026-4693)\n\n* firefox: thunderbird: Undefined behavior in the WebRTC: Signaling component (CVE-2026-4718)\n\n* firefox: thunderbird: JIT miscompilation in the JavaScript Engine component (CVE-2026-4702)\n\n* firefox: thunderbird: Incorrect boundary conditions in the Graphics: Text component (CVE-2026-4719)\n\n* firefox: thunderbird: Incorrect boundary conditions, integer overflow in the Graphics component (CVE-2026-4694)\n\n* firefox: thunderbird: Sandbox escape in the Responsive Design Mode component (CVE-2026-4692)\n\n* firefox: thunderbird: Memory safety bugs fixed in Firefox ESR 140.9, Thunderbird ESR 140.9, Firefox 149 and Thunderbird 149 (CVE-2026-4720)\n\n* firefox: thunderbird: Mitigation bypass in the Networking: HTTP component (CVE-2026-4700)\n\n* firefox: thunderbird: Incorrect boundary conditions in the Graphics: Canvas2D component (CVE-2026-4707)\n\n* firefox: thunderbird: Denial-of-service in the WebRTC: Signaling component (CVE-2026-4704)\n\n* firefox: thunderbird: Sandbox escape due to incorrect boundary conditions in the Telemetry component (CVE-2026-4687)\n\n* thunderbird: Out of bounds read in IMAP parsing (CVE-2026-4371)\n\n* thunderbird: Spoofing issue in Thunderbird (CVE-2026-3889)\n\nFor more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.",
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},
"references": [
{
"category": "self",
"summary": "Canonical URL",
"url": "https://access.redhat.com/security/cve/CVE-2026-4721"
},
{
"category": "external",
"summary": "RHBZ#2450711",
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2450711"
},
{
"category": "external",
"summary": "https://www.cve.org/CVERecord?id=CVE-2026-4721",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-4721"
},
{
"category": "external",
"summary": "https://nvd.nist.gov/vuln/detail/CVE-2026-4721",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-4721"
},
{
"category": "external",
"summary": "https://www.mozilla.org/security/advisories/mfsa2026-22/#CVE-2026-4721",
"url": "https://www.mozilla.org/security/advisories/mfsa2026-22/#CVE-2026-4721"
},
{
"category": "external",
"summary": "https://www.mozilla.org/security/advisories/mfsa2026-24/#CVE-2026-4721",
"url": "https://www.mozilla.org/security/advisories/mfsa2026-24/#CVE-2026-4721"
}
],
"release_date": "2026-03-24T12:30:44.312000+00:00",
"remediations": [
{
"category": "vendor_fix",
"date": "2026-04-15T10:48:56+00:00",
"details": "For details on how to apply this update, which includes the changes described in this advisory, refer to:\n\nhttps://access.redhat.com/articles/11258",
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],
"restart_required": {
"category": "none"
},
"url": "https://access.redhat.com/errata/RHSA-2026:8289"
}
],
"scores": [
{
"cvss_v3": {
"attackComplexity": "HIGH",
"attackVector": "NETWORK",
"availabilityImpact": "HIGH",
"baseScore": 7.5,
"baseSeverity": "HIGH",
"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "REQUIRED",
"vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H",
"version": "3.1"
},
"products": [
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}
],
"threats": [
{
"category": "impact",
"details": "Important"
}
],
"title": "firefox: thunderbird: Memory safety bugs fixed in Firefox ESR 115.34, Firefox ESR 140.9, Thunderbird ESR 140.9, Firefox 149 and Thunderbird 149"
}
]
}
RHSA-2026:8427
Vulnerability from csaf_redhat - Published: 2026-04-16 10:20 - Updated: 2026-04-28 18:40Summary
Red Hat Security Advisory: firefox security update
Severity
Important
Notes
Topic: An update for firefox is now available for Red Hat Enterprise Linux 7 Extended Lifecycle Support.
Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.
Details: Mozilla Firefox is an open-source web browser, designed for standards compliance, performance, and portability.
Security Fix(es):
* firefox: thunderbird: Use-after-free in the JavaScript Engine component (CVE-2026-4701)
* firefox: thunderbird: Memory safety bugs fixed in Firefox ESR 115.34, Firefox ESR 140.9, Thunderbird ESR 140.9, Firefox 149 and Thunderbird 149 (CVE-2026-4721)
* firefox: thunderbird: Privilege escalation in the Netmonitor component (CVE-2026-4717)
* firefox: thunderbird: Sandbox escape due to use-after-free in the Disability Access APIs component (CVE-2026-4688)
* firefox: thunderbird: Incorrect boundary conditions in the Graphics: Canvas2D component (CVE-2026-4706)
* firefox: thunderbird: Incorrect boundary conditions in the Audio/Video: Web Codecs component (CVE-2026-4695)
* firefox: thunderbird: Sandbox escape due to incorrect boundary conditions, integer overflow in the XPCOM component (CVE-2026-4689)
* firefox: thunderbird: JIT miscompilation in the JavaScript Engine: JIT component (CVE-2026-4698)
* firefox: thunderbird: Incorrect boundary conditions, uninitialized memory in the JavaScript Engine component (CVE-2026-4716)
* firefox: thunderbird: Race condition, use-after-free in the Graphics: WebRender component (CVE-2026-4684)
* firefox: thunderbird: Undefined behavior in the WebRTC: Signaling component (CVE-2026-4705)
* firefox: thunderbird: Uninitialized memory in the Graphics: Canvas2D component (CVE-2026-4715)
* firefox: thunderbird: Incorrect boundary conditions in the Graphics: Canvas2D component (CVE-2026-4685)
* firefox: thunderbird: Incorrect boundary conditions in the Audio/Video component (CVE-2026-4714)
* firefox: thunderbird: Incorrect boundary conditions in the Audio/Video: GMP component (CVE-2026-4709)
* firefox: thunderbird: Incorrect boundary conditions in the Audio/Video component (CVE-2026-4710)
* firefox: thunderbird: Information disclosure in the Widget: Cocoa component (CVE-2026-4712)
* firefox: thunderbird: Incorrect boundary conditions in the Audio/Video: Web Codecs component (CVE-2026-4697)
* firefox: thunderbird: Incorrect boundary conditions in the Graphics component (CVE-2026-4713)
* firefox: thunderbird: Sandbox escape due to incorrect boundary conditions, integer overflow in the XPCOM component (CVE-2026-4690)
* firefox: thunderbird: Use-after-free in the Widget: Cocoa component (CVE-2026-4711)
* firefox: thunderbird: Incorrect boundary conditions in the Graphics: Canvas2D component (CVE-2026-4686)
* firefox: thunderbird: Incorrect boundary conditions in the Graphics component (CVE-2026-4708)
* firefox: thunderbird: Use-after-free in the CSS Parsing and Computation component (CVE-2026-4691)
* firefox: thunderbird: Incorrect boundary conditions in the Layout: Text and Fonts component (CVE-2026-4699)
* firefox: thunderbird: Use-after-free in the Layout: Text and Fonts component (CVE-2026-4696)
* firefox: thunderbird: Incorrect boundary conditions in the Audio/Video: Playback component (CVE-2026-4693)
* firefox: thunderbird: Undefined behavior in the WebRTC: Signaling component (CVE-2026-4718)
* firefox: thunderbird: JIT miscompilation in the JavaScript Engine component (CVE-2026-4702)
* firefox: thunderbird: Incorrect boundary conditions in the Graphics: Text component (CVE-2026-4719)
* firefox: thunderbird: Incorrect boundary conditions, integer overflow in the Graphics component (CVE-2026-4694)
* firefox: thunderbird: Sandbox escape in the Responsive Design Mode component (CVE-2026-4692)
* firefox: thunderbird: Memory safety bugs fixed in Firefox ESR 140.9, Thunderbird ESR 140.9, Firefox 149 and Thunderbird 149 (CVE-2026-4720)
* firefox: thunderbird: Mitigation bypass in the Networking: HTTP component (CVE-2026-4700)
* firefox: thunderbird: Incorrect boundary conditions in the Graphics: Canvas2D component (CVE-2026-4707)
* firefox: thunderbird: Denial-of-service in the WebRTC: Signaling component (CVE-2026-4704)
* firefox: thunderbird: Sandbox escape due to incorrect boundary conditions in the Telemetry component (CVE-2026-4687)
For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.
Terms of Use: This content is licensed under the Creative Commons Attribution 4.0 International License (https://creativecommons.org/licenses/by/4.0/). If you distribute this content, or a modified version of it, you must provide attribution to Red Hat Inc. and provide a link to the original.
A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: Race condition, use-after-free in the Graphics: WebRender component
7.5 (High)
Vendor Fix
For details on how to apply this update, which includes the changes described in this advisory, refer to:
https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2026:8427
Product status
Fixed
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Threats
Impact
Important
A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: Incorrect boundary conditions in the Graphics: Canvas2D component
7.5 (High)
Vendor Fix
For details on how to apply this update, which includes the changes described in this advisory, refer to:
https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2026:8427
Product status
Fixed
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Threats
Impact
Important
A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: Incorrect boundary conditions in the Graphics: Canvas2D component
7.5 (High)
Vendor Fix
For details on how to apply this update, which includes the changes described in this advisory, refer to:
https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2026:8427
Product status
Fixed
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Threats
Impact
Important
A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: Sandbox escape due to incorrect boundary conditions in the Telemetry component
7.5 (High)
Vendor Fix
For details on how to apply this update, which includes the changes described in this advisory, refer to:
https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2026:8427
Product status
Fixed
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7Server-ELS:firefox-debuginfo-0:140.9.0-1.el7_9.s390x
Threats
Impact
Important
A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: Sandbox escape due to use-after-free in the Disability Access APIs component
7.5 (High)
Vendor Fix
For details on how to apply this update, which includes the changes described in this advisory, refer to:
https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2026:8427
Product status
Fixed
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7Server-ELS:firefox-debuginfo-0:140.9.0-1.el7_9.s390x
Threats
Impact
Important
A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: Sandbox escape due to incorrect boundary conditions, integer overflow in the XPCOM component
7.5 (High)
Vendor Fix
For details on how to apply this update, which includes the changes described in this advisory, refer to:
https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2026:8427
Product status
Fixed
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7Server-ELS:firefox-0:140.9.0-1.el7_9.ppc64le
7Server-ELS:firefox-0:140.9.0-1.el7_9.s390x
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7Server-ELS:firefox-debuginfo-0:140.9.0-1.el7_9.s390x
Threats
Impact
Important
A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: Sandbox escape due to incorrect boundary conditions, integer overflow in the XPCOM component
7.5 (High)
Vendor Fix
For details on how to apply this update, which includes the changes described in this advisory, refer to:
https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2026:8427
Product status
Fixed
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Threats
Impact
Important
A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: Use-after-free in the CSS Parsing and Computation component
7.5 (High)
Vendor Fix
For details on how to apply this update, which includes the changes described in this advisory, refer to:
https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2026:8427
Product status
Fixed
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7Server-ELS:firefox-0:140.9.0-1.el7_9.ppc64le
7Server-ELS:firefox-0:140.9.0-1.el7_9.s390x
7Server-ELS:firefox-0:140.9.0-1.el7_9.src
7Server-ELS:firefox-0:140.9.0-1.el7_9.x86_64
7Server-ELS:firefox-debuginfo-0:140.9.0-1.el7_9.ppc64
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7Server-ELS:firefox-debuginfo-0:140.9.0-1.el7_9.s390x
Threats
Impact
Important
A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: Sandbox escape in the Responsive Design Mode component
7.5 (High)
Vendor Fix
For details on how to apply this update, which includes the changes described in this advisory, refer to:
https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2026:8427
Product status
Fixed
7Server-ELS:firefox-0:140.9.0-1.el7_9.ppc64
7Server-ELS:firefox-0:140.9.0-1.el7_9.ppc64le
7Server-ELS:firefox-0:140.9.0-1.el7_9.s390x
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Threats
Impact
Important
A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: Incorrect boundary conditions in the Audio/Video: Playback component
7.5 (High)
Vendor Fix
For details on how to apply this update, which includes the changes described in this advisory, refer to:
https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2026:8427
Product status
Fixed
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7Server-ELS:firefox-0:140.9.0-1.el7_9.x86_64
7Server-ELS:firefox-debuginfo-0:140.9.0-1.el7_9.ppc64
7Server-ELS:firefox-debuginfo-0:140.9.0-1.el7_9.ppc64le
7Server-ELS:firefox-debuginfo-0:140.9.0-1.el7_9.s390x
Threats
Impact
Important
A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: Incorrect boundary conditions, integer overflow in the Graphics component
7.5 (High)
Vendor Fix
For details on how to apply this update, which includes the changes described in this advisory, refer to:
https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2026:8427
Product status
Fixed
7Server-ELS:firefox-0:140.9.0-1.el7_9.ppc64
7Server-ELS:firefox-0:140.9.0-1.el7_9.ppc64le
7Server-ELS:firefox-0:140.9.0-1.el7_9.s390x
7Server-ELS:firefox-0:140.9.0-1.el7_9.src
7Server-ELS:firefox-0:140.9.0-1.el7_9.x86_64
7Server-ELS:firefox-debuginfo-0:140.9.0-1.el7_9.ppc64
7Server-ELS:firefox-debuginfo-0:140.9.0-1.el7_9.ppc64le
7Server-ELS:firefox-debuginfo-0:140.9.0-1.el7_9.s390x
Threats
Impact
Important
A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: Incorrect boundary conditions in the Audio/Video: Web Codecs component
7.5 (High)
Vendor Fix
For details on how to apply this update, which includes the changes described in this advisory, refer to:
https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2026:8427
Product status
Fixed
7Server-ELS:firefox-0:140.9.0-1.el7_9.ppc64
7Server-ELS:firefox-0:140.9.0-1.el7_9.ppc64le
7Server-ELS:firefox-0:140.9.0-1.el7_9.s390x
7Server-ELS:firefox-0:140.9.0-1.el7_9.src
7Server-ELS:firefox-0:140.9.0-1.el7_9.x86_64
7Server-ELS:firefox-debuginfo-0:140.9.0-1.el7_9.ppc64
7Server-ELS:firefox-debuginfo-0:140.9.0-1.el7_9.ppc64le
7Server-ELS:firefox-debuginfo-0:140.9.0-1.el7_9.s390x
Threats
Impact
Important
A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: Use-after-free in the Layout: Text and Fonts component
7.5 (High)
Vendor Fix
For details on how to apply this update, which includes the changes described in this advisory, refer to:
https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2026:8427
Product status
Fixed
7Server-ELS:firefox-0:140.9.0-1.el7_9.ppc64
7Server-ELS:firefox-0:140.9.0-1.el7_9.ppc64le
7Server-ELS:firefox-0:140.9.0-1.el7_9.s390x
7Server-ELS:firefox-0:140.9.0-1.el7_9.src
7Server-ELS:firefox-0:140.9.0-1.el7_9.x86_64
7Server-ELS:firefox-debuginfo-0:140.9.0-1.el7_9.ppc64
7Server-ELS:firefox-debuginfo-0:140.9.0-1.el7_9.ppc64le
7Server-ELS:firefox-debuginfo-0:140.9.0-1.el7_9.s390x
Threats
Impact
Important
A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: Incorrect boundary conditions in the Audio/Video: Web Codecs component
7.5 (High)
Vendor Fix
For details on how to apply this update, which includes the changes described in this advisory, refer to:
https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2026:8427
Product status
Fixed
7Server-ELS:firefox-0:140.9.0-1.el7_9.ppc64
7Server-ELS:firefox-0:140.9.0-1.el7_9.ppc64le
7Server-ELS:firefox-0:140.9.0-1.el7_9.s390x
7Server-ELS:firefox-0:140.9.0-1.el7_9.src
7Server-ELS:firefox-0:140.9.0-1.el7_9.x86_64
7Server-ELS:firefox-debuginfo-0:140.9.0-1.el7_9.ppc64
7Server-ELS:firefox-debuginfo-0:140.9.0-1.el7_9.ppc64le
7Server-ELS:firefox-debuginfo-0:140.9.0-1.el7_9.s390x
Threats
Impact
Important
A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: JIT miscompilation in the JavaScript Engine: JIT component
7.5 (High)
Vendor Fix
For details on how to apply this update, which includes the changes described in this advisory, refer to:
https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2026:8427
Product status
Fixed
7Server-ELS:firefox-0:140.9.0-1.el7_9.ppc64
7Server-ELS:firefox-0:140.9.0-1.el7_9.ppc64le
7Server-ELS:firefox-0:140.9.0-1.el7_9.s390x
7Server-ELS:firefox-0:140.9.0-1.el7_9.src
7Server-ELS:firefox-0:140.9.0-1.el7_9.x86_64
7Server-ELS:firefox-debuginfo-0:140.9.0-1.el7_9.ppc64
7Server-ELS:firefox-debuginfo-0:140.9.0-1.el7_9.ppc64le
7Server-ELS:firefox-debuginfo-0:140.9.0-1.el7_9.s390x
Threats
Impact
Important
A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: Incorrect boundary conditions in the Layout: Text and Fonts component
7.5 (High)
Vendor Fix
For details on how to apply this update, which includes the changes described in this advisory, refer to:
https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2026:8427
Product status
Fixed
7Server-ELS:firefox-0:140.9.0-1.el7_9.ppc64
7Server-ELS:firefox-0:140.9.0-1.el7_9.ppc64le
7Server-ELS:firefox-0:140.9.0-1.el7_9.s390x
7Server-ELS:firefox-0:140.9.0-1.el7_9.src
7Server-ELS:firefox-0:140.9.0-1.el7_9.x86_64
7Server-ELS:firefox-debuginfo-0:140.9.0-1.el7_9.ppc64
7Server-ELS:firefox-debuginfo-0:140.9.0-1.el7_9.ppc64le
7Server-ELS:firefox-debuginfo-0:140.9.0-1.el7_9.s390x
Threats
Impact
Important
A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: Mitigation bypass in the Networking: HTTP component
7.5 (High)
Vendor Fix
For details on how to apply this update, which includes the changes described in this advisory, refer to:
https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2026:8427
Product status
Fixed
7Server-ELS:firefox-0:140.9.0-1.el7_9.ppc64
7Server-ELS:firefox-0:140.9.0-1.el7_9.ppc64le
7Server-ELS:firefox-0:140.9.0-1.el7_9.s390x
7Server-ELS:firefox-0:140.9.0-1.el7_9.src
7Server-ELS:firefox-0:140.9.0-1.el7_9.x86_64
7Server-ELS:firefox-debuginfo-0:140.9.0-1.el7_9.ppc64
7Server-ELS:firefox-debuginfo-0:140.9.0-1.el7_9.ppc64le
7Server-ELS:firefox-debuginfo-0:140.9.0-1.el7_9.s390x
Threats
Impact
Important
A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: Use-after-free in the JavaScript Engine component
6.1 (Medium)
Vendor Fix
For details on how to apply this update, which includes the changes described in this advisory, refer to:
https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2026:8427
Product status
Fixed
7Server-ELS:firefox-0:140.9.0-1.el7_9.ppc64
7Server-ELS:firefox-0:140.9.0-1.el7_9.ppc64le
7Server-ELS:firefox-0:140.9.0-1.el7_9.s390x
7Server-ELS:firefox-0:140.9.0-1.el7_9.src
7Server-ELS:firefox-0:140.9.0-1.el7_9.x86_64
7Server-ELS:firefox-debuginfo-0:140.9.0-1.el7_9.ppc64
7Server-ELS:firefox-debuginfo-0:140.9.0-1.el7_9.ppc64le
7Server-ELS:firefox-debuginfo-0:140.9.0-1.el7_9.s390x
Threats
Impact
Moderate
A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: JIT miscompilation in the JavaScript Engine component
6.1 (Medium)
Vendor Fix
For details on how to apply this update, which includes the changes described in this advisory, refer to:
https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2026:8427
Product status
Fixed
7Server-ELS:firefox-0:140.9.0-1.el7_9.ppc64
7Server-ELS:firefox-0:140.9.0-1.el7_9.ppc64le
7Server-ELS:firefox-0:140.9.0-1.el7_9.s390x
7Server-ELS:firefox-0:140.9.0-1.el7_9.src
7Server-ELS:firefox-0:140.9.0-1.el7_9.x86_64
7Server-ELS:firefox-debuginfo-0:140.9.0-1.el7_9.ppc64
7Server-ELS:firefox-debuginfo-0:140.9.0-1.el7_9.ppc64le
7Server-ELS:firefox-debuginfo-0:140.9.0-1.el7_9.s390x
Threats
Impact
Moderate
A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: Denial-of-service in the WebRTC: Signaling component
7.5 (High)
Vendor Fix
For details on how to apply this update, which includes the changes described in this advisory, refer to:
https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2026:8427
Product status
Fixed
7Server-ELS:firefox-0:140.9.0-1.el7_9.ppc64
7Server-ELS:firefox-0:140.9.0-1.el7_9.ppc64le
7Server-ELS:firefox-0:140.9.0-1.el7_9.s390x
7Server-ELS:firefox-0:140.9.0-1.el7_9.src
7Server-ELS:firefox-0:140.9.0-1.el7_9.x86_64
7Server-ELS:firefox-debuginfo-0:140.9.0-1.el7_9.ppc64
7Server-ELS:firefox-debuginfo-0:140.9.0-1.el7_9.ppc64le
7Server-ELS:firefox-debuginfo-0:140.9.0-1.el7_9.s390x
Threats
Impact
Moderate
A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: Undefined behavior in the WebRTC: Signaling component
6.5 (Medium)
Vendor Fix
For details on how to apply this update, which includes the changes described in this advisory, refer to:
https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2026:8427
Product status
Fixed
7Server-ELS:firefox-0:140.9.0-1.el7_9.ppc64
7Server-ELS:firefox-0:140.9.0-1.el7_9.ppc64le
7Server-ELS:firefox-0:140.9.0-1.el7_9.s390x
7Server-ELS:firefox-0:140.9.0-1.el7_9.src
7Server-ELS:firefox-0:140.9.0-1.el7_9.x86_64
7Server-ELS:firefox-debuginfo-0:140.9.0-1.el7_9.ppc64
7Server-ELS:firefox-debuginfo-0:140.9.0-1.el7_9.ppc64le
7Server-ELS:firefox-debuginfo-0:140.9.0-1.el7_9.s390x
Threats
Impact
Moderate
A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: Incorrect boundary conditions in the Graphics: Canvas2D component
6.1 (Medium)
Vendor Fix
For details on how to apply this update, which includes the changes described in this advisory, refer to:
https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2026:8427
Product status
Fixed
7Server-ELS:firefox-0:140.9.0-1.el7_9.ppc64
7Server-ELS:firefox-0:140.9.0-1.el7_9.ppc64le
7Server-ELS:firefox-0:140.9.0-1.el7_9.s390x
7Server-ELS:firefox-0:140.9.0-1.el7_9.src
7Server-ELS:firefox-0:140.9.0-1.el7_9.x86_64
7Server-ELS:firefox-debuginfo-0:140.9.0-1.el7_9.ppc64
7Server-ELS:firefox-debuginfo-0:140.9.0-1.el7_9.ppc64le
7Server-ELS:firefox-debuginfo-0:140.9.0-1.el7_9.s390x
Threats
Impact
Moderate
A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: Incorrect boundary conditions in the Graphics: Canvas2D component
6.1 (Medium)
Vendor Fix
For details on how to apply this update, which includes the changes described in this advisory, refer to:
https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2026:8427
Product status
Fixed
7Server-ELS:firefox-0:140.9.0-1.el7_9.ppc64
7Server-ELS:firefox-0:140.9.0-1.el7_9.ppc64le
7Server-ELS:firefox-0:140.9.0-1.el7_9.s390x
7Server-ELS:firefox-0:140.9.0-1.el7_9.src
7Server-ELS:firefox-0:140.9.0-1.el7_9.x86_64
7Server-ELS:firefox-debuginfo-0:140.9.0-1.el7_9.ppc64
7Server-ELS:firefox-debuginfo-0:140.9.0-1.el7_9.ppc64le
7Server-ELS:firefox-debuginfo-0:140.9.0-1.el7_9.s390x
Threats
Impact
Moderate
A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: Incorrect boundary conditions in the Graphics component
6.1 (Medium)
Vendor Fix
For details on how to apply this update, which includes the changes described in this advisory, refer to:
https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2026:8427
Product status
Fixed
7Server-ELS:firefox-0:140.9.0-1.el7_9.ppc64
7Server-ELS:firefox-0:140.9.0-1.el7_9.ppc64le
7Server-ELS:firefox-0:140.9.0-1.el7_9.s390x
7Server-ELS:firefox-0:140.9.0-1.el7_9.src
7Server-ELS:firefox-0:140.9.0-1.el7_9.x86_64
7Server-ELS:firefox-debuginfo-0:140.9.0-1.el7_9.ppc64
7Server-ELS:firefox-debuginfo-0:140.9.0-1.el7_9.ppc64le
7Server-ELS:firefox-debuginfo-0:140.9.0-1.el7_9.s390x
Threats
Impact
Moderate
A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: Incorrect boundary conditions in the Audio/Video: GMP component
6.1 (Medium)
Vendor Fix
For details on how to apply this update, which includes the changes described in this advisory, refer to:
https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2026:8427
Product status
Fixed
7Server-ELS:firefox-0:140.9.0-1.el7_9.ppc64
7Server-ELS:firefox-0:140.9.0-1.el7_9.ppc64le
7Server-ELS:firefox-0:140.9.0-1.el7_9.s390x
7Server-ELS:firefox-0:140.9.0-1.el7_9.src
7Server-ELS:firefox-0:140.9.0-1.el7_9.x86_64
7Server-ELS:firefox-debuginfo-0:140.9.0-1.el7_9.ppc64
7Server-ELS:firefox-debuginfo-0:140.9.0-1.el7_9.ppc64le
7Server-ELS:firefox-debuginfo-0:140.9.0-1.el7_9.s390x
Threats
Impact
Moderate
A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: Incorrect boundary conditions in the Audio/Video component
6.1 (Medium)
Vendor Fix
For details on how to apply this update, which includes the changes described in this advisory, refer to:
https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2026:8427
Product status
Fixed
7Server-ELS:firefox-0:140.9.0-1.el7_9.ppc64
7Server-ELS:firefox-0:140.9.0-1.el7_9.ppc64le
7Server-ELS:firefox-0:140.9.0-1.el7_9.s390x
7Server-ELS:firefox-0:140.9.0-1.el7_9.src
7Server-ELS:firefox-0:140.9.0-1.el7_9.x86_64
7Server-ELS:firefox-debuginfo-0:140.9.0-1.el7_9.ppc64
7Server-ELS:firefox-debuginfo-0:140.9.0-1.el7_9.ppc64le
7Server-ELS:firefox-debuginfo-0:140.9.0-1.el7_9.s390x
Threats
Impact
Moderate
A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: Use-after-free in the Widget: Cocoa component
6.1 (Medium)
Vendor Fix
For details on how to apply this update, which includes the changes described in this advisory, refer to:
https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2026:8427
Product status
Fixed
7Server-ELS:firefox-0:140.9.0-1.el7_9.ppc64
7Server-ELS:firefox-0:140.9.0-1.el7_9.ppc64le
7Server-ELS:firefox-0:140.9.0-1.el7_9.s390x
7Server-ELS:firefox-0:140.9.0-1.el7_9.src
7Server-ELS:firefox-0:140.9.0-1.el7_9.x86_64
7Server-ELS:firefox-debuginfo-0:140.9.0-1.el7_9.ppc64
7Server-ELS:firefox-debuginfo-0:140.9.0-1.el7_9.ppc64le
7Server-ELS:firefox-debuginfo-0:140.9.0-1.el7_9.s390x
Threats
Impact
Moderate
A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: Information disclosure in the Widget: Cocoa component
6.5 (Medium)
Vendor Fix
For details on how to apply this update, which includes the changes described in this advisory, refer to:
https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2026:8427
Product status
Fixed
7Server-ELS:firefox-0:140.9.0-1.el7_9.ppc64
7Server-ELS:firefox-0:140.9.0-1.el7_9.ppc64le
7Server-ELS:firefox-0:140.9.0-1.el7_9.s390x
7Server-ELS:firefox-0:140.9.0-1.el7_9.src
7Server-ELS:firefox-0:140.9.0-1.el7_9.x86_64
7Server-ELS:firefox-debuginfo-0:140.9.0-1.el7_9.ppc64
7Server-ELS:firefox-debuginfo-0:140.9.0-1.el7_9.ppc64le
7Server-ELS:firefox-debuginfo-0:140.9.0-1.el7_9.s390x
Threats
Impact
Moderate
A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: Incorrect boundary conditions in the Graphics component
6.1 (Medium)
Vendor Fix
For details on how to apply this update, which includes the changes described in this advisory, refer to:
https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2026:8427
Product status
Fixed
7Server-ELS:firefox-0:140.9.0-1.el7_9.ppc64
7Server-ELS:firefox-0:140.9.0-1.el7_9.ppc64le
7Server-ELS:firefox-0:140.9.0-1.el7_9.s390x
7Server-ELS:firefox-0:140.9.0-1.el7_9.src
7Server-ELS:firefox-0:140.9.0-1.el7_9.x86_64
7Server-ELS:firefox-debuginfo-0:140.9.0-1.el7_9.ppc64
7Server-ELS:firefox-debuginfo-0:140.9.0-1.el7_9.ppc64le
7Server-ELS:firefox-debuginfo-0:140.9.0-1.el7_9.s390x
Threats
Impact
Moderate
A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: Incorrect boundary conditions in the Audio/Video component
6.5 (Medium)
Vendor Fix
For details on how to apply this update, which includes the changes described in this advisory, refer to:
https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2026:8427
Product status
Fixed
7Server-ELS:firefox-0:140.9.0-1.el7_9.ppc64
7Server-ELS:firefox-0:140.9.0-1.el7_9.ppc64le
7Server-ELS:firefox-0:140.9.0-1.el7_9.s390x
7Server-ELS:firefox-0:140.9.0-1.el7_9.src
7Server-ELS:firefox-0:140.9.0-1.el7_9.x86_64
7Server-ELS:firefox-debuginfo-0:140.9.0-1.el7_9.ppc64
7Server-ELS:firefox-debuginfo-0:140.9.0-1.el7_9.ppc64le
7Server-ELS:firefox-debuginfo-0:140.9.0-1.el7_9.s390x
Threats
Impact
Moderate
A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: Uninitialized memory in the Graphics: Canvas2D component
6.5 (Medium)
Vendor Fix
For details on how to apply this update, which includes the changes described in this advisory, refer to:
https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2026:8427
Product status
Fixed
7Server-ELS:firefox-0:140.9.0-1.el7_9.ppc64
7Server-ELS:firefox-0:140.9.0-1.el7_9.ppc64le
7Server-ELS:firefox-0:140.9.0-1.el7_9.s390x
7Server-ELS:firefox-0:140.9.0-1.el7_9.src
7Server-ELS:firefox-0:140.9.0-1.el7_9.x86_64
7Server-ELS:firefox-debuginfo-0:140.9.0-1.el7_9.ppc64
7Server-ELS:firefox-debuginfo-0:140.9.0-1.el7_9.ppc64le
7Server-ELS:firefox-debuginfo-0:140.9.0-1.el7_9.s390x
Threats
Impact
Moderate
A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: Incorrect boundary conditions, uninitialized memory in the JavaScript Engine component
6.1 (Medium)
Vendor Fix
For details on how to apply this update, which includes the changes described in this advisory, refer to:
https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2026:8427
Product status
Fixed
7Server-ELS:firefox-0:140.9.0-1.el7_9.ppc64
7Server-ELS:firefox-0:140.9.0-1.el7_9.ppc64le
7Server-ELS:firefox-0:140.9.0-1.el7_9.s390x
7Server-ELS:firefox-0:140.9.0-1.el7_9.src
7Server-ELS:firefox-0:140.9.0-1.el7_9.x86_64
7Server-ELS:firefox-debuginfo-0:140.9.0-1.el7_9.ppc64
7Server-ELS:firefox-debuginfo-0:140.9.0-1.el7_9.ppc64le
7Server-ELS:firefox-debuginfo-0:140.9.0-1.el7_9.s390x
Threats
Impact
Moderate
A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: Privilege escalation in the Netmonitor component
6.1 (Medium)
Vendor Fix
For details on how to apply this update, which includes the changes described in this advisory, refer to:
https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2026:8427
Product status
Fixed
7Server-ELS:firefox-0:140.9.0-1.el7_9.ppc64
7Server-ELS:firefox-0:140.9.0-1.el7_9.ppc64le
7Server-ELS:firefox-0:140.9.0-1.el7_9.s390x
7Server-ELS:firefox-0:140.9.0-1.el7_9.src
7Server-ELS:firefox-0:140.9.0-1.el7_9.x86_64
7Server-ELS:firefox-debuginfo-0:140.9.0-1.el7_9.ppc64
7Server-ELS:firefox-debuginfo-0:140.9.0-1.el7_9.ppc64le
7Server-ELS:firefox-debuginfo-0:140.9.0-1.el7_9.s390x
Threats
Impact
Moderate
A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: Undefined behavior in the WebRTC: Signaling component
CWE-475 - Undefined Behavior for Input to API
Vendor Fix
For details on how to apply this update, which includes the changes described in this advisory, refer to:
https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2026:8427
Product status
Fixed
7Server-ELS:firefox-0:140.9.0-1.el7_9.ppc64
7Server-ELS:firefox-0:140.9.0-1.el7_9.ppc64le
7Server-ELS:firefox-0:140.9.0-1.el7_9.s390x
7Server-ELS:firefox-0:140.9.0-1.el7_9.src
7Server-ELS:firefox-0:140.9.0-1.el7_9.x86_64
7Server-ELS:firefox-debuginfo-0:140.9.0-1.el7_9.ppc64
7Server-ELS:firefox-debuginfo-0:140.9.0-1.el7_9.ppc64le
7Server-ELS:firefox-debuginfo-0:140.9.0-1.el7_9.s390x
Threats
Impact
Low
A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: Incorrect boundary conditions in the Graphics: Text component
CWE-805 - Buffer Access with Incorrect Length Value
Vendor Fix
For details on how to apply this update, which includes the changes described in this advisory, refer to:
https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2026:8427
Product status
Fixed
7Server-ELS:firefox-0:140.9.0-1.el7_9.ppc64
7Server-ELS:firefox-0:140.9.0-1.el7_9.ppc64le
7Server-ELS:firefox-0:140.9.0-1.el7_9.s390x
7Server-ELS:firefox-0:140.9.0-1.el7_9.src
7Server-ELS:firefox-0:140.9.0-1.el7_9.x86_64
7Server-ELS:firefox-debuginfo-0:140.9.0-1.el7_9.ppc64
7Server-ELS:firefox-debuginfo-0:140.9.0-1.el7_9.ppc64le
7Server-ELS:firefox-debuginfo-0:140.9.0-1.el7_9.s390x
Threats
Impact
Low
A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: Memory safety bugs present in Firefox ESR 140.8, Thunderbird ESR 140.8, Firefox 148 and Thunderbird 148. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code.
7.5 (High)
Vendor Fix
For details on how to apply this update, which includes the changes described in this advisory, refer to:
https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2026:8427
Product status
Fixed
7Server-ELS:firefox-0:140.9.0-1.el7_9.ppc64
7Server-ELS:firefox-0:140.9.0-1.el7_9.ppc64le
7Server-ELS:firefox-0:140.9.0-1.el7_9.s390x
7Server-ELS:firefox-0:140.9.0-1.el7_9.src
7Server-ELS:firefox-0:140.9.0-1.el7_9.x86_64
7Server-ELS:firefox-debuginfo-0:140.9.0-1.el7_9.ppc64
7Server-ELS:firefox-debuginfo-0:140.9.0-1.el7_9.ppc64le
7Server-ELS:firefox-debuginfo-0:140.9.0-1.el7_9.s390x
Threats
Impact
Important
A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: Memory safety bugs present in Firefox ESR 115.33, Firefox ESR 140.8, Thunderbird ESR 140.8, Firefox 148 and Thunderbird 148. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code.
7.5 (High)
Vendor Fix
For details on how to apply this update, which includes the changes described in this advisory, refer to:
https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2026:8427
Product status
Fixed
7Server-ELS:firefox-0:140.9.0-1.el7_9.ppc64
7Server-ELS:firefox-0:140.9.0-1.el7_9.ppc64le
7Server-ELS:firefox-0:140.9.0-1.el7_9.s390x
7Server-ELS:firefox-0:140.9.0-1.el7_9.src
7Server-ELS:firefox-0:140.9.0-1.el7_9.x86_64
7Server-ELS:firefox-debuginfo-0:140.9.0-1.el7_9.ppc64
7Server-ELS:firefox-debuginfo-0:140.9.0-1.el7_9.ppc64le
7Server-ELS:firefox-debuginfo-0:140.9.0-1.el7_9.s390x
Threats
Impact
Important
References
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"text": "An update for firefox is now available for Red Hat Enterprise Linux 7 Extended Lifecycle Support.\n\nRed Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.",
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"text": "Mozilla Firefox is an open-source web browser, designed for standards compliance, performance, and portability.\n\nSecurity Fix(es):\n\n* firefox: thunderbird: Use-after-free in the JavaScript Engine component (CVE-2026-4701)\n\n* firefox: thunderbird: Memory safety bugs fixed in Firefox ESR 115.34, Firefox ESR 140.9, Thunderbird ESR 140.9, Firefox 149 and Thunderbird 149 (CVE-2026-4721)\n\n* firefox: thunderbird: Privilege escalation in the Netmonitor component (CVE-2026-4717)\n\n* firefox: thunderbird: Sandbox escape due to use-after-free in the Disability Access APIs component (CVE-2026-4688)\n\n* firefox: thunderbird: Incorrect boundary conditions in the Graphics: Canvas2D component (CVE-2026-4706)\n\n* firefox: thunderbird: Incorrect boundary conditions in the Audio/Video: Web Codecs component (CVE-2026-4695)\n\n* firefox: thunderbird: Sandbox escape due to incorrect boundary conditions, integer overflow in the XPCOM component (CVE-2026-4689)\n\n* firefox: thunderbird: JIT miscompilation in the JavaScript Engine: JIT component (CVE-2026-4698)\n\n* firefox: thunderbird: Incorrect boundary conditions, uninitialized memory in the JavaScript Engine component (CVE-2026-4716)\n\n* firefox: thunderbird: Race condition, use-after-free in the Graphics: WebRender component (CVE-2026-4684)\n\n* firefox: thunderbird: Undefined behavior in the WebRTC: Signaling component (CVE-2026-4705)\n\n* firefox: thunderbird: Uninitialized memory in the Graphics: Canvas2D component (CVE-2026-4715)\n\n* firefox: thunderbird: Incorrect boundary conditions in the Graphics: Canvas2D component (CVE-2026-4685)\n\n* firefox: thunderbird: Incorrect boundary conditions in the Audio/Video component (CVE-2026-4714)\n\n* firefox: thunderbird: Incorrect boundary conditions in the Audio/Video: GMP component (CVE-2026-4709)\n\n* firefox: thunderbird: Incorrect boundary conditions in the Audio/Video component (CVE-2026-4710)\n\n* firefox: thunderbird: Information disclosure in the Widget: Cocoa component (CVE-2026-4712)\n\n* firefox: thunderbird: Incorrect boundary conditions in the Audio/Video: Web Codecs component (CVE-2026-4697)\n\n* firefox: thunderbird: Incorrect boundary conditions in the Graphics component (CVE-2026-4713)\n\n* firefox: thunderbird: Sandbox escape due to incorrect boundary conditions, integer overflow in the XPCOM component (CVE-2026-4690)\n\n* firefox: thunderbird: Use-after-free in the Widget: Cocoa component (CVE-2026-4711)\n\n* firefox: thunderbird: Incorrect boundary conditions in the Graphics: Canvas2D component (CVE-2026-4686)\n\n* firefox: thunderbird: Incorrect boundary conditions in the Graphics component (CVE-2026-4708)\n\n* firefox: thunderbird: Use-after-free in the CSS Parsing and Computation component (CVE-2026-4691)\n\n* firefox: thunderbird: Incorrect boundary conditions in the Layout: Text and Fonts component (CVE-2026-4699)\n\n* firefox: thunderbird: Use-after-free in the Layout: Text and Fonts component (CVE-2026-4696)\n\n* firefox: thunderbird: Incorrect boundary conditions in the Audio/Video: Playback component (CVE-2026-4693)\n\n* firefox: thunderbird: Undefined behavior in the WebRTC: Signaling component (CVE-2026-4718)\n\n* firefox: thunderbird: JIT miscompilation in the JavaScript Engine component (CVE-2026-4702)\n\n* firefox: thunderbird: Incorrect boundary conditions in the Graphics: Text component (CVE-2026-4719)\n\n* firefox: thunderbird: Incorrect boundary conditions, integer overflow in the Graphics component (CVE-2026-4694)\n\n* firefox: thunderbird: Sandbox escape in the Responsive Design Mode component (CVE-2026-4692)\n\n* firefox: thunderbird: Memory safety bugs fixed in Firefox ESR 140.9, Thunderbird ESR 140.9, Firefox 149 and Thunderbird 149 (CVE-2026-4720)\n\n* firefox: thunderbird: Mitigation bypass in the Networking: HTTP component (CVE-2026-4700)\n\n* firefox: thunderbird: Incorrect boundary conditions in the Graphics: Canvas2D component (CVE-2026-4707)\n\n* firefox: thunderbird: Denial-of-service in the WebRTC: Signaling component (CVE-2026-4704)\n\n* firefox: thunderbird: Sandbox escape due to incorrect boundary conditions in the Telemetry component (CVE-2026-4687)\n\nFor more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.",
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},
{
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},
{
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},
{
"category": "external",
"summary": "https://www.mozilla.org/security/advisories/mfsa2026-22/#CVE-2026-4719",
"url": "https://www.mozilla.org/security/advisories/mfsa2026-22/#CVE-2026-4719"
},
{
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"url": "https://www.mozilla.org/security/advisories/mfsa2026-24/#CVE-2026-4719"
}
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"userInteraction": "REQUIRED",
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}
],
"threats": [
{
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}
],
"title": "firefox: thunderbird: Incorrect boundary conditions in the Graphics: Text component"
},
{
"cve": "CVE-2026-4720",
"cwe": {
"id": "CWE-120",
"name": "Buffer Copy without Checking Size of Input (\u0027Classic Buffer Overflow\u0027)"
},
"discovery_date": "2026-03-24T13:03:30.400947+00:00",
"ids": [
{
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"text": "2450751"
}
],
"notes": [
{
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"title": "Vulnerability description"
},
{
"category": "summary",
"text": "firefox: thunderbird: Memory safety bugs fixed in Firefox ESR 140.9, Thunderbird ESR 140.9, Firefox 149 and Thunderbird 149",
"title": "Vulnerability summary"
},
{
"category": "other",
"text": "Red Hat Product Security rates the severity of this flaw as determined by the Mozilla Foundation Security Advisory.",
"title": "Statement"
},
{
"category": "general",
"text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
"title": "CVSS score applicability"
}
],
"product_status": {
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},
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{
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"url": "https://www.cve.org/CVERecord?id=CVE-2026-4720"
},
{
"category": "external",
"summary": "https://nvd.nist.gov/vuln/detail/CVE-2026-4720",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-4720"
},
{
"category": "external",
"summary": "https://www.mozilla.org/security/advisories/mfsa2026-22/#CVE-2026-4720",
"url": "https://www.mozilla.org/security/advisories/mfsa2026-22/#CVE-2026-4720"
},
{
"category": "external",
"summary": "https://www.mozilla.org/security/advisories/mfsa2026-24/#CVE-2026-4720",
"url": "https://www.mozilla.org/security/advisories/mfsa2026-24/#CVE-2026-4720"
}
],
"release_date": "2026-03-24T12:30:43.271000+00:00",
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{
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"date": "2026-04-16T10:20:59+00:00",
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},
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"scores": [
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"attackComplexity": "HIGH",
"attackVector": "NETWORK",
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"baseScore": 7.5,
"baseSeverity": "HIGH",
"confidentialityImpact": "HIGH",
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"privilegesRequired": "NONE",
"scope": "UNCHANGED",
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"vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H",
"version": "3.1"
},
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"details": "Important"
}
],
"title": "firefox: thunderbird: Memory safety bugs fixed in Firefox ESR 140.9, Thunderbird ESR 140.9, Firefox 149 and Thunderbird 149"
},
{
"cve": "CVE-2026-4721",
"cwe": {
"id": "CWE-825",
"name": "Expired Pointer Dereference"
},
"discovery_date": "2026-03-24T13:01:21.825225+00:00",
"ids": [
{
"system_name": "Red Hat Bugzilla ID",
"text": "2450711"
}
],
"notes": [
{
"category": "description",
"text": "A flaw was found in Firefox and Thunderbird. The Mozilla Foundation\u0027s Security Advisory describes the following issue:\nMemory safety bugs present in Firefox ESR 115.33, Firefox ESR 140.8, Thunderbird ESR 140.8, Firefox 148 and Thunderbird 148. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code.",
"title": "Vulnerability description"
},
{
"category": "summary",
"text": "firefox: thunderbird: Memory safety bugs fixed in Firefox ESR 115.34, Firefox ESR 140.9, Thunderbird ESR 140.9, Firefox 149 and Thunderbird 149",
"title": "Vulnerability summary"
},
{
"category": "other",
"text": "Red Hat Product Security rates the severity of this flaw as determined by the Mozilla Foundation Security Advisory.",
"title": "Statement"
},
{
"category": "general",
"text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
"title": "CVSS score applicability"
}
],
"product_status": {
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"summary": "Canonical URL",
"url": "https://access.redhat.com/security/cve/CVE-2026-4721"
},
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"summary": "RHBZ#2450711",
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2450711"
},
{
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"url": "https://www.cve.org/CVERecord?id=CVE-2026-4721"
},
{
"category": "external",
"summary": "https://nvd.nist.gov/vuln/detail/CVE-2026-4721",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-4721"
},
{
"category": "external",
"summary": "https://www.mozilla.org/security/advisories/mfsa2026-22/#CVE-2026-4721",
"url": "https://www.mozilla.org/security/advisories/mfsa2026-22/#CVE-2026-4721"
},
{
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"summary": "https://www.mozilla.org/security/advisories/mfsa2026-24/#CVE-2026-4721",
"url": "https://www.mozilla.org/security/advisories/mfsa2026-24/#CVE-2026-4721"
}
],
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{
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"baseScore": 7.5,
"baseSeverity": "HIGH",
"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
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"vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H",
"version": "3.1"
},
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"title": "firefox: thunderbird: Memory safety bugs fixed in Firefox ESR 115.34, Firefox ESR 140.9, Thunderbird ESR 140.9, Firefox 149 and Thunderbird 149"
}
]
}
RHSA-2026:7841
Vulnerability from csaf_redhat - Published: 2026-04-13 10:16 - Updated: 2026-04-28 18:40Summary
Red Hat Security Advisory: firefox security update
Severity
Important
Notes
Topic: An update for firefox is now available for Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions.
Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.
Details: Mozilla Firefox is an open-source web browser, designed for standards compliance, performance, and portability.
Security Fix(es):
* firefox: thunderbird: Use-after-free in the JavaScript Engine component (CVE-2026-4701)
* firefox: thunderbird: Memory safety bugs fixed in Firefox ESR 115.34, Firefox ESR 140.9, Thunderbird ESR 140.9, Firefox 149 and Thunderbird 149 (CVE-2026-4721)
* firefox: thunderbird: Privilege escalation in the Netmonitor component (CVE-2026-4717)
* firefox: thunderbird: Sandbox escape due to use-after-free in the Disability Access APIs component (CVE-2026-4688)
* firefox: thunderbird: Incorrect boundary conditions in the Graphics: Canvas2D component (CVE-2026-4706)
* firefox: thunderbird: Incorrect boundary conditions in the Audio/Video: Web Codecs component (CVE-2026-4695)
* firefox: thunderbird: Sandbox escape due to incorrect boundary conditions, integer overflow in the XPCOM component (CVE-2026-4689)
* firefox: thunderbird: JIT miscompilation in the JavaScript Engine: JIT component (CVE-2026-4698)
* firefox: thunderbird: Incorrect boundary conditions, uninitialized memory in the JavaScript Engine component (CVE-2026-4716)
* firefox: thunderbird: Race condition, use-after-free in the Graphics: WebRender component (CVE-2026-4684)
* firefox: thunderbird: Undefined behavior in the WebRTC: Signaling component (CVE-2026-4705)
* firefox: thunderbird: Uninitialized memory in the Graphics: Canvas2D component (CVE-2026-4715)
* firefox: thunderbird: Incorrect boundary conditions in the Graphics: Canvas2D component (CVE-2026-4685)
* firefox: thunderbird: Incorrect boundary conditions in the Audio/Video component (CVE-2026-4714)
* firefox: thunderbird: Incorrect boundary conditions in the Audio/Video: GMP component (CVE-2026-4709)
* firefox: thunderbird: Incorrect boundary conditions in the Audio/Video component (CVE-2026-4710)
* firefox: thunderbird: Information disclosure in the Widget: Cocoa component (CVE-2026-4712)
* firefox: thunderbird: Incorrect boundary conditions in the Audio/Video: Web Codecs component (CVE-2026-4697)
* firefox: thunderbird: Incorrect boundary conditions in the Graphics component (CVE-2026-4713)
* firefox: thunderbird: Sandbox escape due to incorrect boundary conditions, integer overflow in the XPCOM component (CVE-2026-4690)
* firefox: thunderbird: Use-after-free in the Widget: Cocoa component (CVE-2026-4711)
* firefox: thunderbird: Incorrect boundary conditions in the Graphics: Canvas2D component (CVE-2026-4686)
* firefox: thunderbird: Incorrect boundary conditions in the Graphics component (CVE-2026-4708)
* firefox: thunderbird: Use-after-free in the CSS Parsing and Computation component (CVE-2026-4691)
* firefox: thunderbird: Incorrect boundary conditions in the Layout: Text and Fonts component (CVE-2026-4699)
* firefox: thunderbird: Use-after-free in the Layout: Text and Fonts component (CVE-2026-4696)
* firefox: thunderbird: Incorrect boundary conditions in the Audio/Video: Playback component (CVE-2026-4693)
* firefox: thunderbird: Undefined behavior in the WebRTC: Signaling component (CVE-2026-4718)
* firefox: thunderbird: JIT miscompilation in the JavaScript Engine component (CVE-2026-4702)
* firefox: thunderbird: Incorrect boundary conditions in the Graphics: Text component (CVE-2026-4719)
* firefox: thunderbird: Incorrect boundary conditions, integer overflow in the Graphics component (CVE-2026-4694)
* firefox: thunderbird: Sandbox escape in the Responsive Design Mode component (CVE-2026-4692)
* firefox: thunderbird: Memory safety bugs fixed in Firefox ESR 140.9, Thunderbird ESR 140.9, Firefox 149 and Thunderbird 149 (CVE-2026-4720)
* firefox: thunderbird: Mitigation bypass in the Networking: HTTP component (CVE-2026-4700)
* firefox: thunderbird: Incorrect boundary conditions in the Graphics: Canvas2D component (CVE-2026-4707)
* firefox: thunderbird: Denial-of-service in the WebRTC: Signaling component (CVE-2026-4704)
* firefox: thunderbird: Sandbox escape due to incorrect boundary conditions in the Telemetry component (CVE-2026-4687)
For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.
Terms of Use: This content is licensed under the Creative Commons Attribution 4.0 International License (https://creativecommons.org/licenses/by/4.0/). If you distribute this content, or a modified version of it, you must provide attribution to Red Hat Inc. and provide a link to the original.
A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: Race condition, use-after-free in the Graphics: WebRender component
7.5 (High)
Vendor Fix
For details on how to apply this update, which includes the changes described in this advisory, refer to:
https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2026:7841
Product status
Fixed
AppStream-9.2.0.Z.E4S:firefox-0:140.9.0-1.el9_2.aarch64
AppStream-9.2.0.Z.E4S:firefox-0:140.9.0-1.el9_2.ppc64le
AppStream-9.2.0.Z.E4S:firefox-0:140.9.0-1.el9_2.s390x
AppStream-9.2.0.Z.E4S:firefox-0:140.9.0-1.el9_2.src
AppStream-9.2.0.Z.E4S:firefox-0:140.9.0-1.el9_2.x86_64
AppStream-9.2.0.Z.E4S:firefox-debuginfo-0:140.9.0-1.el9_2.aarch64
AppStream-9.2.0.Z.E4S:firefox-debuginfo-0:140.9.0-1.el9_2.ppc64le
AppStream-9.2.0.Z.E4S:firefox-debuginfo-0:140.9.0-1.el9_2.s390x
AppStream-9.2.0.Z.E4S:firefox-debuginfo-0:140.9.0-1.el9_2.x86_64
AppStream-9.2.0.Z.E4S:firefox-debugsource-0:140.9.0-1.el9_2.aarch64
AppStream-9.2.0.Z.E4S:firefox-debugsource-0:140.9.0-1.el9_2.ppc64le
AppStream-9.2.0.Z.E4S:firefox-debugsource-0:140.9.0-1.el9_2.s390x
AppStream-9.2.0.Z.E4S:firefox-debugsource-0:140.9.0-1.el9_2.x86_64
AppStream-9.2.0.Z.E4S:firefox-x11-0:140.9.0-1.el9_2.aarch64
AppStream-9.2.0.Z.E4S:firefox-x11-0:140.9.0-1.el9_2.ppc64le
AppStream-9.2.0.Z.E4S:firefox-x11-0:140.9.0-1.el9_2.s390x
AppStream-9.2.0.Z.E4S:firefox-x11-0:140.9.0-1.el9_2.x86_64
Threats
Impact
Important
A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: Incorrect boundary conditions in the Graphics: Canvas2D component
7.5 (High)
Vendor Fix
For details on how to apply this update, which includes the changes described in this advisory, refer to:
https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2026:7841
Product status
Fixed
AppStream-9.2.0.Z.E4S:firefox-0:140.9.0-1.el9_2.aarch64
AppStream-9.2.0.Z.E4S:firefox-0:140.9.0-1.el9_2.ppc64le
AppStream-9.2.0.Z.E4S:firefox-0:140.9.0-1.el9_2.s390x
AppStream-9.2.0.Z.E4S:firefox-0:140.9.0-1.el9_2.src
AppStream-9.2.0.Z.E4S:firefox-0:140.9.0-1.el9_2.x86_64
AppStream-9.2.0.Z.E4S:firefox-debuginfo-0:140.9.0-1.el9_2.aarch64
AppStream-9.2.0.Z.E4S:firefox-debuginfo-0:140.9.0-1.el9_2.ppc64le
AppStream-9.2.0.Z.E4S:firefox-debuginfo-0:140.9.0-1.el9_2.s390x
AppStream-9.2.0.Z.E4S:firefox-debuginfo-0:140.9.0-1.el9_2.x86_64
AppStream-9.2.0.Z.E4S:firefox-debugsource-0:140.9.0-1.el9_2.aarch64
AppStream-9.2.0.Z.E4S:firefox-debugsource-0:140.9.0-1.el9_2.ppc64le
AppStream-9.2.0.Z.E4S:firefox-debugsource-0:140.9.0-1.el9_2.s390x
AppStream-9.2.0.Z.E4S:firefox-debugsource-0:140.9.0-1.el9_2.x86_64
AppStream-9.2.0.Z.E4S:firefox-x11-0:140.9.0-1.el9_2.aarch64
AppStream-9.2.0.Z.E4S:firefox-x11-0:140.9.0-1.el9_2.ppc64le
AppStream-9.2.0.Z.E4S:firefox-x11-0:140.9.0-1.el9_2.s390x
AppStream-9.2.0.Z.E4S:firefox-x11-0:140.9.0-1.el9_2.x86_64
Threats
Impact
Important
A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: Incorrect boundary conditions in the Graphics: Canvas2D component
7.5 (High)
Vendor Fix
For details on how to apply this update, which includes the changes described in this advisory, refer to:
https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2026:7841
Product status
Fixed
AppStream-9.2.0.Z.E4S:firefox-0:140.9.0-1.el9_2.aarch64
AppStream-9.2.0.Z.E4S:firefox-0:140.9.0-1.el9_2.ppc64le
AppStream-9.2.0.Z.E4S:firefox-0:140.9.0-1.el9_2.s390x
AppStream-9.2.0.Z.E4S:firefox-0:140.9.0-1.el9_2.src
AppStream-9.2.0.Z.E4S:firefox-0:140.9.0-1.el9_2.x86_64
AppStream-9.2.0.Z.E4S:firefox-debuginfo-0:140.9.0-1.el9_2.aarch64
AppStream-9.2.0.Z.E4S:firefox-debuginfo-0:140.9.0-1.el9_2.ppc64le
AppStream-9.2.0.Z.E4S:firefox-debuginfo-0:140.9.0-1.el9_2.s390x
AppStream-9.2.0.Z.E4S:firefox-debuginfo-0:140.9.0-1.el9_2.x86_64
AppStream-9.2.0.Z.E4S:firefox-debugsource-0:140.9.0-1.el9_2.aarch64
AppStream-9.2.0.Z.E4S:firefox-debugsource-0:140.9.0-1.el9_2.ppc64le
AppStream-9.2.0.Z.E4S:firefox-debugsource-0:140.9.0-1.el9_2.s390x
AppStream-9.2.0.Z.E4S:firefox-debugsource-0:140.9.0-1.el9_2.x86_64
AppStream-9.2.0.Z.E4S:firefox-x11-0:140.9.0-1.el9_2.aarch64
AppStream-9.2.0.Z.E4S:firefox-x11-0:140.9.0-1.el9_2.ppc64le
AppStream-9.2.0.Z.E4S:firefox-x11-0:140.9.0-1.el9_2.s390x
AppStream-9.2.0.Z.E4S:firefox-x11-0:140.9.0-1.el9_2.x86_64
Threats
Impact
Important
A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: Sandbox escape due to incorrect boundary conditions in the Telemetry component
7.5 (High)
Vendor Fix
For details on how to apply this update, which includes the changes described in this advisory, refer to:
https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2026:7841
Product status
Fixed
AppStream-9.2.0.Z.E4S:firefox-0:140.9.0-1.el9_2.aarch64
AppStream-9.2.0.Z.E4S:firefox-0:140.9.0-1.el9_2.ppc64le
AppStream-9.2.0.Z.E4S:firefox-0:140.9.0-1.el9_2.s390x
AppStream-9.2.0.Z.E4S:firefox-0:140.9.0-1.el9_2.src
AppStream-9.2.0.Z.E4S:firefox-0:140.9.0-1.el9_2.x86_64
AppStream-9.2.0.Z.E4S:firefox-debuginfo-0:140.9.0-1.el9_2.aarch64
AppStream-9.2.0.Z.E4S:firefox-debuginfo-0:140.9.0-1.el9_2.ppc64le
AppStream-9.2.0.Z.E4S:firefox-debuginfo-0:140.9.0-1.el9_2.s390x
AppStream-9.2.0.Z.E4S:firefox-debuginfo-0:140.9.0-1.el9_2.x86_64
AppStream-9.2.0.Z.E4S:firefox-debugsource-0:140.9.0-1.el9_2.aarch64
AppStream-9.2.0.Z.E4S:firefox-debugsource-0:140.9.0-1.el9_2.ppc64le
AppStream-9.2.0.Z.E4S:firefox-debugsource-0:140.9.0-1.el9_2.s390x
AppStream-9.2.0.Z.E4S:firefox-debugsource-0:140.9.0-1.el9_2.x86_64
AppStream-9.2.0.Z.E4S:firefox-x11-0:140.9.0-1.el9_2.aarch64
AppStream-9.2.0.Z.E4S:firefox-x11-0:140.9.0-1.el9_2.ppc64le
AppStream-9.2.0.Z.E4S:firefox-x11-0:140.9.0-1.el9_2.s390x
AppStream-9.2.0.Z.E4S:firefox-x11-0:140.9.0-1.el9_2.x86_64
Threats
Impact
Important
A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: Sandbox escape due to use-after-free in the Disability Access APIs component
7.5 (High)
Vendor Fix
For details on how to apply this update, which includes the changes described in this advisory, refer to:
https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2026:7841
Product status
Fixed
AppStream-9.2.0.Z.E4S:firefox-0:140.9.0-1.el9_2.aarch64
AppStream-9.2.0.Z.E4S:firefox-0:140.9.0-1.el9_2.ppc64le
AppStream-9.2.0.Z.E4S:firefox-0:140.9.0-1.el9_2.s390x
AppStream-9.2.0.Z.E4S:firefox-0:140.9.0-1.el9_2.src
AppStream-9.2.0.Z.E4S:firefox-0:140.9.0-1.el9_2.x86_64
AppStream-9.2.0.Z.E4S:firefox-debuginfo-0:140.9.0-1.el9_2.aarch64
AppStream-9.2.0.Z.E4S:firefox-debuginfo-0:140.9.0-1.el9_2.ppc64le
AppStream-9.2.0.Z.E4S:firefox-debuginfo-0:140.9.0-1.el9_2.s390x
AppStream-9.2.0.Z.E4S:firefox-debuginfo-0:140.9.0-1.el9_2.x86_64
AppStream-9.2.0.Z.E4S:firefox-debugsource-0:140.9.0-1.el9_2.aarch64
AppStream-9.2.0.Z.E4S:firefox-debugsource-0:140.9.0-1.el9_2.ppc64le
AppStream-9.2.0.Z.E4S:firefox-debugsource-0:140.9.0-1.el9_2.s390x
AppStream-9.2.0.Z.E4S:firefox-debugsource-0:140.9.0-1.el9_2.x86_64
AppStream-9.2.0.Z.E4S:firefox-x11-0:140.9.0-1.el9_2.aarch64
AppStream-9.2.0.Z.E4S:firefox-x11-0:140.9.0-1.el9_2.ppc64le
AppStream-9.2.0.Z.E4S:firefox-x11-0:140.9.0-1.el9_2.s390x
AppStream-9.2.0.Z.E4S:firefox-x11-0:140.9.0-1.el9_2.x86_64
Threats
Impact
Important
A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: Sandbox escape due to incorrect boundary conditions, integer overflow in the XPCOM component
7.5 (High)
Vendor Fix
For details on how to apply this update, which includes the changes described in this advisory, refer to:
https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2026:7841
Product status
Fixed
AppStream-9.2.0.Z.E4S:firefox-0:140.9.0-1.el9_2.aarch64
AppStream-9.2.0.Z.E4S:firefox-0:140.9.0-1.el9_2.ppc64le
AppStream-9.2.0.Z.E4S:firefox-0:140.9.0-1.el9_2.s390x
AppStream-9.2.0.Z.E4S:firefox-0:140.9.0-1.el9_2.src
AppStream-9.2.0.Z.E4S:firefox-0:140.9.0-1.el9_2.x86_64
AppStream-9.2.0.Z.E4S:firefox-debuginfo-0:140.9.0-1.el9_2.aarch64
AppStream-9.2.0.Z.E4S:firefox-debuginfo-0:140.9.0-1.el9_2.ppc64le
AppStream-9.2.0.Z.E4S:firefox-debuginfo-0:140.9.0-1.el9_2.s390x
AppStream-9.2.0.Z.E4S:firefox-debuginfo-0:140.9.0-1.el9_2.x86_64
AppStream-9.2.0.Z.E4S:firefox-debugsource-0:140.9.0-1.el9_2.aarch64
AppStream-9.2.0.Z.E4S:firefox-debugsource-0:140.9.0-1.el9_2.ppc64le
AppStream-9.2.0.Z.E4S:firefox-debugsource-0:140.9.0-1.el9_2.s390x
AppStream-9.2.0.Z.E4S:firefox-debugsource-0:140.9.0-1.el9_2.x86_64
AppStream-9.2.0.Z.E4S:firefox-x11-0:140.9.0-1.el9_2.aarch64
AppStream-9.2.0.Z.E4S:firefox-x11-0:140.9.0-1.el9_2.ppc64le
AppStream-9.2.0.Z.E4S:firefox-x11-0:140.9.0-1.el9_2.s390x
AppStream-9.2.0.Z.E4S:firefox-x11-0:140.9.0-1.el9_2.x86_64
Threats
Impact
Important
A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: Sandbox escape due to incorrect boundary conditions, integer overflow in the XPCOM component
7.5 (High)
Vendor Fix
For details on how to apply this update, which includes the changes described in this advisory, refer to:
https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2026:7841
Product status
Fixed
AppStream-9.2.0.Z.E4S:firefox-0:140.9.0-1.el9_2.aarch64
AppStream-9.2.0.Z.E4S:firefox-0:140.9.0-1.el9_2.ppc64le
AppStream-9.2.0.Z.E4S:firefox-0:140.9.0-1.el9_2.s390x
AppStream-9.2.0.Z.E4S:firefox-0:140.9.0-1.el9_2.src
AppStream-9.2.0.Z.E4S:firefox-0:140.9.0-1.el9_2.x86_64
AppStream-9.2.0.Z.E4S:firefox-debuginfo-0:140.9.0-1.el9_2.aarch64
AppStream-9.2.0.Z.E4S:firefox-debuginfo-0:140.9.0-1.el9_2.ppc64le
AppStream-9.2.0.Z.E4S:firefox-debuginfo-0:140.9.0-1.el9_2.s390x
AppStream-9.2.0.Z.E4S:firefox-debuginfo-0:140.9.0-1.el9_2.x86_64
AppStream-9.2.0.Z.E4S:firefox-debugsource-0:140.9.0-1.el9_2.aarch64
AppStream-9.2.0.Z.E4S:firefox-debugsource-0:140.9.0-1.el9_2.ppc64le
AppStream-9.2.0.Z.E4S:firefox-debugsource-0:140.9.0-1.el9_2.s390x
AppStream-9.2.0.Z.E4S:firefox-debugsource-0:140.9.0-1.el9_2.x86_64
AppStream-9.2.0.Z.E4S:firefox-x11-0:140.9.0-1.el9_2.aarch64
AppStream-9.2.0.Z.E4S:firefox-x11-0:140.9.0-1.el9_2.ppc64le
AppStream-9.2.0.Z.E4S:firefox-x11-0:140.9.0-1.el9_2.s390x
AppStream-9.2.0.Z.E4S:firefox-x11-0:140.9.0-1.el9_2.x86_64
Threats
Impact
Important
A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: Use-after-free in the CSS Parsing and Computation component
7.5 (High)
Vendor Fix
For details on how to apply this update, which includes the changes described in this advisory, refer to:
https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2026:7841
Product status
Fixed
AppStream-9.2.0.Z.E4S:firefox-0:140.9.0-1.el9_2.aarch64
AppStream-9.2.0.Z.E4S:firefox-0:140.9.0-1.el9_2.ppc64le
AppStream-9.2.0.Z.E4S:firefox-0:140.9.0-1.el9_2.s390x
AppStream-9.2.0.Z.E4S:firefox-0:140.9.0-1.el9_2.src
AppStream-9.2.0.Z.E4S:firefox-0:140.9.0-1.el9_2.x86_64
AppStream-9.2.0.Z.E4S:firefox-debuginfo-0:140.9.0-1.el9_2.aarch64
AppStream-9.2.0.Z.E4S:firefox-debuginfo-0:140.9.0-1.el9_2.ppc64le
AppStream-9.2.0.Z.E4S:firefox-debuginfo-0:140.9.0-1.el9_2.s390x
AppStream-9.2.0.Z.E4S:firefox-debuginfo-0:140.9.0-1.el9_2.x86_64
AppStream-9.2.0.Z.E4S:firefox-debugsource-0:140.9.0-1.el9_2.aarch64
AppStream-9.2.0.Z.E4S:firefox-debugsource-0:140.9.0-1.el9_2.ppc64le
AppStream-9.2.0.Z.E4S:firefox-debugsource-0:140.9.0-1.el9_2.s390x
AppStream-9.2.0.Z.E4S:firefox-debugsource-0:140.9.0-1.el9_2.x86_64
AppStream-9.2.0.Z.E4S:firefox-x11-0:140.9.0-1.el9_2.aarch64
AppStream-9.2.0.Z.E4S:firefox-x11-0:140.9.0-1.el9_2.ppc64le
AppStream-9.2.0.Z.E4S:firefox-x11-0:140.9.0-1.el9_2.s390x
AppStream-9.2.0.Z.E4S:firefox-x11-0:140.9.0-1.el9_2.x86_64
Threats
Impact
Important
A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: Sandbox escape in the Responsive Design Mode component
7.5 (High)
Vendor Fix
For details on how to apply this update, which includes the changes described in this advisory, refer to:
https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2026:7841
Product status
Fixed
AppStream-9.2.0.Z.E4S:firefox-0:140.9.0-1.el9_2.aarch64
AppStream-9.2.0.Z.E4S:firefox-0:140.9.0-1.el9_2.ppc64le
AppStream-9.2.0.Z.E4S:firefox-0:140.9.0-1.el9_2.s390x
AppStream-9.2.0.Z.E4S:firefox-0:140.9.0-1.el9_2.src
AppStream-9.2.0.Z.E4S:firefox-0:140.9.0-1.el9_2.x86_64
AppStream-9.2.0.Z.E4S:firefox-debuginfo-0:140.9.0-1.el9_2.aarch64
AppStream-9.2.0.Z.E4S:firefox-debuginfo-0:140.9.0-1.el9_2.ppc64le
AppStream-9.2.0.Z.E4S:firefox-debuginfo-0:140.9.0-1.el9_2.s390x
AppStream-9.2.0.Z.E4S:firefox-debuginfo-0:140.9.0-1.el9_2.x86_64
AppStream-9.2.0.Z.E4S:firefox-debugsource-0:140.9.0-1.el9_2.aarch64
AppStream-9.2.0.Z.E4S:firefox-debugsource-0:140.9.0-1.el9_2.ppc64le
AppStream-9.2.0.Z.E4S:firefox-debugsource-0:140.9.0-1.el9_2.s390x
AppStream-9.2.0.Z.E4S:firefox-debugsource-0:140.9.0-1.el9_2.x86_64
AppStream-9.2.0.Z.E4S:firefox-x11-0:140.9.0-1.el9_2.aarch64
AppStream-9.2.0.Z.E4S:firefox-x11-0:140.9.0-1.el9_2.ppc64le
AppStream-9.2.0.Z.E4S:firefox-x11-0:140.9.0-1.el9_2.s390x
AppStream-9.2.0.Z.E4S:firefox-x11-0:140.9.0-1.el9_2.x86_64
Threats
Impact
Important
A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: Incorrect boundary conditions in the Audio/Video: Playback component
7.5 (High)
Vendor Fix
For details on how to apply this update, which includes the changes described in this advisory, refer to:
https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2026:7841
Product status
Fixed
AppStream-9.2.0.Z.E4S:firefox-0:140.9.0-1.el9_2.aarch64
AppStream-9.2.0.Z.E4S:firefox-0:140.9.0-1.el9_2.ppc64le
AppStream-9.2.0.Z.E4S:firefox-0:140.9.0-1.el9_2.s390x
AppStream-9.2.0.Z.E4S:firefox-0:140.9.0-1.el9_2.src
AppStream-9.2.0.Z.E4S:firefox-0:140.9.0-1.el9_2.x86_64
AppStream-9.2.0.Z.E4S:firefox-debuginfo-0:140.9.0-1.el9_2.aarch64
AppStream-9.2.0.Z.E4S:firefox-debuginfo-0:140.9.0-1.el9_2.ppc64le
AppStream-9.2.0.Z.E4S:firefox-debuginfo-0:140.9.0-1.el9_2.s390x
AppStream-9.2.0.Z.E4S:firefox-debuginfo-0:140.9.0-1.el9_2.x86_64
AppStream-9.2.0.Z.E4S:firefox-debugsource-0:140.9.0-1.el9_2.aarch64
AppStream-9.2.0.Z.E4S:firefox-debugsource-0:140.9.0-1.el9_2.ppc64le
AppStream-9.2.0.Z.E4S:firefox-debugsource-0:140.9.0-1.el9_2.s390x
AppStream-9.2.0.Z.E4S:firefox-debugsource-0:140.9.0-1.el9_2.x86_64
AppStream-9.2.0.Z.E4S:firefox-x11-0:140.9.0-1.el9_2.aarch64
AppStream-9.2.0.Z.E4S:firefox-x11-0:140.9.0-1.el9_2.ppc64le
AppStream-9.2.0.Z.E4S:firefox-x11-0:140.9.0-1.el9_2.s390x
AppStream-9.2.0.Z.E4S:firefox-x11-0:140.9.0-1.el9_2.x86_64
Threats
Impact
Important
A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: Incorrect boundary conditions, integer overflow in the Graphics component
7.5 (High)
Vendor Fix
For details on how to apply this update, which includes the changes described in this advisory, refer to:
https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2026:7841
Product status
Fixed
AppStream-9.2.0.Z.E4S:firefox-0:140.9.0-1.el9_2.aarch64
AppStream-9.2.0.Z.E4S:firefox-0:140.9.0-1.el9_2.ppc64le
AppStream-9.2.0.Z.E4S:firefox-0:140.9.0-1.el9_2.s390x
AppStream-9.2.0.Z.E4S:firefox-0:140.9.0-1.el9_2.src
AppStream-9.2.0.Z.E4S:firefox-0:140.9.0-1.el9_2.x86_64
AppStream-9.2.0.Z.E4S:firefox-debuginfo-0:140.9.0-1.el9_2.aarch64
AppStream-9.2.0.Z.E4S:firefox-debuginfo-0:140.9.0-1.el9_2.ppc64le
AppStream-9.2.0.Z.E4S:firefox-debuginfo-0:140.9.0-1.el9_2.s390x
AppStream-9.2.0.Z.E4S:firefox-debuginfo-0:140.9.0-1.el9_2.x86_64
AppStream-9.2.0.Z.E4S:firefox-debugsource-0:140.9.0-1.el9_2.aarch64
AppStream-9.2.0.Z.E4S:firefox-debugsource-0:140.9.0-1.el9_2.ppc64le
AppStream-9.2.0.Z.E4S:firefox-debugsource-0:140.9.0-1.el9_2.s390x
AppStream-9.2.0.Z.E4S:firefox-debugsource-0:140.9.0-1.el9_2.x86_64
AppStream-9.2.0.Z.E4S:firefox-x11-0:140.9.0-1.el9_2.aarch64
AppStream-9.2.0.Z.E4S:firefox-x11-0:140.9.0-1.el9_2.ppc64le
AppStream-9.2.0.Z.E4S:firefox-x11-0:140.9.0-1.el9_2.s390x
AppStream-9.2.0.Z.E4S:firefox-x11-0:140.9.0-1.el9_2.x86_64
Threats
Impact
Important
A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: Incorrect boundary conditions in the Audio/Video: Web Codecs component
7.5 (High)
Vendor Fix
For details on how to apply this update, which includes the changes described in this advisory, refer to:
https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2026:7841
Product status
Fixed
AppStream-9.2.0.Z.E4S:firefox-0:140.9.0-1.el9_2.aarch64
AppStream-9.2.0.Z.E4S:firefox-0:140.9.0-1.el9_2.ppc64le
AppStream-9.2.0.Z.E4S:firefox-0:140.9.0-1.el9_2.s390x
AppStream-9.2.0.Z.E4S:firefox-0:140.9.0-1.el9_2.src
AppStream-9.2.0.Z.E4S:firefox-0:140.9.0-1.el9_2.x86_64
AppStream-9.2.0.Z.E4S:firefox-debuginfo-0:140.9.0-1.el9_2.aarch64
AppStream-9.2.0.Z.E4S:firefox-debuginfo-0:140.9.0-1.el9_2.ppc64le
AppStream-9.2.0.Z.E4S:firefox-debuginfo-0:140.9.0-1.el9_2.s390x
AppStream-9.2.0.Z.E4S:firefox-debuginfo-0:140.9.0-1.el9_2.x86_64
AppStream-9.2.0.Z.E4S:firefox-debugsource-0:140.9.0-1.el9_2.aarch64
AppStream-9.2.0.Z.E4S:firefox-debugsource-0:140.9.0-1.el9_2.ppc64le
AppStream-9.2.0.Z.E4S:firefox-debugsource-0:140.9.0-1.el9_2.s390x
AppStream-9.2.0.Z.E4S:firefox-debugsource-0:140.9.0-1.el9_2.x86_64
AppStream-9.2.0.Z.E4S:firefox-x11-0:140.9.0-1.el9_2.aarch64
AppStream-9.2.0.Z.E4S:firefox-x11-0:140.9.0-1.el9_2.ppc64le
AppStream-9.2.0.Z.E4S:firefox-x11-0:140.9.0-1.el9_2.s390x
AppStream-9.2.0.Z.E4S:firefox-x11-0:140.9.0-1.el9_2.x86_64
Threats
Impact
Important
A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: Use-after-free in the Layout: Text and Fonts component
7.5 (High)
Vendor Fix
For details on how to apply this update, which includes the changes described in this advisory, refer to:
https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2026:7841
Product status
Fixed
AppStream-9.2.0.Z.E4S:firefox-0:140.9.0-1.el9_2.aarch64
AppStream-9.2.0.Z.E4S:firefox-0:140.9.0-1.el9_2.ppc64le
AppStream-9.2.0.Z.E4S:firefox-0:140.9.0-1.el9_2.s390x
AppStream-9.2.0.Z.E4S:firefox-0:140.9.0-1.el9_2.src
AppStream-9.2.0.Z.E4S:firefox-0:140.9.0-1.el9_2.x86_64
AppStream-9.2.0.Z.E4S:firefox-debuginfo-0:140.9.0-1.el9_2.aarch64
AppStream-9.2.0.Z.E4S:firefox-debuginfo-0:140.9.0-1.el9_2.ppc64le
AppStream-9.2.0.Z.E4S:firefox-debuginfo-0:140.9.0-1.el9_2.s390x
AppStream-9.2.0.Z.E4S:firefox-debuginfo-0:140.9.0-1.el9_2.x86_64
AppStream-9.2.0.Z.E4S:firefox-debugsource-0:140.9.0-1.el9_2.aarch64
AppStream-9.2.0.Z.E4S:firefox-debugsource-0:140.9.0-1.el9_2.ppc64le
AppStream-9.2.0.Z.E4S:firefox-debugsource-0:140.9.0-1.el9_2.s390x
AppStream-9.2.0.Z.E4S:firefox-debugsource-0:140.9.0-1.el9_2.x86_64
AppStream-9.2.0.Z.E4S:firefox-x11-0:140.9.0-1.el9_2.aarch64
AppStream-9.2.0.Z.E4S:firefox-x11-0:140.9.0-1.el9_2.ppc64le
AppStream-9.2.0.Z.E4S:firefox-x11-0:140.9.0-1.el9_2.s390x
AppStream-9.2.0.Z.E4S:firefox-x11-0:140.9.0-1.el9_2.x86_64
Threats
Impact
Important
A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: Incorrect boundary conditions in the Audio/Video: Web Codecs component
7.5 (High)
Vendor Fix
For details on how to apply this update, which includes the changes described in this advisory, refer to:
https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2026:7841
Product status
Fixed
AppStream-9.2.0.Z.E4S:firefox-0:140.9.0-1.el9_2.aarch64
AppStream-9.2.0.Z.E4S:firefox-0:140.9.0-1.el9_2.ppc64le
AppStream-9.2.0.Z.E4S:firefox-0:140.9.0-1.el9_2.s390x
AppStream-9.2.0.Z.E4S:firefox-0:140.9.0-1.el9_2.src
AppStream-9.2.0.Z.E4S:firefox-0:140.9.0-1.el9_2.x86_64
AppStream-9.2.0.Z.E4S:firefox-debuginfo-0:140.9.0-1.el9_2.aarch64
AppStream-9.2.0.Z.E4S:firefox-debuginfo-0:140.9.0-1.el9_2.ppc64le
AppStream-9.2.0.Z.E4S:firefox-debuginfo-0:140.9.0-1.el9_2.s390x
AppStream-9.2.0.Z.E4S:firefox-debuginfo-0:140.9.0-1.el9_2.x86_64
AppStream-9.2.0.Z.E4S:firefox-debugsource-0:140.9.0-1.el9_2.aarch64
AppStream-9.2.0.Z.E4S:firefox-debugsource-0:140.9.0-1.el9_2.ppc64le
AppStream-9.2.0.Z.E4S:firefox-debugsource-0:140.9.0-1.el9_2.s390x
AppStream-9.2.0.Z.E4S:firefox-debugsource-0:140.9.0-1.el9_2.x86_64
AppStream-9.2.0.Z.E4S:firefox-x11-0:140.9.0-1.el9_2.aarch64
AppStream-9.2.0.Z.E4S:firefox-x11-0:140.9.0-1.el9_2.ppc64le
AppStream-9.2.0.Z.E4S:firefox-x11-0:140.9.0-1.el9_2.s390x
AppStream-9.2.0.Z.E4S:firefox-x11-0:140.9.0-1.el9_2.x86_64
Threats
Impact
Important
A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: JIT miscompilation in the JavaScript Engine: JIT component
7.5 (High)
Vendor Fix
For details on how to apply this update, which includes the changes described in this advisory, refer to:
https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2026:7841
Product status
Fixed
AppStream-9.2.0.Z.E4S:firefox-0:140.9.0-1.el9_2.aarch64
AppStream-9.2.0.Z.E4S:firefox-0:140.9.0-1.el9_2.ppc64le
AppStream-9.2.0.Z.E4S:firefox-0:140.9.0-1.el9_2.s390x
AppStream-9.2.0.Z.E4S:firefox-0:140.9.0-1.el9_2.src
AppStream-9.2.0.Z.E4S:firefox-0:140.9.0-1.el9_2.x86_64
AppStream-9.2.0.Z.E4S:firefox-debuginfo-0:140.9.0-1.el9_2.aarch64
AppStream-9.2.0.Z.E4S:firefox-debuginfo-0:140.9.0-1.el9_2.ppc64le
AppStream-9.2.0.Z.E4S:firefox-debuginfo-0:140.9.0-1.el9_2.s390x
AppStream-9.2.0.Z.E4S:firefox-debuginfo-0:140.9.0-1.el9_2.x86_64
AppStream-9.2.0.Z.E4S:firefox-debugsource-0:140.9.0-1.el9_2.aarch64
AppStream-9.2.0.Z.E4S:firefox-debugsource-0:140.9.0-1.el9_2.ppc64le
AppStream-9.2.0.Z.E4S:firefox-debugsource-0:140.9.0-1.el9_2.s390x
AppStream-9.2.0.Z.E4S:firefox-debugsource-0:140.9.0-1.el9_2.x86_64
AppStream-9.2.0.Z.E4S:firefox-x11-0:140.9.0-1.el9_2.aarch64
AppStream-9.2.0.Z.E4S:firefox-x11-0:140.9.0-1.el9_2.ppc64le
AppStream-9.2.0.Z.E4S:firefox-x11-0:140.9.0-1.el9_2.s390x
AppStream-9.2.0.Z.E4S:firefox-x11-0:140.9.0-1.el9_2.x86_64
Threats
Impact
Important
A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: Incorrect boundary conditions in the Layout: Text and Fonts component
7.5 (High)
Vendor Fix
For details on how to apply this update, which includes the changes described in this advisory, refer to:
https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2026:7841
Product status
Fixed
AppStream-9.2.0.Z.E4S:firefox-0:140.9.0-1.el9_2.aarch64
AppStream-9.2.0.Z.E4S:firefox-0:140.9.0-1.el9_2.ppc64le
AppStream-9.2.0.Z.E4S:firefox-0:140.9.0-1.el9_2.s390x
AppStream-9.2.0.Z.E4S:firefox-0:140.9.0-1.el9_2.src
AppStream-9.2.0.Z.E4S:firefox-0:140.9.0-1.el9_2.x86_64
AppStream-9.2.0.Z.E4S:firefox-debuginfo-0:140.9.0-1.el9_2.aarch64
AppStream-9.2.0.Z.E4S:firefox-debuginfo-0:140.9.0-1.el9_2.ppc64le
AppStream-9.2.0.Z.E4S:firefox-debuginfo-0:140.9.0-1.el9_2.s390x
AppStream-9.2.0.Z.E4S:firefox-debuginfo-0:140.9.0-1.el9_2.x86_64
AppStream-9.2.0.Z.E4S:firefox-debugsource-0:140.9.0-1.el9_2.aarch64
AppStream-9.2.0.Z.E4S:firefox-debugsource-0:140.9.0-1.el9_2.ppc64le
AppStream-9.2.0.Z.E4S:firefox-debugsource-0:140.9.0-1.el9_2.s390x
AppStream-9.2.0.Z.E4S:firefox-debugsource-0:140.9.0-1.el9_2.x86_64
AppStream-9.2.0.Z.E4S:firefox-x11-0:140.9.0-1.el9_2.aarch64
AppStream-9.2.0.Z.E4S:firefox-x11-0:140.9.0-1.el9_2.ppc64le
AppStream-9.2.0.Z.E4S:firefox-x11-0:140.9.0-1.el9_2.s390x
AppStream-9.2.0.Z.E4S:firefox-x11-0:140.9.0-1.el9_2.x86_64
Threats
Impact
Important
A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: Mitigation bypass in the Networking: HTTP component
7.5 (High)
Vendor Fix
For details on how to apply this update, which includes the changes described in this advisory, refer to:
https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2026:7841
Product status
Fixed
AppStream-9.2.0.Z.E4S:firefox-0:140.9.0-1.el9_2.aarch64
AppStream-9.2.0.Z.E4S:firefox-0:140.9.0-1.el9_2.ppc64le
AppStream-9.2.0.Z.E4S:firefox-0:140.9.0-1.el9_2.s390x
AppStream-9.2.0.Z.E4S:firefox-0:140.9.0-1.el9_2.src
AppStream-9.2.0.Z.E4S:firefox-0:140.9.0-1.el9_2.x86_64
AppStream-9.2.0.Z.E4S:firefox-debuginfo-0:140.9.0-1.el9_2.aarch64
AppStream-9.2.0.Z.E4S:firefox-debuginfo-0:140.9.0-1.el9_2.ppc64le
AppStream-9.2.0.Z.E4S:firefox-debuginfo-0:140.9.0-1.el9_2.s390x
AppStream-9.2.0.Z.E4S:firefox-debuginfo-0:140.9.0-1.el9_2.x86_64
AppStream-9.2.0.Z.E4S:firefox-debugsource-0:140.9.0-1.el9_2.aarch64
AppStream-9.2.0.Z.E4S:firefox-debugsource-0:140.9.0-1.el9_2.ppc64le
AppStream-9.2.0.Z.E4S:firefox-debugsource-0:140.9.0-1.el9_2.s390x
AppStream-9.2.0.Z.E4S:firefox-debugsource-0:140.9.0-1.el9_2.x86_64
AppStream-9.2.0.Z.E4S:firefox-x11-0:140.9.0-1.el9_2.aarch64
AppStream-9.2.0.Z.E4S:firefox-x11-0:140.9.0-1.el9_2.ppc64le
AppStream-9.2.0.Z.E4S:firefox-x11-0:140.9.0-1.el9_2.s390x
AppStream-9.2.0.Z.E4S:firefox-x11-0:140.9.0-1.el9_2.x86_64
Threats
Impact
Important
A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: Use-after-free in the JavaScript Engine component
6.1 (Medium)
Vendor Fix
For details on how to apply this update, which includes the changes described in this advisory, refer to:
https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2026:7841
Product status
Fixed
AppStream-9.2.0.Z.E4S:firefox-0:140.9.0-1.el9_2.aarch64
AppStream-9.2.0.Z.E4S:firefox-0:140.9.0-1.el9_2.ppc64le
AppStream-9.2.0.Z.E4S:firefox-0:140.9.0-1.el9_2.s390x
AppStream-9.2.0.Z.E4S:firefox-0:140.9.0-1.el9_2.src
AppStream-9.2.0.Z.E4S:firefox-0:140.9.0-1.el9_2.x86_64
AppStream-9.2.0.Z.E4S:firefox-debuginfo-0:140.9.0-1.el9_2.aarch64
AppStream-9.2.0.Z.E4S:firefox-debuginfo-0:140.9.0-1.el9_2.ppc64le
AppStream-9.2.0.Z.E4S:firefox-debuginfo-0:140.9.0-1.el9_2.s390x
AppStream-9.2.0.Z.E4S:firefox-debuginfo-0:140.9.0-1.el9_2.x86_64
AppStream-9.2.0.Z.E4S:firefox-debugsource-0:140.9.0-1.el9_2.aarch64
AppStream-9.2.0.Z.E4S:firefox-debugsource-0:140.9.0-1.el9_2.ppc64le
AppStream-9.2.0.Z.E4S:firefox-debugsource-0:140.9.0-1.el9_2.s390x
AppStream-9.2.0.Z.E4S:firefox-debugsource-0:140.9.0-1.el9_2.x86_64
AppStream-9.2.0.Z.E4S:firefox-x11-0:140.9.0-1.el9_2.aarch64
AppStream-9.2.0.Z.E4S:firefox-x11-0:140.9.0-1.el9_2.ppc64le
AppStream-9.2.0.Z.E4S:firefox-x11-0:140.9.0-1.el9_2.s390x
AppStream-9.2.0.Z.E4S:firefox-x11-0:140.9.0-1.el9_2.x86_64
Threats
Impact
Moderate
A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: JIT miscompilation in the JavaScript Engine component
6.1 (Medium)
Vendor Fix
For details on how to apply this update, which includes the changes described in this advisory, refer to:
https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2026:7841
Product status
Fixed
AppStream-9.2.0.Z.E4S:firefox-0:140.9.0-1.el9_2.aarch64
AppStream-9.2.0.Z.E4S:firefox-0:140.9.0-1.el9_2.ppc64le
AppStream-9.2.0.Z.E4S:firefox-0:140.9.0-1.el9_2.s390x
AppStream-9.2.0.Z.E4S:firefox-0:140.9.0-1.el9_2.src
AppStream-9.2.0.Z.E4S:firefox-0:140.9.0-1.el9_2.x86_64
AppStream-9.2.0.Z.E4S:firefox-debuginfo-0:140.9.0-1.el9_2.aarch64
AppStream-9.2.0.Z.E4S:firefox-debuginfo-0:140.9.0-1.el9_2.ppc64le
AppStream-9.2.0.Z.E4S:firefox-debuginfo-0:140.9.0-1.el9_2.s390x
AppStream-9.2.0.Z.E4S:firefox-debuginfo-0:140.9.0-1.el9_2.x86_64
AppStream-9.2.0.Z.E4S:firefox-debugsource-0:140.9.0-1.el9_2.aarch64
AppStream-9.2.0.Z.E4S:firefox-debugsource-0:140.9.0-1.el9_2.ppc64le
AppStream-9.2.0.Z.E4S:firefox-debugsource-0:140.9.0-1.el9_2.s390x
AppStream-9.2.0.Z.E4S:firefox-debugsource-0:140.9.0-1.el9_2.x86_64
AppStream-9.2.0.Z.E4S:firefox-x11-0:140.9.0-1.el9_2.aarch64
AppStream-9.2.0.Z.E4S:firefox-x11-0:140.9.0-1.el9_2.ppc64le
AppStream-9.2.0.Z.E4S:firefox-x11-0:140.9.0-1.el9_2.s390x
AppStream-9.2.0.Z.E4S:firefox-x11-0:140.9.0-1.el9_2.x86_64
Threats
Impact
Moderate
A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: Denial-of-service in the WebRTC: Signaling component
7.5 (High)
Vendor Fix
For details on how to apply this update, which includes the changes described in this advisory, refer to:
https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2026:7841
Product status
Fixed
AppStream-9.2.0.Z.E4S:firefox-0:140.9.0-1.el9_2.aarch64
AppStream-9.2.0.Z.E4S:firefox-0:140.9.0-1.el9_2.ppc64le
AppStream-9.2.0.Z.E4S:firefox-0:140.9.0-1.el9_2.s390x
AppStream-9.2.0.Z.E4S:firefox-0:140.9.0-1.el9_2.src
AppStream-9.2.0.Z.E4S:firefox-0:140.9.0-1.el9_2.x86_64
AppStream-9.2.0.Z.E4S:firefox-debuginfo-0:140.9.0-1.el9_2.aarch64
AppStream-9.2.0.Z.E4S:firefox-debuginfo-0:140.9.0-1.el9_2.ppc64le
AppStream-9.2.0.Z.E4S:firefox-debuginfo-0:140.9.0-1.el9_2.s390x
AppStream-9.2.0.Z.E4S:firefox-debuginfo-0:140.9.0-1.el9_2.x86_64
AppStream-9.2.0.Z.E4S:firefox-debugsource-0:140.9.0-1.el9_2.aarch64
AppStream-9.2.0.Z.E4S:firefox-debugsource-0:140.9.0-1.el9_2.ppc64le
AppStream-9.2.0.Z.E4S:firefox-debugsource-0:140.9.0-1.el9_2.s390x
AppStream-9.2.0.Z.E4S:firefox-debugsource-0:140.9.0-1.el9_2.x86_64
AppStream-9.2.0.Z.E4S:firefox-x11-0:140.9.0-1.el9_2.aarch64
AppStream-9.2.0.Z.E4S:firefox-x11-0:140.9.0-1.el9_2.ppc64le
AppStream-9.2.0.Z.E4S:firefox-x11-0:140.9.0-1.el9_2.s390x
AppStream-9.2.0.Z.E4S:firefox-x11-0:140.9.0-1.el9_2.x86_64
Threats
Impact
Moderate
A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: Undefined behavior in the WebRTC: Signaling component
6.5 (Medium)
Vendor Fix
For details on how to apply this update, which includes the changes described in this advisory, refer to:
https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2026:7841
Product status
Fixed
AppStream-9.2.0.Z.E4S:firefox-0:140.9.0-1.el9_2.aarch64
AppStream-9.2.0.Z.E4S:firefox-0:140.9.0-1.el9_2.ppc64le
AppStream-9.2.0.Z.E4S:firefox-0:140.9.0-1.el9_2.s390x
AppStream-9.2.0.Z.E4S:firefox-0:140.9.0-1.el9_2.src
AppStream-9.2.0.Z.E4S:firefox-0:140.9.0-1.el9_2.x86_64
AppStream-9.2.0.Z.E4S:firefox-debuginfo-0:140.9.0-1.el9_2.aarch64
AppStream-9.2.0.Z.E4S:firefox-debuginfo-0:140.9.0-1.el9_2.ppc64le
AppStream-9.2.0.Z.E4S:firefox-debuginfo-0:140.9.0-1.el9_2.s390x
AppStream-9.2.0.Z.E4S:firefox-debuginfo-0:140.9.0-1.el9_2.x86_64
AppStream-9.2.0.Z.E4S:firefox-debugsource-0:140.9.0-1.el9_2.aarch64
AppStream-9.2.0.Z.E4S:firefox-debugsource-0:140.9.0-1.el9_2.ppc64le
AppStream-9.2.0.Z.E4S:firefox-debugsource-0:140.9.0-1.el9_2.s390x
AppStream-9.2.0.Z.E4S:firefox-debugsource-0:140.9.0-1.el9_2.x86_64
AppStream-9.2.0.Z.E4S:firefox-x11-0:140.9.0-1.el9_2.aarch64
AppStream-9.2.0.Z.E4S:firefox-x11-0:140.9.0-1.el9_2.ppc64le
AppStream-9.2.0.Z.E4S:firefox-x11-0:140.9.0-1.el9_2.s390x
AppStream-9.2.0.Z.E4S:firefox-x11-0:140.9.0-1.el9_2.x86_64
Threats
Impact
Moderate
A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: Incorrect boundary conditions in the Graphics: Canvas2D component
6.1 (Medium)
Vendor Fix
For details on how to apply this update, which includes the changes described in this advisory, refer to:
https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2026:7841
Product status
Fixed
AppStream-9.2.0.Z.E4S:firefox-0:140.9.0-1.el9_2.aarch64
AppStream-9.2.0.Z.E4S:firefox-0:140.9.0-1.el9_2.ppc64le
AppStream-9.2.0.Z.E4S:firefox-0:140.9.0-1.el9_2.s390x
AppStream-9.2.0.Z.E4S:firefox-0:140.9.0-1.el9_2.src
AppStream-9.2.0.Z.E4S:firefox-0:140.9.0-1.el9_2.x86_64
AppStream-9.2.0.Z.E4S:firefox-debuginfo-0:140.9.0-1.el9_2.aarch64
AppStream-9.2.0.Z.E4S:firefox-debuginfo-0:140.9.0-1.el9_2.ppc64le
AppStream-9.2.0.Z.E4S:firefox-debuginfo-0:140.9.0-1.el9_2.s390x
AppStream-9.2.0.Z.E4S:firefox-debuginfo-0:140.9.0-1.el9_2.x86_64
AppStream-9.2.0.Z.E4S:firefox-debugsource-0:140.9.0-1.el9_2.aarch64
AppStream-9.2.0.Z.E4S:firefox-debugsource-0:140.9.0-1.el9_2.ppc64le
AppStream-9.2.0.Z.E4S:firefox-debugsource-0:140.9.0-1.el9_2.s390x
AppStream-9.2.0.Z.E4S:firefox-debugsource-0:140.9.0-1.el9_2.x86_64
AppStream-9.2.0.Z.E4S:firefox-x11-0:140.9.0-1.el9_2.aarch64
AppStream-9.2.0.Z.E4S:firefox-x11-0:140.9.0-1.el9_2.ppc64le
AppStream-9.2.0.Z.E4S:firefox-x11-0:140.9.0-1.el9_2.s390x
AppStream-9.2.0.Z.E4S:firefox-x11-0:140.9.0-1.el9_2.x86_64
Threats
Impact
Moderate
A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: Incorrect boundary conditions in the Graphics: Canvas2D component
6.1 (Medium)
Vendor Fix
For details on how to apply this update, which includes the changes described in this advisory, refer to:
https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2026:7841
Product status
Fixed
AppStream-9.2.0.Z.E4S:firefox-0:140.9.0-1.el9_2.aarch64
AppStream-9.2.0.Z.E4S:firefox-0:140.9.0-1.el9_2.ppc64le
AppStream-9.2.0.Z.E4S:firefox-0:140.9.0-1.el9_2.s390x
AppStream-9.2.0.Z.E4S:firefox-0:140.9.0-1.el9_2.src
AppStream-9.2.0.Z.E4S:firefox-0:140.9.0-1.el9_2.x86_64
AppStream-9.2.0.Z.E4S:firefox-debuginfo-0:140.9.0-1.el9_2.aarch64
AppStream-9.2.0.Z.E4S:firefox-debuginfo-0:140.9.0-1.el9_2.ppc64le
AppStream-9.2.0.Z.E4S:firefox-debuginfo-0:140.9.0-1.el9_2.s390x
AppStream-9.2.0.Z.E4S:firefox-debuginfo-0:140.9.0-1.el9_2.x86_64
AppStream-9.2.0.Z.E4S:firefox-debugsource-0:140.9.0-1.el9_2.aarch64
AppStream-9.2.0.Z.E4S:firefox-debugsource-0:140.9.0-1.el9_2.ppc64le
AppStream-9.2.0.Z.E4S:firefox-debugsource-0:140.9.0-1.el9_2.s390x
AppStream-9.2.0.Z.E4S:firefox-debugsource-0:140.9.0-1.el9_2.x86_64
AppStream-9.2.0.Z.E4S:firefox-x11-0:140.9.0-1.el9_2.aarch64
AppStream-9.2.0.Z.E4S:firefox-x11-0:140.9.0-1.el9_2.ppc64le
AppStream-9.2.0.Z.E4S:firefox-x11-0:140.9.0-1.el9_2.s390x
AppStream-9.2.0.Z.E4S:firefox-x11-0:140.9.0-1.el9_2.x86_64
Threats
Impact
Moderate
A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: Incorrect boundary conditions in the Graphics component
6.1 (Medium)
Vendor Fix
For details on how to apply this update, which includes the changes described in this advisory, refer to:
https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2026:7841
Product status
Fixed
AppStream-9.2.0.Z.E4S:firefox-0:140.9.0-1.el9_2.aarch64
AppStream-9.2.0.Z.E4S:firefox-0:140.9.0-1.el9_2.ppc64le
AppStream-9.2.0.Z.E4S:firefox-0:140.9.0-1.el9_2.s390x
AppStream-9.2.0.Z.E4S:firefox-0:140.9.0-1.el9_2.src
AppStream-9.2.0.Z.E4S:firefox-0:140.9.0-1.el9_2.x86_64
AppStream-9.2.0.Z.E4S:firefox-debuginfo-0:140.9.0-1.el9_2.aarch64
AppStream-9.2.0.Z.E4S:firefox-debuginfo-0:140.9.0-1.el9_2.ppc64le
AppStream-9.2.0.Z.E4S:firefox-debuginfo-0:140.9.0-1.el9_2.s390x
AppStream-9.2.0.Z.E4S:firefox-debuginfo-0:140.9.0-1.el9_2.x86_64
AppStream-9.2.0.Z.E4S:firefox-debugsource-0:140.9.0-1.el9_2.aarch64
AppStream-9.2.0.Z.E4S:firefox-debugsource-0:140.9.0-1.el9_2.ppc64le
AppStream-9.2.0.Z.E4S:firefox-debugsource-0:140.9.0-1.el9_2.s390x
AppStream-9.2.0.Z.E4S:firefox-debugsource-0:140.9.0-1.el9_2.x86_64
AppStream-9.2.0.Z.E4S:firefox-x11-0:140.9.0-1.el9_2.aarch64
AppStream-9.2.0.Z.E4S:firefox-x11-0:140.9.0-1.el9_2.ppc64le
AppStream-9.2.0.Z.E4S:firefox-x11-0:140.9.0-1.el9_2.s390x
AppStream-9.2.0.Z.E4S:firefox-x11-0:140.9.0-1.el9_2.x86_64
Threats
Impact
Moderate
A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: Incorrect boundary conditions in the Audio/Video: GMP component
6.1 (Medium)
Vendor Fix
For details on how to apply this update, which includes the changes described in this advisory, refer to:
https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2026:7841
Product status
Fixed
AppStream-9.2.0.Z.E4S:firefox-0:140.9.0-1.el9_2.aarch64
AppStream-9.2.0.Z.E4S:firefox-0:140.9.0-1.el9_2.ppc64le
AppStream-9.2.0.Z.E4S:firefox-0:140.9.0-1.el9_2.s390x
AppStream-9.2.0.Z.E4S:firefox-0:140.9.0-1.el9_2.src
AppStream-9.2.0.Z.E4S:firefox-0:140.9.0-1.el9_2.x86_64
AppStream-9.2.0.Z.E4S:firefox-debuginfo-0:140.9.0-1.el9_2.aarch64
AppStream-9.2.0.Z.E4S:firefox-debuginfo-0:140.9.0-1.el9_2.ppc64le
AppStream-9.2.0.Z.E4S:firefox-debuginfo-0:140.9.0-1.el9_2.s390x
AppStream-9.2.0.Z.E4S:firefox-debuginfo-0:140.9.0-1.el9_2.x86_64
AppStream-9.2.0.Z.E4S:firefox-debugsource-0:140.9.0-1.el9_2.aarch64
AppStream-9.2.0.Z.E4S:firefox-debugsource-0:140.9.0-1.el9_2.ppc64le
AppStream-9.2.0.Z.E4S:firefox-debugsource-0:140.9.0-1.el9_2.s390x
AppStream-9.2.0.Z.E4S:firefox-debugsource-0:140.9.0-1.el9_2.x86_64
AppStream-9.2.0.Z.E4S:firefox-x11-0:140.9.0-1.el9_2.aarch64
AppStream-9.2.0.Z.E4S:firefox-x11-0:140.9.0-1.el9_2.ppc64le
AppStream-9.2.0.Z.E4S:firefox-x11-0:140.9.0-1.el9_2.s390x
AppStream-9.2.0.Z.E4S:firefox-x11-0:140.9.0-1.el9_2.x86_64
Threats
Impact
Moderate
A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: Incorrect boundary conditions in the Audio/Video component
6.1 (Medium)
Vendor Fix
For details on how to apply this update, which includes the changes described in this advisory, refer to:
https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2026:7841
Product status
Fixed
AppStream-9.2.0.Z.E4S:firefox-0:140.9.0-1.el9_2.aarch64
AppStream-9.2.0.Z.E4S:firefox-0:140.9.0-1.el9_2.ppc64le
AppStream-9.2.0.Z.E4S:firefox-0:140.9.0-1.el9_2.s390x
AppStream-9.2.0.Z.E4S:firefox-0:140.9.0-1.el9_2.src
AppStream-9.2.0.Z.E4S:firefox-0:140.9.0-1.el9_2.x86_64
AppStream-9.2.0.Z.E4S:firefox-debuginfo-0:140.9.0-1.el9_2.aarch64
AppStream-9.2.0.Z.E4S:firefox-debuginfo-0:140.9.0-1.el9_2.ppc64le
AppStream-9.2.0.Z.E4S:firefox-debuginfo-0:140.9.0-1.el9_2.s390x
AppStream-9.2.0.Z.E4S:firefox-debuginfo-0:140.9.0-1.el9_2.x86_64
AppStream-9.2.0.Z.E4S:firefox-debugsource-0:140.9.0-1.el9_2.aarch64
AppStream-9.2.0.Z.E4S:firefox-debugsource-0:140.9.0-1.el9_2.ppc64le
AppStream-9.2.0.Z.E4S:firefox-debugsource-0:140.9.0-1.el9_2.s390x
AppStream-9.2.0.Z.E4S:firefox-debugsource-0:140.9.0-1.el9_2.x86_64
AppStream-9.2.0.Z.E4S:firefox-x11-0:140.9.0-1.el9_2.aarch64
AppStream-9.2.0.Z.E4S:firefox-x11-0:140.9.0-1.el9_2.ppc64le
AppStream-9.2.0.Z.E4S:firefox-x11-0:140.9.0-1.el9_2.s390x
AppStream-9.2.0.Z.E4S:firefox-x11-0:140.9.0-1.el9_2.x86_64
Threats
Impact
Moderate
A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: Use-after-free in the Widget: Cocoa component
6.1 (Medium)
Vendor Fix
For details on how to apply this update, which includes the changes described in this advisory, refer to:
https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2026:7841
Product status
Fixed
AppStream-9.2.0.Z.E4S:firefox-0:140.9.0-1.el9_2.aarch64
AppStream-9.2.0.Z.E4S:firefox-0:140.9.0-1.el9_2.ppc64le
AppStream-9.2.0.Z.E4S:firefox-0:140.9.0-1.el9_2.s390x
AppStream-9.2.0.Z.E4S:firefox-0:140.9.0-1.el9_2.src
AppStream-9.2.0.Z.E4S:firefox-0:140.9.0-1.el9_2.x86_64
AppStream-9.2.0.Z.E4S:firefox-debuginfo-0:140.9.0-1.el9_2.aarch64
AppStream-9.2.0.Z.E4S:firefox-debuginfo-0:140.9.0-1.el9_2.ppc64le
AppStream-9.2.0.Z.E4S:firefox-debuginfo-0:140.9.0-1.el9_2.s390x
AppStream-9.2.0.Z.E4S:firefox-debuginfo-0:140.9.0-1.el9_2.x86_64
AppStream-9.2.0.Z.E4S:firefox-debugsource-0:140.9.0-1.el9_2.aarch64
AppStream-9.2.0.Z.E4S:firefox-debugsource-0:140.9.0-1.el9_2.ppc64le
AppStream-9.2.0.Z.E4S:firefox-debugsource-0:140.9.0-1.el9_2.s390x
AppStream-9.2.0.Z.E4S:firefox-debugsource-0:140.9.0-1.el9_2.x86_64
AppStream-9.2.0.Z.E4S:firefox-x11-0:140.9.0-1.el9_2.aarch64
AppStream-9.2.0.Z.E4S:firefox-x11-0:140.9.0-1.el9_2.ppc64le
AppStream-9.2.0.Z.E4S:firefox-x11-0:140.9.0-1.el9_2.s390x
AppStream-9.2.0.Z.E4S:firefox-x11-0:140.9.0-1.el9_2.x86_64
Threats
Impact
Moderate
A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: Information disclosure in the Widget: Cocoa component
6.5 (Medium)
Vendor Fix
For details on how to apply this update, which includes the changes described in this advisory, refer to:
https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2026:7841
Product status
Fixed
AppStream-9.2.0.Z.E4S:firefox-0:140.9.0-1.el9_2.aarch64
AppStream-9.2.0.Z.E4S:firefox-0:140.9.0-1.el9_2.ppc64le
AppStream-9.2.0.Z.E4S:firefox-0:140.9.0-1.el9_2.s390x
AppStream-9.2.0.Z.E4S:firefox-0:140.9.0-1.el9_2.src
AppStream-9.2.0.Z.E4S:firefox-0:140.9.0-1.el9_2.x86_64
AppStream-9.2.0.Z.E4S:firefox-debuginfo-0:140.9.0-1.el9_2.aarch64
AppStream-9.2.0.Z.E4S:firefox-debuginfo-0:140.9.0-1.el9_2.ppc64le
AppStream-9.2.0.Z.E4S:firefox-debuginfo-0:140.9.0-1.el9_2.s390x
AppStream-9.2.0.Z.E4S:firefox-debuginfo-0:140.9.0-1.el9_2.x86_64
AppStream-9.2.0.Z.E4S:firefox-debugsource-0:140.9.0-1.el9_2.aarch64
AppStream-9.2.0.Z.E4S:firefox-debugsource-0:140.9.0-1.el9_2.ppc64le
AppStream-9.2.0.Z.E4S:firefox-debugsource-0:140.9.0-1.el9_2.s390x
AppStream-9.2.0.Z.E4S:firefox-debugsource-0:140.9.0-1.el9_2.x86_64
AppStream-9.2.0.Z.E4S:firefox-x11-0:140.9.0-1.el9_2.aarch64
AppStream-9.2.0.Z.E4S:firefox-x11-0:140.9.0-1.el9_2.ppc64le
AppStream-9.2.0.Z.E4S:firefox-x11-0:140.9.0-1.el9_2.s390x
AppStream-9.2.0.Z.E4S:firefox-x11-0:140.9.0-1.el9_2.x86_64
Threats
Impact
Moderate
A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: Incorrect boundary conditions in the Graphics component
6.1 (Medium)
Vendor Fix
For details on how to apply this update, which includes the changes described in this advisory, refer to:
https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2026:7841
Product status
Fixed
AppStream-9.2.0.Z.E4S:firefox-0:140.9.0-1.el9_2.aarch64
AppStream-9.2.0.Z.E4S:firefox-0:140.9.0-1.el9_2.ppc64le
AppStream-9.2.0.Z.E4S:firefox-0:140.9.0-1.el9_2.s390x
AppStream-9.2.0.Z.E4S:firefox-0:140.9.0-1.el9_2.src
AppStream-9.2.0.Z.E4S:firefox-0:140.9.0-1.el9_2.x86_64
AppStream-9.2.0.Z.E4S:firefox-debuginfo-0:140.9.0-1.el9_2.aarch64
AppStream-9.2.0.Z.E4S:firefox-debuginfo-0:140.9.0-1.el9_2.ppc64le
AppStream-9.2.0.Z.E4S:firefox-debuginfo-0:140.9.0-1.el9_2.s390x
AppStream-9.2.0.Z.E4S:firefox-debuginfo-0:140.9.0-1.el9_2.x86_64
AppStream-9.2.0.Z.E4S:firefox-debugsource-0:140.9.0-1.el9_2.aarch64
AppStream-9.2.0.Z.E4S:firefox-debugsource-0:140.9.0-1.el9_2.ppc64le
AppStream-9.2.0.Z.E4S:firefox-debugsource-0:140.9.0-1.el9_2.s390x
AppStream-9.2.0.Z.E4S:firefox-debugsource-0:140.9.0-1.el9_2.x86_64
AppStream-9.2.0.Z.E4S:firefox-x11-0:140.9.0-1.el9_2.aarch64
AppStream-9.2.0.Z.E4S:firefox-x11-0:140.9.0-1.el9_2.ppc64le
AppStream-9.2.0.Z.E4S:firefox-x11-0:140.9.0-1.el9_2.s390x
AppStream-9.2.0.Z.E4S:firefox-x11-0:140.9.0-1.el9_2.x86_64
Threats
Impact
Moderate
A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: Incorrect boundary conditions in the Audio/Video component
6.5 (Medium)
Vendor Fix
For details on how to apply this update, which includes the changes described in this advisory, refer to:
https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2026:7841
Product status
Fixed
AppStream-9.2.0.Z.E4S:firefox-0:140.9.0-1.el9_2.aarch64
AppStream-9.2.0.Z.E4S:firefox-0:140.9.0-1.el9_2.ppc64le
AppStream-9.2.0.Z.E4S:firefox-0:140.9.0-1.el9_2.s390x
AppStream-9.2.0.Z.E4S:firefox-0:140.9.0-1.el9_2.src
AppStream-9.2.0.Z.E4S:firefox-0:140.9.0-1.el9_2.x86_64
AppStream-9.2.0.Z.E4S:firefox-debuginfo-0:140.9.0-1.el9_2.aarch64
AppStream-9.2.0.Z.E4S:firefox-debuginfo-0:140.9.0-1.el9_2.ppc64le
AppStream-9.2.0.Z.E4S:firefox-debuginfo-0:140.9.0-1.el9_2.s390x
AppStream-9.2.0.Z.E4S:firefox-debuginfo-0:140.9.0-1.el9_2.x86_64
AppStream-9.2.0.Z.E4S:firefox-debugsource-0:140.9.0-1.el9_2.aarch64
AppStream-9.2.0.Z.E4S:firefox-debugsource-0:140.9.0-1.el9_2.ppc64le
AppStream-9.2.0.Z.E4S:firefox-debugsource-0:140.9.0-1.el9_2.s390x
AppStream-9.2.0.Z.E4S:firefox-debugsource-0:140.9.0-1.el9_2.x86_64
AppStream-9.2.0.Z.E4S:firefox-x11-0:140.9.0-1.el9_2.aarch64
AppStream-9.2.0.Z.E4S:firefox-x11-0:140.9.0-1.el9_2.ppc64le
AppStream-9.2.0.Z.E4S:firefox-x11-0:140.9.0-1.el9_2.s390x
AppStream-9.2.0.Z.E4S:firefox-x11-0:140.9.0-1.el9_2.x86_64
Threats
Impact
Moderate
A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: Uninitialized memory in the Graphics: Canvas2D component
6.5 (Medium)
Vendor Fix
For details on how to apply this update, which includes the changes described in this advisory, refer to:
https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2026:7841
Product status
Fixed
AppStream-9.2.0.Z.E4S:firefox-0:140.9.0-1.el9_2.aarch64
AppStream-9.2.0.Z.E4S:firefox-0:140.9.0-1.el9_2.ppc64le
AppStream-9.2.0.Z.E4S:firefox-0:140.9.0-1.el9_2.s390x
AppStream-9.2.0.Z.E4S:firefox-0:140.9.0-1.el9_2.src
AppStream-9.2.0.Z.E4S:firefox-0:140.9.0-1.el9_2.x86_64
AppStream-9.2.0.Z.E4S:firefox-debuginfo-0:140.9.0-1.el9_2.aarch64
AppStream-9.2.0.Z.E4S:firefox-debuginfo-0:140.9.0-1.el9_2.ppc64le
AppStream-9.2.0.Z.E4S:firefox-debuginfo-0:140.9.0-1.el9_2.s390x
AppStream-9.2.0.Z.E4S:firefox-debuginfo-0:140.9.0-1.el9_2.x86_64
AppStream-9.2.0.Z.E4S:firefox-debugsource-0:140.9.0-1.el9_2.aarch64
AppStream-9.2.0.Z.E4S:firefox-debugsource-0:140.9.0-1.el9_2.ppc64le
AppStream-9.2.0.Z.E4S:firefox-debugsource-0:140.9.0-1.el9_2.s390x
AppStream-9.2.0.Z.E4S:firefox-debugsource-0:140.9.0-1.el9_2.x86_64
AppStream-9.2.0.Z.E4S:firefox-x11-0:140.9.0-1.el9_2.aarch64
AppStream-9.2.0.Z.E4S:firefox-x11-0:140.9.0-1.el9_2.ppc64le
AppStream-9.2.0.Z.E4S:firefox-x11-0:140.9.0-1.el9_2.s390x
AppStream-9.2.0.Z.E4S:firefox-x11-0:140.9.0-1.el9_2.x86_64
Threats
Impact
Moderate
A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: Incorrect boundary conditions, uninitialized memory in the JavaScript Engine component
6.1 (Medium)
Vendor Fix
For details on how to apply this update, which includes the changes described in this advisory, refer to:
https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2026:7841
Product status
Fixed
AppStream-9.2.0.Z.E4S:firefox-0:140.9.0-1.el9_2.aarch64
AppStream-9.2.0.Z.E4S:firefox-0:140.9.0-1.el9_2.ppc64le
AppStream-9.2.0.Z.E4S:firefox-0:140.9.0-1.el9_2.s390x
AppStream-9.2.0.Z.E4S:firefox-0:140.9.0-1.el9_2.src
AppStream-9.2.0.Z.E4S:firefox-0:140.9.0-1.el9_2.x86_64
AppStream-9.2.0.Z.E4S:firefox-debuginfo-0:140.9.0-1.el9_2.aarch64
AppStream-9.2.0.Z.E4S:firefox-debuginfo-0:140.9.0-1.el9_2.ppc64le
AppStream-9.2.0.Z.E4S:firefox-debuginfo-0:140.9.0-1.el9_2.s390x
AppStream-9.2.0.Z.E4S:firefox-debuginfo-0:140.9.0-1.el9_2.x86_64
AppStream-9.2.0.Z.E4S:firefox-debugsource-0:140.9.0-1.el9_2.aarch64
AppStream-9.2.0.Z.E4S:firefox-debugsource-0:140.9.0-1.el9_2.ppc64le
AppStream-9.2.0.Z.E4S:firefox-debugsource-0:140.9.0-1.el9_2.s390x
AppStream-9.2.0.Z.E4S:firefox-debugsource-0:140.9.0-1.el9_2.x86_64
AppStream-9.2.0.Z.E4S:firefox-x11-0:140.9.0-1.el9_2.aarch64
AppStream-9.2.0.Z.E4S:firefox-x11-0:140.9.0-1.el9_2.ppc64le
AppStream-9.2.0.Z.E4S:firefox-x11-0:140.9.0-1.el9_2.s390x
AppStream-9.2.0.Z.E4S:firefox-x11-0:140.9.0-1.el9_2.x86_64
Threats
Impact
Moderate
A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: Privilege escalation in the Netmonitor component
6.1 (Medium)
Vendor Fix
For details on how to apply this update, which includes the changes described in this advisory, refer to:
https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2026:7841
Product status
Fixed
AppStream-9.2.0.Z.E4S:firefox-0:140.9.0-1.el9_2.aarch64
AppStream-9.2.0.Z.E4S:firefox-0:140.9.0-1.el9_2.ppc64le
AppStream-9.2.0.Z.E4S:firefox-0:140.9.0-1.el9_2.s390x
AppStream-9.2.0.Z.E4S:firefox-0:140.9.0-1.el9_2.src
AppStream-9.2.0.Z.E4S:firefox-0:140.9.0-1.el9_2.x86_64
AppStream-9.2.0.Z.E4S:firefox-debuginfo-0:140.9.0-1.el9_2.aarch64
AppStream-9.2.0.Z.E4S:firefox-debuginfo-0:140.9.0-1.el9_2.ppc64le
AppStream-9.2.0.Z.E4S:firefox-debuginfo-0:140.9.0-1.el9_2.s390x
AppStream-9.2.0.Z.E4S:firefox-debuginfo-0:140.9.0-1.el9_2.x86_64
AppStream-9.2.0.Z.E4S:firefox-debugsource-0:140.9.0-1.el9_2.aarch64
AppStream-9.2.0.Z.E4S:firefox-debugsource-0:140.9.0-1.el9_2.ppc64le
AppStream-9.2.0.Z.E4S:firefox-debugsource-0:140.9.0-1.el9_2.s390x
AppStream-9.2.0.Z.E4S:firefox-debugsource-0:140.9.0-1.el9_2.x86_64
AppStream-9.2.0.Z.E4S:firefox-x11-0:140.9.0-1.el9_2.aarch64
AppStream-9.2.0.Z.E4S:firefox-x11-0:140.9.0-1.el9_2.ppc64le
AppStream-9.2.0.Z.E4S:firefox-x11-0:140.9.0-1.el9_2.s390x
AppStream-9.2.0.Z.E4S:firefox-x11-0:140.9.0-1.el9_2.x86_64
Threats
Impact
Moderate
A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: Undefined behavior in the WebRTC: Signaling component
CWE-475 - Undefined Behavior for Input to API
Vendor Fix
For details on how to apply this update, which includes the changes described in this advisory, refer to:
https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2026:7841
Product status
Fixed
AppStream-9.2.0.Z.E4S:firefox-0:140.9.0-1.el9_2.aarch64
AppStream-9.2.0.Z.E4S:firefox-0:140.9.0-1.el9_2.ppc64le
AppStream-9.2.0.Z.E4S:firefox-0:140.9.0-1.el9_2.s390x
AppStream-9.2.0.Z.E4S:firefox-0:140.9.0-1.el9_2.src
AppStream-9.2.0.Z.E4S:firefox-0:140.9.0-1.el9_2.x86_64
AppStream-9.2.0.Z.E4S:firefox-debuginfo-0:140.9.0-1.el9_2.aarch64
AppStream-9.2.0.Z.E4S:firefox-debuginfo-0:140.9.0-1.el9_2.ppc64le
AppStream-9.2.0.Z.E4S:firefox-debuginfo-0:140.9.0-1.el9_2.s390x
AppStream-9.2.0.Z.E4S:firefox-debuginfo-0:140.9.0-1.el9_2.x86_64
AppStream-9.2.0.Z.E4S:firefox-debugsource-0:140.9.0-1.el9_2.aarch64
AppStream-9.2.0.Z.E4S:firefox-debugsource-0:140.9.0-1.el9_2.ppc64le
AppStream-9.2.0.Z.E4S:firefox-debugsource-0:140.9.0-1.el9_2.s390x
AppStream-9.2.0.Z.E4S:firefox-debugsource-0:140.9.0-1.el9_2.x86_64
AppStream-9.2.0.Z.E4S:firefox-x11-0:140.9.0-1.el9_2.aarch64
AppStream-9.2.0.Z.E4S:firefox-x11-0:140.9.0-1.el9_2.ppc64le
AppStream-9.2.0.Z.E4S:firefox-x11-0:140.9.0-1.el9_2.s390x
AppStream-9.2.0.Z.E4S:firefox-x11-0:140.9.0-1.el9_2.x86_64
Threats
Impact
Low
A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: Incorrect boundary conditions in the Graphics: Text component
CWE-805 - Buffer Access with Incorrect Length Value
Vendor Fix
For details on how to apply this update, which includes the changes described in this advisory, refer to:
https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2026:7841
Product status
Fixed
AppStream-9.2.0.Z.E4S:firefox-0:140.9.0-1.el9_2.aarch64
AppStream-9.2.0.Z.E4S:firefox-0:140.9.0-1.el9_2.ppc64le
AppStream-9.2.0.Z.E4S:firefox-0:140.9.0-1.el9_2.s390x
AppStream-9.2.0.Z.E4S:firefox-0:140.9.0-1.el9_2.src
AppStream-9.2.0.Z.E4S:firefox-0:140.9.0-1.el9_2.x86_64
AppStream-9.2.0.Z.E4S:firefox-debuginfo-0:140.9.0-1.el9_2.aarch64
AppStream-9.2.0.Z.E4S:firefox-debuginfo-0:140.9.0-1.el9_2.ppc64le
AppStream-9.2.0.Z.E4S:firefox-debuginfo-0:140.9.0-1.el9_2.s390x
AppStream-9.2.0.Z.E4S:firefox-debuginfo-0:140.9.0-1.el9_2.x86_64
AppStream-9.2.0.Z.E4S:firefox-debugsource-0:140.9.0-1.el9_2.aarch64
AppStream-9.2.0.Z.E4S:firefox-debugsource-0:140.9.0-1.el9_2.ppc64le
AppStream-9.2.0.Z.E4S:firefox-debugsource-0:140.9.0-1.el9_2.s390x
AppStream-9.2.0.Z.E4S:firefox-debugsource-0:140.9.0-1.el9_2.x86_64
AppStream-9.2.0.Z.E4S:firefox-x11-0:140.9.0-1.el9_2.aarch64
AppStream-9.2.0.Z.E4S:firefox-x11-0:140.9.0-1.el9_2.ppc64le
AppStream-9.2.0.Z.E4S:firefox-x11-0:140.9.0-1.el9_2.s390x
AppStream-9.2.0.Z.E4S:firefox-x11-0:140.9.0-1.el9_2.x86_64
Threats
Impact
Low
A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: Memory safety bugs present in Firefox ESR 140.8, Thunderbird ESR 140.8, Firefox 148 and Thunderbird 148. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code.
7.5 (High)
Vendor Fix
For details on how to apply this update, which includes the changes described in this advisory, refer to:
https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2026:7841
Product status
Fixed
AppStream-9.2.0.Z.E4S:firefox-0:140.9.0-1.el9_2.aarch64
AppStream-9.2.0.Z.E4S:firefox-0:140.9.0-1.el9_2.ppc64le
AppStream-9.2.0.Z.E4S:firefox-0:140.9.0-1.el9_2.s390x
AppStream-9.2.0.Z.E4S:firefox-0:140.9.0-1.el9_2.src
AppStream-9.2.0.Z.E4S:firefox-0:140.9.0-1.el9_2.x86_64
AppStream-9.2.0.Z.E4S:firefox-debuginfo-0:140.9.0-1.el9_2.aarch64
AppStream-9.2.0.Z.E4S:firefox-debuginfo-0:140.9.0-1.el9_2.ppc64le
AppStream-9.2.0.Z.E4S:firefox-debuginfo-0:140.9.0-1.el9_2.s390x
AppStream-9.2.0.Z.E4S:firefox-debuginfo-0:140.9.0-1.el9_2.x86_64
AppStream-9.2.0.Z.E4S:firefox-debugsource-0:140.9.0-1.el9_2.aarch64
AppStream-9.2.0.Z.E4S:firefox-debugsource-0:140.9.0-1.el9_2.ppc64le
AppStream-9.2.0.Z.E4S:firefox-debugsource-0:140.9.0-1.el9_2.s390x
AppStream-9.2.0.Z.E4S:firefox-debugsource-0:140.9.0-1.el9_2.x86_64
AppStream-9.2.0.Z.E4S:firefox-x11-0:140.9.0-1.el9_2.aarch64
AppStream-9.2.0.Z.E4S:firefox-x11-0:140.9.0-1.el9_2.ppc64le
AppStream-9.2.0.Z.E4S:firefox-x11-0:140.9.0-1.el9_2.s390x
AppStream-9.2.0.Z.E4S:firefox-x11-0:140.9.0-1.el9_2.x86_64
Threats
Impact
Important
A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: Memory safety bugs present in Firefox ESR 115.33, Firefox ESR 140.8, Thunderbird ESR 140.8, Firefox 148 and Thunderbird 148. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code.
7.5 (High)
Vendor Fix
For details on how to apply this update, which includes the changes described in this advisory, refer to:
https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2026:7841
Product status
Fixed
AppStream-9.2.0.Z.E4S:firefox-0:140.9.0-1.el9_2.aarch64
AppStream-9.2.0.Z.E4S:firefox-0:140.9.0-1.el9_2.ppc64le
AppStream-9.2.0.Z.E4S:firefox-0:140.9.0-1.el9_2.s390x
AppStream-9.2.0.Z.E4S:firefox-0:140.9.0-1.el9_2.src
AppStream-9.2.0.Z.E4S:firefox-0:140.9.0-1.el9_2.x86_64
AppStream-9.2.0.Z.E4S:firefox-debuginfo-0:140.9.0-1.el9_2.aarch64
AppStream-9.2.0.Z.E4S:firefox-debuginfo-0:140.9.0-1.el9_2.ppc64le
AppStream-9.2.0.Z.E4S:firefox-debuginfo-0:140.9.0-1.el9_2.s390x
AppStream-9.2.0.Z.E4S:firefox-debuginfo-0:140.9.0-1.el9_2.x86_64
AppStream-9.2.0.Z.E4S:firefox-debugsource-0:140.9.0-1.el9_2.aarch64
AppStream-9.2.0.Z.E4S:firefox-debugsource-0:140.9.0-1.el9_2.ppc64le
AppStream-9.2.0.Z.E4S:firefox-debugsource-0:140.9.0-1.el9_2.s390x
AppStream-9.2.0.Z.E4S:firefox-debugsource-0:140.9.0-1.el9_2.x86_64
AppStream-9.2.0.Z.E4S:firefox-x11-0:140.9.0-1.el9_2.aarch64
AppStream-9.2.0.Z.E4S:firefox-x11-0:140.9.0-1.el9_2.ppc64le
AppStream-9.2.0.Z.E4S:firefox-x11-0:140.9.0-1.el9_2.s390x
AppStream-9.2.0.Z.E4S:firefox-x11-0:140.9.0-1.el9_2.x86_64
Threats
Impact
Important
References
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{
"document": {
"aggregate_severity": {
"namespace": "https://access.redhat.com/security/updates/classification/",
"text": "Important"
},
"category": "csaf_security_advisory",
"csaf_version": "2.0",
"distribution": {
"text": "Copyright \u00a9 Red Hat, Inc. All rights reserved.",
"tlp": {
"label": "WHITE",
"url": "https://www.first.org/tlp/"
}
},
"lang": "en",
"notes": [
{
"category": "summary",
"text": "An update for firefox is now available for Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions.\n\nRed Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.",
"title": "Topic"
},
{
"category": "general",
"text": "Mozilla Firefox is an open-source web browser, designed for standards compliance, performance, and portability.\n\nSecurity Fix(es):\n\n* firefox: thunderbird: Use-after-free in the JavaScript Engine component (CVE-2026-4701)\n\n* firefox: thunderbird: Memory safety bugs fixed in Firefox ESR 115.34, Firefox ESR 140.9, Thunderbird ESR 140.9, Firefox 149 and Thunderbird 149 (CVE-2026-4721)\n\n* firefox: thunderbird: Privilege escalation in the Netmonitor component (CVE-2026-4717)\n\n* firefox: thunderbird: Sandbox escape due to use-after-free in the Disability Access APIs component (CVE-2026-4688)\n\n* firefox: thunderbird: Incorrect boundary conditions in the Graphics: Canvas2D component (CVE-2026-4706)\n\n* firefox: thunderbird: Incorrect boundary conditions in the Audio/Video: Web Codecs component (CVE-2026-4695)\n\n* firefox: thunderbird: Sandbox escape due to incorrect boundary conditions, integer overflow in the XPCOM component (CVE-2026-4689)\n\n* firefox: thunderbird: JIT miscompilation in the JavaScript Engine: JIT component (CVE-2026-4698)\n\n* firefox: thunderbird: Incorrect boundary conditions, uninitialized memory in the JavaScript Engine component (CVE-2026-4716)\n\n* firefox: thunderbird: Race condition, use-after-free in the Graphics: WebRender component (CVE-2026-4684)\n\n* firefox: thunderbird: Undefined behavior in the WebRTC: Signaling component (CVE-2026-4705)\n\n* firefox: thunderbird: Uninitialized memory in the Graphics: Canvas2D component (CVE-2026-4715)\n\n* firefox: thunderbird: Incorrect boundary conditions in the Graphics: Canvas2D component (CVE-2026-4685)\n\n* firefox: thunderbird: Incorrect boundary conditions in the Audio/Video component (CVE-2026-4714)\n\n* firefox: thunderbird: Incorrect boundary conditions in the Audio/Video: GMP component (CVE-2026-4709)\n\n* firefox: thunderbird: Incorrect boundary conditions in the Audio/Video component (CVE-2026-4710)\n\n* firefox: thunderbird: Information disclosure in the Widget: Cocoa component (CVE-2026-4712)\n\n* firefox: thunderbird: Incorrect boundary conditions in the Audio/Video: Web Codecs component (CVE-2026-4697)\n\n* firefox: thunderbird: Incorrect boundary conditions in the Graphics component (CVE-2026-4713)\n\n* firefox: thunderbird: Sandbox escape due to incorrect boundary conditions, integer overflow in the XPCOM component (CVE-2026-4690)\n\n* firefox: thunderbird: Use-after-free in the Widget: Cocoa component (CVE-2026-4711)\n\n* firefox: thunderbird: Incorrect boundary conditions in the Graphics: Canvas2D component (CVE-2026-4686)\n\n* firefox: thunderbird: Incorrect boundary conditions in the Graphics component (CVE-2026-4708)\n\n* firefox: thunderbird: Use-after-free in the CSS Parsing and Computation component (CVE-2026-4691)\n\n* firefox: thunderbird: Incorrect boundary conditions in the Layout: Text and Fonts component (CVE-2026-4699)\n\n* firefox: thunderbird: Use-after-free in the Layout: Text and Fonts component (CVE-2026-4696)\n\n* firefox: thunderbird: Incorrect boundary conditions in the Audio/Video: Playback component (CVE-2026-4693)\n\n* firefox: thunderbird: Undefined behavior in the WebRTC: Signaling component (CVE-2026-4718)\n\n* firefox: thunderbird: JIT miscompilation in the JavaScript Engine component (CVE-2026-4702)\n\n* firefox: thunderbird: Incorrect boundary conditions in the Graphics: Text component (CVE-2026-4719)\n\n* firefox: thunderbird: Incorrect boundary conditions, integer overflow in the Graphics component (CVE-2026-4694)\n\n* firefox: thunderbird: Sandbox escape in the Responsive Design Mode component (CVE-2026-4692)\n\n* firefox: thunderbird: Memory safety bugs fixed in Firefox ESR 140.9, Thunderbird ESR 140.9, Firefox 149 and Thunderbird 149 (CVE-2026-4720)\n\n* firefox: thunderbird: Mitigation bypass in the Networking: HTTP component (CVE-2026-4700)\n\n* firefox: thunderbird: Incorrect boundary conditions in the Graphics: Canvas2D component (CVE-2026-4707)\n\n* firefox: thunderbird: Denial-of-service in the WebRTC: Signaling component (CVE-2026-4704)\n\n* firefox: thunderbird: Sandbox escape due to incorrect boundary conditions in the Telemetry component (CVE-2026-4687)\n\nFor more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.",
"title": "Details"
},
{
"category": "legal_disclaimer",
"text": "This content is licensed under the Creative Commons Attribution 4.0 International License (https://creativecommons.org/licenses/by/4.0/). If you distribute this content, or a modified version of it, you must provide attribution to Red Hat Inc. and provide a link to the original.",
"title": "Terms of Use"
}
],
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{
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RHSA-2026:8290
Vulnerability from csaf_redhat - Published: 2026-04-15 10:57 - Updated: 2026-04-28 18:40Summary
Red Hat Security Advisory: thunderbird security update
Severity
Important
Notes
Topic: An update for thunderbird is now available for Red Hat Enterprise Linux 9.4 Extended Update Support.
Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.
Details: Mozilla Thunderbird is a standalone mail and newsgroup client.
Security Fix(es):
* firefox: thunderbird: Use-after-free in the JavaScript Engine component (CVE-2026-4701)
* firefox: thunderbird: Memory safety bugs fixed in Firefox ESR 115.34, Firefox ESR 140.9, Thunderbird ESR 140.9, Firefox 149 and Thunderbird 149 (CVE-2026-4721)
* firefox: thunderbird: Privilege escalation in the Netmonitor component (CVE-2026-4717)
* firefox: thunderbird: Sandbox escape due to use-after-free in the Disability Access APIs component (CVE-2026-4688)
* firefox: thunderbird: Incorrect boundary conditions in the Graphics: Canvas2D component (CVE-2026-4706)
* firefox: thunderbird: Incorrect boundary conditions in the Audio/Video: Web Codecs component (CVE-2026-4695)
* firefox: thunderbird: Sandbox escape due to incorrect boundary conditions, integer overflow in the XPCOM component (CVE-2026-4689)
* firefox: thunderbird: JIT miscompilation in the JavaScript Engine: JIT component (CVE-2026-4698)
* firefox: thunderbird: Incorrect boundary conditions, uninitialized memory in the JavaScript Engine component (CVE-2026-4716)
* firefox: thunderbird: Race condition, use-after-free in the Graphics: WebRender component (CVE-2026-4684)
* firefox: thunderbird: Undefined behavior in the WebRTC: Signaling component (CVE-2026-4705)
* firefox: thunderbird: Uninitialized memory in the Graphics: Canvas2D component (CVE-2026-4715)
* firefox: thunderbird: Incorrect boundary conditions in the Graphics: Canvas2D component (CVE-2026-4685)
* firefox: thunderbird: Incorrect boundary conditions in the Audio/Video component (CVE-2026-4714)
* firefox: thunderbird: Incorrect boundary conditions in the Audio/Video: GMP component (CVE-2026-4709)
* firefox: thunderbird: Incorrect boundary conditions in the Audio/Video component (CVE-2026-4710)
* firefox: thunderbird: Information disclosure in the Widget: Cocoa component (CVE-2026-4712)
* firefox: thunderbird: Incorrect boundary conditions in the Audio/Video: Web Codecs component (CVE-2026-4697)
* firefox: thunderbird: Incorrect boundary conditions in the Graphics component (CVE-2026-4713)
* firefox: thunderbird: Sandbox escape due to incorrect boundary conditions, integer overflow in the XPCOM component (CVE-2026-4690)
* firefox: thunderbird: Use-after-free in the Widget: Cocoa component (CVE-2026-4711)
* firefox: thunderbird: Incorrect boundary conditions in the Graphics: Canvas2D component (CVE-2026-4686)
* firefox: thunderbird: Incorrect boundary conditions in the Graphics component (CVE-2026-4708)
* firefox: thunderbird: Use-after-free in the CSS Parsing and Computation component (CVE-2026-4691)
* firefox: thunderbird: Incorrect boundary conditions in the Layout: Text and Fonts component (CVE-2026-4699)
* firefox: thunderbird: Use-after-free in the Layout: Text and Fonts component (CVE-2026-4696)
* firefox: thunderbird: Incorrect boundary conditions in the Audio/Video: Playback component (CVE-2026-4693)
* firefox: thunderbird: Undefined behavior in the WebRTC: Signaling component (CVE-2026-4718)
* firefox: thunderbird: JIT miscompilation in the JavaScript Engine component (CVE-2026-4702)
* firefox: thunderbird: Incorrect boundary conditions in the Graphics: Text component (CVE-2026-4719)
* firefox: thunderbird: Incorrect boundary conditions, integer overflow in the Graphics component (CVE-2026-4694)
* firefox: thunderbird: Sandbox escape in the Responsive Design Mode component (CVE-2026-4692)
* firefox: thunderbird: Memory safety bugs fixed in Firefox ESR 140.9, Thunderbird ESR 140.9, Firefox 149 and Thunderbird 149 (CVE-2026-4720)
* firefox: thunderbird: Mitigation bypass in the Networking: HTTP component (CVE-2026-4700)
* firefox: thunderbird: Incorrect boundary conditions in the Graphics: Canvas2D component (CVE-2026-4707)
* firefox: thunderbird: Denial-of-service in the WebRTC: Signaling component (CVE-2026-4704)
* firefox: thunderbird: Sandbox escape due to incorrect boundary conditions in the Telemetry component (CVE-2026-4687)
* thunderbird: Out of bounds read in IMAP parsing (CVE-2026-4371)
* thunderbird: Spoofing issue in Thunderbird (CVE-2026-3889)
For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.
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A flaw was found in Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: Spoofing issue in Thunderbird
5.4 (Medium)
Vendor Fix
For details on how to apply this update, which includes the changes described in this advisory, refer to:
https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2026:8290
Workaround
Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability.
Product status
Fixed
AppStream-9.4.0.Z.EUS:thunderbird-0:140.9.0-1.el9_4.aarch64
AppStream-9.4.0.Z.EUS:thunderbird-0:140.9.0-1.el9_4.ppc64le
AppStream-9.4.0.Z.EUS:thunderbird-0:140.9.0-1.el9_4.s390x
AppStream-9.4.0.Z.EUS:thunderbird-0:140.9.0-1.el9_4.src
AppStream-9.4.0.Z.EUS:thunderbird-0:140.9.0-1.el9_4.x86_64
AppStream-9.4.0.Z.EUS:thunderbird-debuginfo-0:140.9.0-1.el9_4.aarch64
AppStream-9.4.0.Z.EUS:thunderbird-debuginfo-0:140.9.0-1.el9_4.ppc64le
AppStream-9.4.0.Z.EUS:thunderbird-debuginfo-0:140.9.0-1.el9_4.s390x
AppStream-9.4.0.Z.EUS:thunderbird-debuginfo-0:140.9.0-1.el9_4.x86_64
AppStream-9.4.0.Z.EUS:thunderbird-debugsource-0:140.9.0-1.el9_4.aarch64
AppStream-9.4.0.Z.EUS:thunderbird-debugsource-0:140.9.0-1.el9_4.ppc64le
AppStream-9.4.0.Z.EUS:thunderbird-debugsource-0:140.9.0-1.el9_4.s390x
AppStream-9.4.0.Z.EUS:thunderbird-debugsource-0:140.9.0-1.el9_4.x86_64
Threats
Impact
Low
A flaw was found in Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: A malicious mail server could send malformed strings with negative lengths, causing the parser to read memory outside the buffer. If a mail server or connection to a mail server were compromised, an attacker could cause the parser to malfunction, potentially crashing Thunderbird or leaking sensitive data.
8.2 (High)
Vendor Fix
For details on how to apply this update, which includes the changes described in this advisory, refer to:
https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2026:8290
Workaround
Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability.
Product status
Fixed
AppStream-9.4.0.Z.EUS:thunderbird-0:140.9.0-1.el9_4.aarch64
AppStream-9.4.0.Z.EUS:thunderbird-0:140.9.0-1.el9_4.ppc64le
AppStream-9.4.0.Z.EUS:thunderbird-0:140.9.0-1.el9_4.s390x
AppStream-9.4.0.Z.EUS:thunderbird-0:140.9.0-1.el9_4.src
AppStream-9.4.0.Z.EUS:thunderbird-0:140.9.0-1.el9_4.x86_64
AppStream-9.4.0.Z.EUS:thunderbird-debuginfo-0:140.9.0-1.el9_4.aarch64
AppStream-9.4.0.Z.EUS:thunderbird-debuginfo-0:140.9.0-1.el9_4.ppc64le
AppStream-9.4.0.Z.EUS:thunderbird-debuginfo-0:140.9.0-1.el9_4.s390x
AppStream-9.4.0.Z.EUS:thunderbird-debuginfo-0:140.9.0-1.el9_4.x86_64
AppStream-9.4.0.Z.EUS:thunderbird-debugsource-0:140.9.0-1.el9_4.aarch64
AppStream-9.4.0.Z.EUS:thunderbird-debugsource-0:140.9.0-1.el9_4.ppc64le
AppStream-9.4.0.Z.EUS:thunderbird-debugsource-0:140.9.0-1.el9_4.s390x
AppStream-9.4.0.Z.EUS:thunderbird-debugsource-0:140.9.0-1.el9_4.x86_64
Threats
Impact
Important
A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: Race condition, use-after-free in the Graphics: WebRender component
7.5 (High)
Vendor Fix
For details on how to apply this update, which includes the changes described in this advisory, refer to:
https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2026:8290
Product status
Fixed
AppStream-9.4.0.Z.EUS:thunderbird-0:140.9.0-1.el9_4.aarch64
AppStream-9.4.0.Z.EUS:thunderbird-0:140.9.0-1.el9_4.ppc64le
AppStream-9.4.0.Z.EUS:thunderbird-0:140.9.0-1.el9_4.s390x
AppStream-9.4.0.Z.EUS:thunderbird-0:140.9.0-1.el9_4.src
AppStream-9.4.0.Z.EUS:thunderbird-0:140.9.0-1.el9_4.x86_64
AppStream-9.4.0.Z.EUS:thunderbird-debuginfo-0:140.9.0-1.el9_4.aarch64
AppStream-9.4.0.Z.EUS:thunderbird-debuginfo-0:140.9.0-1.el9_4.ppc64le
AppStream-9.4.0.Z.EUS:thunderbird-debuginfo-0:140.9.0-1.el9_4.s390x
AppStream-9.4.0.Z.EUS:thunderbird-debuginfo-0:140.9.0-1.el9_4.x86_64
AppStream-9.4.0.Z.EUS:thunderbird-debugsource-0:140.9.0-1.el9_4.aarch64
AppStream-9.4.0.Z.EUS:thunderbird-debugsource-0:140.9.0-1.el9_4.ppc64le
AppStream-9.4.0.Z.EUS:thunderbird-debugsource-0:140.9.0-1.el9_4.s390x
AppStream-9.4.0.Z.EUS:thunderbird-debugsource-0:140.9.0-1.el9_4.x86_64
Threats
Impact
Important
A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: Incorrect boundary conditions in the Graphics: Canvas2D component
7.5 (High)
Vendor Fix
For details on how to apply this update, which includes the changes described in this advisory, refer to:
https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2026:8290
Product status
Fixed
AppStream-9.4.0.Z.EUS:thunderbird-0:140.9.0-1.el9_4.aarch64
AppStream-9.4.0.Z.EUS:thunderbird-0:140.9.0-1.el9_4.ppc64le
AppStream-9.4.0.Z.EUS:thunderbird-0:140.9.0-1.el9_4.s390x
AppStream-9.4.0.Z.EUS:thunderbird-0:140.9.0-1.el9_4.src
AppStream-9.4.0.Z.EUS:thunderbird-0:140.9.0-1.el9_4.x86_64
AppStream-9.4.0.Z.EUS:thunderbird-debuginfo-0:140.9.0-1.el9_4.aarch64
AppStream-9.4.0.Z.EUS:thunderbird-debuginfo-0:140.9.0-1.el9_4.ppc64le
AppStream-9.4.0.Z.EUS:thunderbird-debuginfo-0:140.9.0-1.el9_4.s390x
AppStream-9.4.0.Z.EUS:thunderbird-debuginfo-0:140.9.0-1.el9_4.x86_64
AppStream-9.4.0.Z.EUS:thunderbird-debugsource-0:140.9.0-1.el9_4.aarch64
AppStream-9.4.0.Z.EUS:thunderbird-debugsource-0:140.9.0-1.el9_4.ppc64le
AppStream-9.4.0.Z.EUS:thunderbird-debugsource-0:140.9.0-1.el9_4.s390x
AppStream-9.4.0.Z.EUS:thunderbird-debugsource-0:140.9.0-1.el9_4.x86_64
Threats
Impact
Important
A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: Incorrect boundary conditions in the Graphics: Canvas2D component
7.5 (High)
Vendor Fix
For details on how to apply this update, which includes the changes described in this advisory, refer to:
https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2026:8290
Product status
Fixed
AppStream-9.4.0.Z.EUS:thunderbird-0:140.9.0-1.el9_4.aarch64
AppStream-9.4.0.Z.EUS:thunderbird-0:140.9.0-1.el9_4.ppc64le
AppStream-9.4.0.Z.EUS:thunderbird-0:140.9.0-1.el9_4.s390x
AppStream-9.4.0.Z.EUS:thunderbird-0:140.9.0-1.el9_4.src
AppStream-9.4.0.Z.EUS:thunderbird-0:140.9.0-1.el9_4.x86_64
AppStream-9.4.0.Z.EUS:thunderbird-debuginfo-0:140.9.0-1.el9_4.aarch64
AppStream-9.4.0.Z.EUS:thunderbird-debuginfo-0:140.9.0-1.el9_4.ppc64le
AppStream-9.4.0.Z.EUS:thunderbird-debuginfo-0:140.9.0-1.el9_4.s390x
AppStream-9.4.0.Z.EUS:thunderbird-debuginfo-0:140.9.0-1.el9_4.x86_64
AppStream-9.4.0.Z.EUS:thunderbird-debugsource-0:140.9.0-1.el9_4.aarch64
AppStream-9.4.0.Z.EUS:thunderbird-debugsource-0:140.9.0-1.el9_4.ppc64le
AppStream-9.4.0.Z.EUS:thunderbird-debugsource-0:140.9.0-1.el9_4.s390x
AppStream-9.4.0.Z.EUS:thunderbird-debugsource-0:140.9.0-1.el9_4.x86_64
Threats
Impact
Important
A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: Sandbox escape due to incorrect boundary conditions in the Telemetry component
7.5 (High)
Vendor Fix
For details on how to apply this update, which includes the changes described in this advisory, refer to:
https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2026:8290
Product status
Fixed
AppStream-9.4.0.Z.EUS:thunderbird-0:140.9.0-1.el9_4.aarch64
AppStream-9.4.0.Z.EUS:thunderbird-0:140.9.0-1.el9_4.ppc64le
AppStream-9.4.0.Z.EUS:thunderbird-0:140.9.0-1.el9_4.s390x
AppStream-9.4.0.Z.EUS:thunderbird-0:140.9.0-1.el9_4.src
AppStream-9.4.0.Z.EUS:thunderbird-0:140.9.0-1.el9_4.x86_64
AppStream-9.4.0.Z.EUS:thunderbird-debuginfo-0:140.9.0-1.el9_4.aarch64
AppStream-9.4.0.Z.EUS:thunderbird-debuginfo-0:140.9.0-1.el9_4.ppc64le
AppStream-9.4.0.Z.EUS:thunderbird-debuginfo-0:140.9.0-1.el9_4.s390x
AppStream-9.4.0.Z.EUS:thunderbird-debuginfo-0:140.9.0-1.el9_4.x86_64
AppStream-9.4.0.Z.EUS:thunderbird-debugsource-0:140.9.0-1.el9_4.aarch64
AppStream-9.4.0.Z.EUS:thunderbird-debugsource-0:140.9.0-1.el9_4.ppc64le
AppStream-9.4.0.Z.EUS:thunderbird-debugsource-0:140.9.0-1.el9_4.s390x
AppStream-9.4.0.Z.EUS:thunderbird-debugsource-0:140.9.0-1.el9_4.x86_64
Threats
Impact
Important
A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: Sandbox escape due to use-after-free in the Disability Access APIs component
7.5 (High)
Vendor Fix
For details on how to apply this update, which includes the changes described in this advisory, refer to:
https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2026:8290
Product status
Fixed
AppStream-9.4.0.Z.EUS:thunderbird-0:140.9.0-1.el9_4.aarch64
AppStream-9.4.0.Z.EUS:thunderbird-0:140.9.0-1.el9_4.ppc64le
AppStream-9.4.0.Z.EUS:thunderbird-0:140.9.0-1.el9_4.s390x
AppStream-9.4.0.Z.EUS:thunderbird-0:140.9.0-1.el9_4.src
AppStream-9.4.0.Z.EUS:thunderbird-0:140.9.0-1.el9_4.x86_64
AppStream-9.4.0.Z.EUS:thunderbird-debuginfo-0:140.9.0-1.el9_4.aarch64
AppStream-9.4.0.Z.EUS:thunderbird-debuginfo-0:140.9.0-1.el9_4.ppc64le
AppStream-9.4.0.Z.EUS:thunderbird-debuginfo-0:140.9.0-1.el9_4.s390x
AppStream-9.4.0.Z.EUS:thunderbird-debuginfo-0:140.9.0-1.el9_4.x86_64
AppStream-9.4.0.Z.EUS:thunderbird-debugsource-0:140.9.0-1.el9_4.aarch64
AppStream-9.4.0.Z.EUS:thunderbird-debugsource-0:140.9.0-1.el9_4.ppc64le
AppStream-9.4.0.Z.EUS:thunderbird-debugsource-0:140.9.0-1.el9_4.s390x
AppStream-9.4.0.Z.EUS:thunderbird-debugsource-0:140.9.0-1.el9_4.x86_64
Threats
Impact
Important
A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: Sandbox escape due to incorrect boundary conditions, integer overflow in the XPCOM component
7.5 (High)
Vendor Fix
For details on how to apply this update, which includes the changes described in this advisory, refer to:
https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2026:8290
Product status
Fixed
AppStream-9.4.0.Z.EUS:thunderbird-0:140.9.0-1.el9_4.aarch64
AppStream-9.4.0.Z.EUS:thunderbird-0:140.9.0-1.el9_4.ppc64le
AppStream-9.4.0.Z.EUS:thunderbird-0:140.9.0-1.el9_4.s390x
AppStream-9.4.0.Z.EUS:thunderbird-0:140.9.0-1.el9_4.src
AppStream-9.4.0.Z.EUS:thunderbird-0:140.9.0-1.el9_4.x86_64
AppStream-9.4.0.Z.EUS:thunderbird-debuginfo-0:140.9.0-1.el9_4.aarch64
AppStream-9.4.0.Z.EUS:thunderbird-debuginfo-0:140.9.0-1.el9_4.ppc64le
AppStream-9.4.0.Z.EUS:thunderbird-debuginfo-0:140.9.0-1.el9_4.s390x
AppStream-9.4.0.Z.EUS:thunderbird-debuginfo-0:140.9.0-1.el9_4.x86_64
AppStream-9.4.0.Z.EUS:thunderbird-debugsource-0:140.9.0-1.el9_4.aarch64
AppStream-9.4.0.Z.EUS:thunderbird-debugsource-0:140.9.0-1.el9_4.ppc64le
AppStream-9.4.0.Z.EUS:thunderbird-debugsource-0:140.9.0-1.el9_4.s390x
AppStream-9.4.0.Z.EUS:thunderbird-debugsource-0:140.9.0-1.el9_4.x86_64
Threats
Impact
Important
A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: Sandbox escape due to incorrect boundary conditions, integer overflow in the XPCOM component
7.5 (High)
Vendor Fix
For details on how to apply this update, which includes the changes described in this advisory, refer to:
https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2026:8290
Product status
Fixed
AppStream-9.4.0.Z.EUS:thunderbird-0:140.9.0-1.el9_4.aarch64
AppStream-9.4.0.Z.EUS:thunderbird-0:140.9.0-1.el9_4.ppc64le
AppStream-9.4.0.Z.EUS:thunderbird-0:140.9.0-1.el9_4.s390x
AppStream-9.4.0.Z.EUS:thunderbird-0:140.9.0-1.el9_4.src
AppStream-9.4.0.Z.EUS:thunderbird-0:140.9.0-1.el9_4.x86_64
AppStream-9.4.0.Z.EUS:thunderbird-debuginfo-0:140.9.0-1.el9_4.aarch64
AppStream-9.4.0.Z.EUS:thunderbird-debuginfo-0:140.9.0-1.el9_4.ppc64le
AppStream-9.4.0.Z.EUS:thunderbird-debuginfo-0:140.9.0-1.el9_4.s390x
AppStream-9.4.0.Z.EUS:thunderbird-debuginfo-0:140.9.0-1.el9_4.x86_64
AppStream-9.4.0.Z.EUS:thunderbird-debugsource-0:140.9.0-1.el9_4.aarch64
AppStream-9.4.0.Z.EUS:thunderbird-debugsource-0:140.9.0-1.el9_4.ppc64le
AppStream-9.4.0.Z.EUS:thunderbird-debugsource-0:140.9.0-1.el9_4.s390x
AppStream-9.4.0.Z.EUS:thunderbird-debugsource-0:140.9.0-1.el9_4.x86_64
Threats
Impact
Important
A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: Use-after-free in the CSS Parsing and Computation component
7.5 (High)
Vendor Fix
For details on how to apply this update, which includes the changes described in this advisory, refer to:
https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2026:8290
Product status
Fixed
AppStream-9.4.0.Z.EUS:thunderbird-0:140.9.0-1.el9_4.aarch64
AppStream-9.4.0.Z.EUS:thunderbird-0:140.9.0-1.el9_4.ppc64le
AppStream-9.4.0.Z.EUS:thunderbird-0:140.9.0-1.el9_4.s390x
AppStream-9.4.0.Z.EUS:thunderbird-0:140.9.0-1.el9_4.src
AppStream-9.4.0.Z.EUS:thunderbird-0:140.9.0-1.el9_4.x86_64
AppStream-9.4.0.Z.EUS:thunderbird-debuginfo-0:140.9.0-1.el9_4.aarch64
AppStream-9.4.0.Z.EUS:thunderbird-debuginfo-0:140.9.0-1.el9_4.ppc64le
AppStream-9.4.0.Z.EUS:thunderbird-debuginfo-0:140.9.0-1.el9_4.s390x
AppStream-9.4.0.Z.EUS:thunderbird-debuginfo-0:140.9.0-1.el9_4.x86_64
AppStream-9.4.0.Z.EUS:thunderbird-debugsource-0:140.9.0-1.el9_4.aarch64
AppStream-9.4.0.Z.EUS:thunderbird-debugsource-0:140.9.0-1.el9_4.ppc64le
AppStream-9.4.0.Z.EUS:thunderbird-debugsource-0:140.9.0-1.el9_4.s390x
AppStream-9.4.0.Z.EUS:thunderbird-debugsource-0:140.9.0-1.el9_4.x86_64
Threats
Impact
Important
A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: Sandbox escape in the Responsive Design Mode component
7.5 (High)
Vendor Fix
For details on how to apply this update, which includes the changes described in this advisory, refer to:
https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2026:8290
Product status
Fixed
AppStream-9.4.0.Z.EUS:thunderbird-0:140.9.0-1.el9_4.aarch64
AppStream-9.4.0.Z.EUS:thunderbird-0:140.9.0-1.el9_4.ppc64le
AppStream-9.4.0.Z.EUS:thunderbird-0:140.9.0-1.el9_4.s390x
AppStream-9.4.0.Z.EUS:thunderbird-0:140.9.0-1.el9_4.src
AppStream-9.4.0.Z.EUS:thunderbird-0:140.9.0-1.el9_4.x86_64
AppStream-9.4.0.Z.EUS:thunderbird-debuginfo-0:140.9.0-1.el9_4.aarch64
AppStream-9.4.0.Z.EUS:thunderbird-debuginfo-0:140.9.0-1.el9_4.ppc64le
AppStream-9.4.0.Z.EUS:thunderbird-debuginfo-0:140.9.0-1.el9_4.s390x
AppStream-9.4.0.Z.EUS:thunderbird-debuginfo-0:140.9.0-1.el9_4.x86_64
AppStream-9.4.0.Z.EUS:thunderbird-debugsource-0:140.9.0-1.el9_4.aarch64
AppStream-9.4.0.Z.EUS:thunderbird-debugsource-0:140.9.0-1.el9_4.ppc64le
AppStream-9.4.0.Z.EUS:thunderbird-debugsource-0:140.9.0-1.el9_4.s390x
AppStream-9.4.0.Z.EUS:thunderbird-debugsource-0:140.9.0-1.el9_4.x86_64
Threats
Impact
Important
A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: Incorrect boundary conditions in the Audio/Video: Playback component
7.5 (High)
Vendor Fix
For details on how to apply this update, which includes the changes described in this advisory, refer to:
https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2026:8290
Product status
Fixed
AppStream-9.4.0.Z.EUS:thunderbird-0:140.9.0-1.el9_4.aarch64
AppStream-9.4.0.Z.EUS:thunderbird-0:140.9.0-1.el9_4.ppc64le
AppStream-9.4.0.Z.EUS:thunderbird-0:140.9.0-1.el9_4.s390x
AppStream-9.4.0.Z.EUS:thunderbird-0:140.9.0-1.el9_4.src
AppStream-9.4.0.Z.EUS:thunderbird-0:140.9.0-1.el9_4.x86_64
AppStream-9.4.0.Z.EUS:thunderbird-debuginfo-0:140.9.0-1.el9_4.aarch64
AppStream-9.4.0.Z.EUS:thunderbird-debuginfo-0:140.9.0-1.el9_4.ppc64le
AppStream-9.4.0.Z.EUS:thunderbird-debuginfo-0:140.9.0-1.el9_4.s390x
AppStream-9.4.0.Z.EUS:thunderbird-debuginfo-0:140.9.0-1.el9_4.x86_64
AppStream-9.4.0.Z.EUS:thunderbird-debugsource-0:140.9.0-1.el9_4.aarch64
AppStream-9.4.0.Z.EUS:thunderbird-debugsource-0:140.9.0-1.el9_4.ppc64le
AppStream-9.4.0.Z.EUS:thunderbird-debugsource-0:140.9.0-1.el9_4.s390x
AppStream-9.4.0.Z.EUS:thunderbird-debugsource-0:140.9.0-1.el9_4.x86_64
Threats
Impact
Important
A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: Incorrect boundary conditions, integer overflow in the Graphics component
7.5 (High)
Vendor Fix
For details on how to apply this update, which includes the changes described in this advisory, refer to:
https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2026:8290
Product status
Fixed
AppStream-9.4.0.Z.EUS:thunderbird-0:140.9.0-1.el9_4.aarch64
AppStream-9.4.0.Z.EUS:thunderbird-0:140.9.0-1.el9_4.ppc64le
AppStream-9.4.0.Z.EUS:thunderbird-0:140.9.0-1.el9_4.s390x
AppStream-9.4.0.Z.EUS:thunderbird-0:140.9.0-1.el9_4.src
AppStream-9.4.0.Z.EUS:thunderbird-0:140.9.0-1.el9_4.x86_64
AppStream-9.4.0.Z.EUS:thunderbird-debuginfo-0:140.9.0-1.el9_4.aarch64
AppStream-9.4.0.Z.EUS:thunderbird-debuginfo-0:140.9.0-1.el9_4.ppc64le
AppStream-9.4.0.Z.EUS:thunderbird-debuginfo-0:140.9.0-1.el9_4.s390x
AppStream-9.4.0.Z.EUS:thunderbird-debuginfo-0:140.9.0-1.el9_4.x86_64
AppStream-9.4.0.Z.EUS:thunderbird-debugsource-0:140.9.0-1.el9_4.aarch64
AppStream-9.4.0.Z.EUS:thunderbird-debugsource-0:140.9.0-1.el9_4.ppc64le
AppStream-9.4.0.Z.EUS:thunderbird-debugsource-0:140.9.0-1.el9_4.s390x
AppStream-9.4.0.Z.EUS:thunderbird-debugsource-0:140.9.0-1.el9_4.x86_64
Threats
Impact
Important
A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: Incorrect boundary conditions in the Audio/Video: Web Codecs component
7.5 (High)
Vendor Fix
For details on how to apply this update, which includes the changes described in this advisory, refer to:
https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2026:8290
Product status
Fixed
AppStream-9.4.0.Z.EUS:thunderbird-0:140.9.0-1.el9_4.aarch64
AppStream-9.4.0.Z.EUS:thunderbird-0:140.9.0-1.el9_4.ppc64le
AppStream-9.4.0.Z.EUS:thunderbird-0:140.9.0-1.el9_4.s390x
AppStream-9.4.0.Z.EUS:thunderbird-0:140.9.0-1.el9_4.src
AppStream-9.4.0.Z.EUS:thunderbird-0:140.9.0-1.el9_4.x86_64
AppStream-9.4.0.Z.EUS:thunderbird-debuginfo-0:140.9.0-1.el9_4.aarch64
AppStream-9.4.0.Z.EUS:thunderbird-debuginfo-0:140.9.0-1.el9_4.ppc64le
AppStream-9.4.0.Z.EUS:thunderbird-debuginfo-0:140.9.0-1.el9_4.s390x
AppStream-9.4.0.Z.EUS:thunderbird-debuginfo-0:140.9.0-1.el9_4.x86_64
AppStream-9.4.0.Z.EUS:thunderbird-debugsource-0:140.9.0-1.el9_4.aarch64
AppStream-9.4.0.Z.EUS:thunderbird-debugsource-0:140.9.0-1.el9_4.ppc64le
AppStream-9.4.0.Z.EUS:thunderbird-debugsource-0:140.9.0-1.el9_4.s390x
AppStream-9.4.0.Z.EUS:thunderbird-debugsource-0:140.9.0-1.el9_4.x86_64
Threats
Impact
Important
A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: Use-after-free in the Layout: Text and Fonts component
7.5 (High)
Vendor Fix
For details on how to apply this update, which includes the changes described in this advisory, refer to:
https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2026:8290
Product status
Fixed
AppStream-9.4.0.Z.EUS:thunderbird-0:140.9.0-1.el9_4.aarch64
AppStream-9.4.0.Z.EUS:thunderbird-0:140.9.0-1.el9_4.ppc64le
AppStream-9.4.0.Z.EUS:thunderbird-0:140.9.0-1.el9_4.s390x
AppStream-9.4.0.Z.EUS:thunderbird-0:140.9.0-1.el9_4.src
AppStream-9.4.0.Z.EUS:thunderbird-0:140.9.0-1.el9_4.x86_64
AppStream-9.4.0.Z.EUS:thunderbird-debuginfo-0:140.9.0-1.el9_4.aarch64
AppStream-9.4.0.Z.EUS:thunderbird-debuginfo-0:140.9.0-1.el9_4.ppc64le
AppStream-9.4.0.Z.EUS:thunderbird-debuginfo-0:140.9.0-1.el9_4.s390x
AppStream-9.4.0.Z.EUS:thunderbird-debuginfo-0:140.9.0-1.el9_4.x86_64
AppStream-9.4.0.Z.EUS:thunderbird-debugsource-0:140.9.0-1.el9_4.aarch64
AppStream-9.4.0.Z.EUS:thunderbird-debugsource-0:140.9.0-1.el9_4.ppc64le
AppStream-9.4.0.Z.EUS:thunderbird-debugsource-0:140.9.0-1.el9_4.s390x
AppStream-9.4.0.Z.EUS:thunderbird-debugsource-0:140.9.0-1.el9_4.x86_64
Threats
Impact
Important
A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: Incorrect boundary conditions in the Audio/Video: Web Codecs component
7.5 (High)
Vendor Fix
For details on how to apply this update, which includes the changes described in this advisory, refer to:
https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2026:8290
Product status
Fixed
AppStream-9.4.0.Z.EUS:thunderbird-0:140.9.0-1.el9_4.aarch64
AppStream-9.4.0.Z.EUS:thunderbird-0:140.9.0-1.el9_4.ppc64le
AppStream-9.4.0.Z.EUS:thunderbird-0:140.9.0-1.el9_4.s390x
AppStream-9.4.0.Z.EUS:thunderbird-0:140.9.0-1.el9_4.src
AppStream-9.4.0.Z.EUS:thunderbird-0:140.9.0-1.el9_4.x86_64
AppStream-9.4.0.Z.EUS:thunderbird-debuginfo-0:140.9.0-1.el9_4.aarch64
AppStream-9.4.0.Z.EUS:thunderbird-debuginfo-0:140.9.0-1.el9_4.ppc64le
AppStream-9.4.0.Z.EUS:thunderbird-debuginfo-0:140.9.0-1.el9_4.s390x
AppStream-9.4.0.Z.EUS:thunderbird-debuginfo-0:140.9.0-1.el9_4.x86_64
AppStream-9.4.0.Z.EUS:thunderbird-debugsource-0:140.9.0-1.el9_4.aarch64
AppStream-9.4.0.Z.EUS:thunderbird-debugsource-0:140.9.0-1.el9_4.ppc64le
AppStream-9.4.0.Z.EUS:thunderbird-debugsource-0:140.9.0-1.el9_4.s390x
AppStream-9.4.0.Z.EUS:thunderbird-debugsource-0:140.9.0-1.el9_4.x86_64
Threats
Impact
Important
A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: JIT miscompilation in the JavaScript Engine: JIT component
7.5 (High)
Vendor Fix
For details on how to apply this update, which includes the changes described in this advisory, refer to:
https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2026:8290
Product status
Fixed
AppStream-9.4.0.Z.EUS:thunderbird-0:140.9.0-1.el9_4.aarch64
AppStream-9.4.0.Z.EUS:thunderbird-0:140.9.0-1.el9_4.ppc64le
AppStream-9.4.0.Z.EUS:thunderbird-0:140.9.0-1.el9_4.s390x
AppStream-9.4.0.Z.EUS:thunderbird-0:140.9.0-1.el9_4.src
AppStream-9.4.0.Z.EUS:thunderbird-0:140.9.0-1.el9_4.x86_64
AppStream-9.4.0.Z.EUS:thunderbird-debuginfo-0:140.9.0-1.el9_4.aarch64
AppStream-9.4.0.Z.EUS:thunderbird-debuginfo-0:140.9.0-1.el9_4.ppc64le
AppStream-9.4.0.Z.EUS:thunderbird-debuginfo-0:140.9.0-1.el9_4.s390x
AppStream-9.4.0.Z.EUS:thunderbird-debuginfo-0:140.9.0-1.el9_4.x86_64
AppStream-9.4.0.Z.EUS:thunderbird-debugsource-0:140.9.0-1.el9_4.aarch64
AppStream-9.4.0.Z.EUS:thunderbird-debugsource-0:140.9.0-1.el9_4.ppc64le
AppStream-9.4.0.Z.EUS:thunderbird-debugsource-0:140.9.0-1.el9_4.s390x
AppStream-9.4.0.Z.EUS:thunderbird-debugsource-0:140.9.0-1.el9_4.x86_64
Threats
Impact
Important
A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: Incorrect boundary conditions in the Layout: Text and Fonts component
7.5 (High)
Vendor Fix
For details on how to apply this update, which includes the changes described in this advisory, refer to:
https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2026:8290
Product status
Fixed
AppStream-9.4.0.Z.EUS:thunderbird-0:140.9.0-1.el9_4.aarch64
AppStream-9.4.0.Z.EUS:thunderbird-0:140.9.0-1.el9_4.ppc64le
AppStream-9.4.0.Z.EUS:thunderbird-0:140.9.0-1.el9_4.s390x
AppStream-9.4.0.Z.EUS:thunderbird-0:140.9.0-1.el9_4.src
AppStream-9.4.0.Z.EUS:thunderbird-0:140.9.0-1.el9_4.x86_64
AppStream-9.4.0.Z.EUS:thunderbird-debuginfo-0:140.9.0-1.el9_4.aarch64
AppStream-9.4.0.Z.EUS:thunderbird-debuginfo-0:140.9.0-1.el9_4.ppc64le
AppStream-9.4.0.Z.EUS:thunderbird-debuginfo-0:140.9.0-1.el9_4.s390x
AppStream-9.4.0.Z.EUS:thunderbird-debuginfo-0:140.9.0-1.el9_4.x86_64
AppStream-9.4.0.Z.EUS:thunderbird-debugsource-0:140.9.0-1.el9_4.aarch64
AppStream-9.4.0.Z.EUS:thunderbird-debugsource-0:140.9.0-1.el9_4.ppc64le
AppStream-9.4.0.Z.EUS:thunderbird-debugsource-0:140.9.0-1.el9_4.s390x
AppStream-9.4.0.Z.EUS:thunderbird-debugsource-0:140.9.0-1.el9_4.x86_64
Threats
Impact
Important
A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: Mitigation bypass in the Networking: HTTP component
7.5 (High)
Vendor Fix
For details on how to apply this update, which includes the changes described in this advisory, refer to:
https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2026:8290
Product status
Fixed
AppStream-9.4.0.Z.EUS:thunderbird-0:140.9.0-1.el9_4.aarch64
AppStream-9.4.0.Z.EUS:thunderbird-0:140.9.0-1.el9_4.ppc64le
AppStream-9.4.0.Z.EUS:thunderbird-0:140.9.0-1.el9_4.s390x
AppStream-9.4.0.Z.EUS:thunderbird-0:140.9.0-1.el9_4.src
AppStream-9.4.0.Z.EUS:thunderbird-0:140.9.0-1.el9_4.x86_64
AppStream-9.4.0.Z.EUS:thunderbird-debuginfo-0:140.9.0-1.el9_4.aarch64
AppStream-9.4.0.Z.EUS:thunderbird-debuginfo-0:140.9.0-1.el9_4.ppc64le
AppStream-9.4.0.Z.EUS:thunderbird-debuginfo-0:140.9.0-1.el9_4.s390x
AppStream-9.4.0.Z.EUS:thunderbird-debuginfo-0:140.9.0-1.el9_4.x86_64
AppStream-9.4.0.Z.EUS:thunderbird-debugsource-0:140.9.0-1.el9_4.aarch64
AppStream-9.4.0.Z.EUS:thunderbird-debugsource-0:140.9.0-1.el9_4.ppc64le
AppStream-9.4.0.Z.EUS:thunderbird-debugsource-0:140.9.0-1.el9_4.s390x
AppStream-9.4.0.Z.EUS:thunderbird-debugsource-0:140.9.0-1.el9_4.x86_64
Threats
Impact
Important
A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: Use-after-free in the JavaScript Engine component
6.1 (Medium)
Vendor Fix
For details on how to apply this update, which includes the changes described in this advisory, refer to:
https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2026:8290
Product status
Fixed
AppStream-9.4.0.Z.EUS:thunderbird-0:140.9.0-1.el9_4.aarch64
AppStream-9.4.0.Z.EUS:thunderbird-0:140.9.0-1.el9_4.ppc64le
AppStream-9.4.0.Z.EUS:thunderbird-0:140.9.0-1.el9_4.s390x
AppStream-9.4.0.Z.EUS:thunderbird-0:140.9.0-1.el9_4.src
AppStream-9.4.0.Z.EUS:thunderbird-0:140.9.0-1.el9_4.x86_64
AppStream-9.4.0.Z.EUS:thunderbird-debuginfo-0:140.9.0-1.el9_4.aarch64
AppStream-9.4.0.Z.EUS:thunderbird-debuginfo-0:140.9.0-1.el9_4.ppc64le
AppStream-9.4.0.Z.EUS:thunderbird-debuginfo-0:140.9.0-1.el9_4.s390x
AppStream-9.4.0.Z.EUS:thunderbird-debuginfo-0:140.9.0-1.el9_4.x86_64
AppStream-9.4.0.Z.EUS:thunderbird-debugsource-0:140.9.0-1.el9_4.aarch64
AppStream-9.4.0.Z.EUS:thunderbird-debugsource-0:140.9.0-1.el9_4.ppc64le
AppStream-9.4.0.Z.EUS:thunderbird-debugsource-0:140.9.0-1.el9_4.s390x
AppStream-9.4.0.Z.EUS:thunderbird-debugsource-0:140.9.0-1.el9_4.x86_64
Threats
Impact
Moderate
A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: JIT miscompilation in the JavaScript Engine component
6.1 (Medium)
Vendor Fix
For details on how to apply this update, which includes the changes described in this advisory, refer to:
https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2026:8290
Product status
Fixed
AppStream-9.4.0.Z.EUS:thunderbird-0:140.9.0-1.el9_4.aarch64
AppStream-9.4.0.Z.EUS:thunderbird-0:140.9.0-1.el9_4.ppc64le
AppStream-9.4.0.Z.EUS:thunderbird-0:140.9.0-1.el9_4.s390x
AppStream-9.4.0.Z.EUS:thunderbird-0:140.9.0-1.el9_4.src
AppStream-9.4.0.Z.EUS:thunderbird-0:140.9.0-1.el9_4.x86_64
AppStream-9.4.0.Z.EUS:thunderbird-debuginfo-0:140.9.0-1.el9_4.aarch64
AppStream-9.4.0.Z.EUS:thunderbird-debuginfo-0:140.9.0-1.el9_4.ppc64le
AppStream-9.4.0.Z.EUS:thunderbird-debuginfo-0:140.9.0-1.el9_4.s390x
AppStream-9.4.0.Z.EUS:thunderbird-debuginfo-0:140.9.0-1.el9_4.x86_64
AppStream-9.4.0.Z.EUS:thunderbird-debugsource-0:140.9.0-1.el9_4.aarch64
AppStream-9.4.0.Z.EUS:thunderbird-debugsource-0:140.9.0-1.el9_4.ppc64le
AppStream-9.4.0.Z.EUS:thunderbird-debugsource-0:140.9.0-1.el9_4.s390x
AppStream-9.4.0.Z.EUS:thunderbird-debugsource-0:140.9.0-1.el9_4.x86_64
Threats
Impact
Moderate
A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: Denial-of-service in the WebRTC: Signaling component
7.5 (High)
Vendor Fix
For details on how to apply this update, which includes the changes described in this advisory, refer to:
https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2026:8290
Product status
Fixed
AppStream-9.4.0.Z.EUS:thunderbird-0:140.9.0-1.el9_4.aarch64
AppStream-9.4.0.Z.EUS:thunderbird-0:140.9.0-1.el9_4.ppc64le
AppStream-9.4.0.Z.EUS:thunderbird-0:140.9.0-1.el9_4.s390x
AppStream-9.4.0.Z.EUS:thunderbird-0:140.9.0-1.el9_4.src
AppStream-9.4.0.Z.EUS:thunderbird-0:140.9.0-1.el9_4.x86_64
AppStream-9.4.0.Z.EUS:thunderbird-debuginfo-0:140.9.0-1.el9_4.aarch64
AppStream-9.4.0.Z.EUS:thunderbird-debuginfo-0:140.9.0-1.el9_4.ppc64le
AppStream-9.4.0.Z.EUS:thunderbird-debuginfo-0:140.9.0-1.el9_4.s390x
AppStream-9.4.0.Z.EUS:thunderbird-debuginfo-0:140.9.0-1.el9_4.x86_64
AppStream-9.4.0.Z.EUS:thunderbird-debugsource-0:140.9.0-1.el9_4.aarch64
AppStream-9.4.0.Z.EUS:thunderbird-debugsource-0:140.9.0-1.el9_4.ppc64le
AppStream-9.4.0.Z.EUS:thunderbird-debugsource-0:140.9.0-1.el9_4.s390x
AppStream-9.4.0.Z.EUS:thunderbird-debugsource-0:140.9.0-1.el9_4.x86_64
Threats
Impact
Moderate
A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: Undefined behavior in the WebRTC: Signaling component
6.5 (Medium)
Vendor Fix
For details on how to apply this update, which includes the changes described in this advisory, refer to:
https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2026:8290
Product status
Fixed
AppStream-9.4.0.Z.EUS:thunderbird-0:140.9.0-1.el9_4.aarch64
AppStream-9.4.0.Z.EUS:thunderbird-0:140.9.0-1.el9_4.ppc64le
AppStream-9.4.0.Z.EUS:thunderbird-0:140.9.0-1.el9_4.s390x
AppStream-9.4.0.Z.EUS:thunderbird-0:140.9.0-1.el9_4.src
AppStream-9.4.0.Z.EUS:thunderbird-0:140.9.0-1.el9_4.x86_64
AppStream-9.4.0.Z.EUS:thunderbird-debuginfo-0:140.9.0-1.el9_4.aarch64
AppStream-9.4.0.Z.EUS:thunderbird-debuginfo-0:140.9.0-1.el9_4.ppc64le
AppStream-9.4.0.Z.EUS:thunderbird-debuginfo-0:140.9.0-1.el9_4.s390x
AppStream-9.4.0.Z.EUS:thunderbird-debuginfo-0:140.9.0-1.el9_4.x86_64
AppStream-9.4.0.Z.EUS:thunderbird-debugsource-0:140.9.0-1.el9_4.aarch64
AppStream-9.4.0.Z.EUS:thunderbird-debugsource-0:140.9.0-1.el9_4.ppc64le
AppStream-9.4.0.Z.EUS:thunderbird-debugsource-0:140.9.0-1.el9_4.s390x
AppStream-9.4.0.Z.EUS:thunderbird-debugsource-0:140.9.0-1.el9_4.x86_64
Threats
Impact
Moderate
A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: Incorrect boundary conditions in the Graphics: Canvas2D component
6.1 (Medium)
Vendor Fix
For details on how to apply this update, which includes the changes described in this advisory, refer to:
https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2026:8290
Product status
Fixed
AppStream-9.4.0.Z.EUS:thunderbird-0:140.9.0-1.el9_4.aarch64
AppStream-9.4.0.Z.EUS:thunderbird-0:140.9.0-1.el9_4.ppc64le
AppStream-9.4.0.Z.EUS:thunderbird-0:140.9.0-1.el9_4.s390x
AppStream-9.4.0.Z.EUS:thunderbird-0:140.9.0-1.el9_4.src
AppStream-9.4.0.Z.EUS:thunderbird-0:140.9.0-1.el9_4.x86_64
AppStream-9.4.0.Z.EUS:thunderbird-debuginfo-0:140.9.0-1.el9_4.aarch64
AppStream-9.4.0.Z.EUS:thunderbird-debuginfo-0:140.9.0-1.el9_4.ppc64le
AppStream-9.4.0.Z.EUS:thunderbird-debuginfo-0:140.9.0-1.el9_4.s390x
AppStream-9.4.0.Z.EUS:thunderbird-debuginfo-0:140.9.0-1.el9_4.x86_64
AppStream-9.4.0.Z.EUS:thunderbird-debugsource-0:140.9.0-1.el9_4.aarch64
AppStream-9.4.0.Z.EUS:thunderbird-debugsource-0:140.9.0-1.el9_4.ppc64le
AppStream-9.4.0.Z.EUS:thunderbird-debugsource-0:140.9.0-1.el9_4.s390x
AppStream-9.4.0.Z.EUS:thunderbird-debugsource-0:140.9.0-1.el9_4.x86_64
Threats
Impact
Moderate
A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: Incorrect boundary conditions in the Graphics: Canvas2D component
6.1 (Medium)
Vendor Fix
For details on how to apply this update, which includes the changes described in this advisory, refer to:
https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2026:8290
Product status
Fixed
AppStream-9.4.0.Z.EUS:thunderbird-0:140.9.0-1.el9_4.aarch64
AppStream-9.4.0.Z.EUS:thunderbird-0:140.9.0-1.el9_4.ppc64le
AppStream-9.4.0.Z.EUS:thunderbird-0:140.9.0-1.el9_4.s390x
AppStream-9.4.0.Z.EUS:thunderbird-0:140.9.0-1.el9_4.src
AppStream-9.4.0.Z.EUS:thunderbird-0:140.9.0-1.el9_4.x86_64
AppStream-9.4.0.Z.EUS:thunderbird-debuginfo-0:140.9.0-1.el9_4.aarch64
AppStream-9.4.0.Z.EUS:thunderbird-debuginfo-0:140.9.0-1.el9_4.ppc64le
AppStream-9.4.0.Z.EUS:thunderbird-debuginfo-0:140.9.0-1.el9_4.s390x
AppStream-9.4.0.Z.EUS:thunderbird-debuginfo-0:140.9.0-1.el9_4.x86_64
AppStream-9.4.0.Z.EUS:thunderbird-debugsource-0:140.9.0-1.el9_4.aarch64
AppStream-9.4.0.Z.EUS:thunderbird-debugsource-0:140.9.0-1.el9_4.ppc64le
AppStream-9.4.0.Z.EUS:thunderbird-debugsource-0:140.9.0-1.el9_4.s390x
AppStream-9.4.0.Z.EUS:thunderbird-debugsource-0:140.9.0-1.el9_4.x86_64
Threats
Impact
Moderate
A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: Incorrect boundary conditions in the Graphics component
6.1 (Medium)
Vendor Fix
For details on how to apply this update, which includes the changes described in this advisory, refer to:
https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2026:8290
Product status
Fixed
AppStream-9.4.0.Z.EUS:thunderbird-0:140.9.0-1.el9_4.aarch64
AppStream-9.4.0.Z.EUS:thunderbird-0:140.9.0-1.el9_4.ppc64le
AppStream-9.4.0.Z.EUS:thunderbird-0:140.9.0-1.el9_4.s390x
AppStream-9.4.0.Z.EUS:thunderbird-0:140.9.0-1.el9_4.src
AppStream-9.4.0.Z.EUS:thunderbird-0:140.9.0-1.el9_4.x86_64
AppStream-9.4.0.Z.EUS:thunderbird-debuginfo-0:140.9.0-1.el9_4.aarch64
AppStream-9.4.0.Z.EUS:thunderbird-debuginfo-0:140.9.0-1.el9_4.ppc64le
AppStream-9.4.0.Z.EUS:thunderbird-debuginfo-0:140.9.0-1.el9_4.s390x
AppStream-9.4.0.Z.EUS:thunderbird-debuginfo-0:140.9.0-1.el9_4.x86_64
AppStream-9.4.0.Z.EUS:thunderbird-debugsource-0:140.9.0-1.el9_4.aarch64
AppStream-9.4.0.Z.EUS:thunderbird-debugsource-0:140.9.0-1.el9_4.ppc64le
AppStream-9.4.0.Z.EUS:thunderbird-debugsource-0:140.9.0-1.el9_4.s390x
AppStream-9.4.0.Z.EUS:thunderbird-debugsource-0:140.9.0-1.el9_4.x86_64
Threats
Impact
Moderate
A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: Incorrect boundary conditions in the Audio/Video: GMP component
6.1 (Medium)
Vendor Fix
For details on how to apply this update, which includes the changes described in this advisory, refer to:
https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2026:8290
Product status
Fixed
AppStream-9.4.0.Z.EUS:thunderbird-0:140.9.0-1.el9_4.aarch64
AppStream-9.4.0.Z.EUS:thunderbird-0:140.9.0-1.el9_4.ppc64le
AppStream-9.4.0.Z.EUS:thunderbird-0:140.9.0-1.el9_4.s390x
AppStream-9.4.0.Z.EUS:thunderbird-0:140.9.0-1.el9_4.src
AppStream-9.4.0.Z.EUS:thunderbird-0:140.9.0-1.el9_4.x86_64
AppStream-9.4.0.Z.EUS:thunderbird-debuginfo-0:140.9.0-1.el9_4.aarch64
AppStream-9.4.0.Z.EUS:thunderbird-debuginfo-0:140.9.0-1.el9_4.ppc64le
AppStream-9.4.0.Z.EUS:thunderbird-debuginfo-0:140.9.0-1.el9_4.s390x
AppStream-9.4.0.Z.EUS:thunderbird-debuginfo-0:140.9.0-1.el9_4.x86_64
AppStream-9.4.0.Z.EUS:thunderbird-debugsource-0:140.9.0-1.el9_4.aarch64
AppStream-9.4.0.Z.EUS:thunderbird-debugsource-0:140.9.0-1.el9_4.ppc64le
AppStream-9.4.0.Z.EUS:thunderbird-debugsource-0:140.9.0-1.el9_4.s390x
AppStream-9.4.0.Z.EUS:thunderbird-debugsource-0:140.9.0-1.el9_4.x86_64
Threats
Impact
Moderate
A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: Incorrect boundary conditions in the Audio/Video component
6.1 (Medium)
Vendor Fix
For details on how to apply this update, which includes the changes described in this advisory, refer to:
https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2026:8290
Product status
Fixed
AppStream-9.4.0.Z.EUS:thunderbird-0:140.9.0-1.el9_4.aarch64
AppStream-9.4.0.Z.EUS:thunderbird-0:140.9.0-1.el9_4.ppc64le
AppStream-9.4.0.Z.EUS:thunderbird-0:140.9.0-1.el9_4.s390x
AppStream-9.4.0.Z.EUS:thunderbird-0:140.9.0-1.el9_4.src
AppStream-9.4.0.Z.EUS:thunderbird-0:140.9.0-1.el9_4.x86_64
AppStream-9.4.0.Z.EUS:thunderbird-debuginfo-0:140.9.0-1.el9_4.aarch64
AppStream-9.4.0.Z.EUS:thunderbird-debuginfo-0:140.9.0-1.el9_4.ppc64le
AppStream-9.4.0.Z.EUS:thunderbird-debuginfo-0:140.9.0-1.el9_4.s390x
AppStream-9.4.0.Z.EUS:thunderbird-debuginfo-0:140.9.0-1.el9_4.x86_64
AppStream-9.4.0.Z.EUS:thunderbird-debugsource-0:140.9.0-1.el9_4.aarch64
AppStream-9.4.0.Z.EUS:thunderbird-debugsource-0:140.9.0-1.el9_4.ppc64le
AppStream-9.4.0.Z.EUS:thunderbird-debugsource-0:140.9.0-1.el9_4.s390x
AppStream-9.4.0.Z.EUS:thunderbird-debugsource-0:140.9.0-1.el9_4.x86_64
Threats
Impact
Moderate
A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: Use-after-free in the Widget: Cocoa component
6.1 (Medium)
Vendor Fix
For details on how to apply this update, which includes the changes described in this advisory, refer to:
https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2026:8290
Product status
Fixed
AppStream-9.4.0.Z.EUS:thunderbird-0:140.9.0-1.el9_4.aarch64
AppStream-9.4.0.Z.EUS:thunderbird-0:140.9.0-1.el9_4.ppc64le
AppStream-9.4.0.Z.EUS:thunderbird-0:140.9.0-1.el9_4.s390x
AppStream-9.4.0.Z.EUS:thunderbird-0:140.9.0-1.el9_4.src
AppStream-9.4.0.Z.EUS:thunderbird-0:140.9.0-1.el9_4.x86_64
AppStream-9.4.0.Z.EUS:thunderbird-debuginfo-0:140.9.0-1.el9_4.aarch64
AppStream-9.4.0.Z.EUS:thunderbird-debuginfo-0:140.9.0-1.el9_4.ppc64le
AppStream-9.4.0.Z.EUS:thunderbird-debuginfo-0:140.9.0-1.el9_4.s390x
AppStream-9.4.0.Z.EUS:thunderbird-debuginfo-0:140.9.0-1.el9_4.x86_64
AppStream-9.4.0.Z.EUS:thunderbird-debugsource-0:140.9.0-1.el9_4.aarch64
AppStream-9.4.0.Z.EUS:thunderbird-debugsource-0:140.9.0-1.el9_4.ppc64le
AppStream-9.4.0.Z.EUS:thunderbird-debugsource-0:140.9.0-1.el9_4.s390x
AppStream-9.4.0.Z.EUS:thunderbird-debugsource-0:140.9.0-1.el9_4.x86_64
Threats
Impact
Moderate
A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: Information disclosure in the Widget: Cocoa component
6.5 (Medium)
Vendor Fix
For details on how to apply this update, which includes the changes described in this advisory, refer to:
https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2026:8290
Product status
Fixed
AppStream-9.4.0.Z.EUS:thunderbird-0:140.9.0-1.el9_4.aarch64
AppStream-9.4.0.Z.EUS:thunderbird-0:140.9.0-1.el9_4.ppc64le
AppStream-9.4.0.Z.EUS:thunderbird-0:140.9.0-1.el9_4.s390x
AppStream-9.4.0.Z.EUS:thunderbird-0:140.9.0-1.el9_4.src
AppStream-9.4.0.Z.EUS:thunderbird-0:140.9.0-1.el9_4.x86_64
AppStream-9.4.0.Z.EUS:thunderbird-debuginfo-0:140.9.0-1.el9_4.aarch64
AppStream-9.4.0.Z.EUS:thunderbird-debuginfo-0:140.9.0-1.el9_4.ppc64le
AppStream-9.4.0.Z.EUS:thunderbird-debuginfo-0:140.9.0-1.el9_4.s390x
AppStream-9.4.0.Z.EUS:thunderbird-debuginfo-0:140.9.0-1.el9_4.x86_64
AppStream-9.4.0.Z.EUS:thunderbird-debugsource-0:140.9.0-1.el9_4.aarch64
AppStream-9.4.0.Z.EUS:thunderbird-debugsource-0:140.9.0-1.el9_4.ppc64le
AppStream-9.4.0.Z.EUS:thunderbird-debugsource-0:140.9.0-1.el9_4.s390x
AppStream-9.4.0.Z.EUS:thunderbird-debugsource-0:140.9.0-1.el9_4.x86_64
Threats
Impact
Moderate
A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: Incorrect boundary conditions in the Graphics component
6.1 (Medium)
Vendor Fix
For details on how to apply this update, which includes the changes described in this advisory, refer to:
https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2026:8290
Product status
Fixed
AppStream-9.4.0.Z.EUS:thunderbird-0:140.9.0-1.el9_4.aarch64
AppStream-9.4.0.Z.EUS:thunderbird-0:140.9.0-1.el9_4.ppc64le
AppStream-9.4.0.Z.EUS:thunderbird-0:140.9.0-1.el9_4.s390x
AppStream-9.4.0.Z.EUS:thunderbird-0:140.9.0-1.el9_4.src
AppStream-9.4.0.Z.EUS:thunderbird-0:140.9.0-1.el9_4.x86_64
AppStream-9.4.0.Z.EUS:thunderbird-debuginfo-0:140.9.0-1.el9_4.aarch64
AppStream-9.4.0.Z.EUS:thunderbird-debuginfo-0:140.9.0-1.el9_4.ppc64le
AppStream-9.4.0.Z.EUS:thunderbird-debuginfo-0:140.9.0-1.el9_4.s390x
AppStream-9.4.0.Z.EUS:thunderbird-debuginfo-0:140.9.0-1.el9_4.x86_64
AppStream-9.4.0.Z.EUS:thunderbird-debugsource-0:140.9.0-1.el9_4.aarch64
AppStream-9.4.0.Z.EUS:thunderbird-debugsource-0:140.9.0-1.el9_4.ppc64le
AppStream-9.4.0.Z.EUS:thunderbird-debugsource-0:140.9.0-1.el9_4.s390x
AppStream-9.4.0.Z.EUS:thunderbird-debugsource-0:140.9.0-1.el9_4.x86_64
Threats
Impact
Moderate
A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: Incorrect boundary conditions in the Audio/Video component
6.5 (Medium)
Vendor Fix
For details on how to apply this update, which includes the changes described in this advisory, refer to:
https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2026:8290
Product status
Fixed
AppStream-9.4.0.Z.EUS:thunderbird-0:140.9.0-1.el9_4.aarch64
AppStream-9.4.0.Z.EUS:thunderbird-0:140.9.0-1.el9_4.ppc64le
AppStream-9.4.0.Z.EUS:thunderbird-0:140.9.0-1.el9_4.s390x
AppStream-9.4.0.Z.EUS:thunderbird-0:140.9.0-1.el9_4.src
AppStream-9.4.0.Z.EUS:thunderbird-0:140.9.0-1.el9_4.x86_64
AppStream-9.4.0.Z.EUS:thunderbird-debuginfo-0:140.9.0-1.el9_4.aarch64
AppStream-9.4.0.Z.EUS:thunderbird-debuginfo-0:140.9.0-1.el9_4.ppc64le
AppStream-9.4.0.Z.EUS:thunderbird-debuginfo-0:140.9.0-1.el9_4.s390x
AppStream-9.4.0.Z.EUS:thunderbird-debuginfo-0:140.9.0-1.el9_4.x86_64
AppStream-9.4.0.Z.EUS:thunderbird-debugsource-0:140.9.0-1.el9_4.aarch64
AppStream-9.4.0.Z.EUS:thunderbird-debugsource-0:140.9.0-1.el9_4.ppc64le
AppStream-9.4.0.Z.EUS:thunderbird-debugsource-0:140.9.0-1.el9_4.s390x
AppStream-9.4.0.Z.EUS:thunderbird-debugsource-0:140.9.0-1.el9_4.x86_64
Threats
Impact
Moderate
A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: Uninitialized memory in the Graphics: Canvas2D component
6.5 (Medium)
Vendor Fix
For details on how to apply this update, which includes the changes described in this advisory, refer to:
https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2026:8290
Product status
Fixed
AppStream-9.4.0.Z.EUS:thunderbird-0:140.9.0-1.el9_4.aarch64
AppStream-9.4.0.Z.EUS:thunderbird-0:140.9.0-1.el9_4.ppc64le
AppStream-9.4.0.Z.EUS:thunderbird-0:140.9.0-1.el9_4.s390x
AppStream-9.4.0.Z.EUS:thunderbird-0:140.9.0-1.el9_4.src
AppStream-9.4.0.Z.EUS:thunderbird-0:140.9.0-1.el9_4.x86_64
AppStream-9.4.0.Z.EUS:thunderbird-debuginfo-0:140.9.0-1.el9_4.aarch64
AppStream-9.4.0.Z.EUS:thunderbird-debuginfo-0:140.9.0-1.el9_4.ppc64le
AppStream-9.4.0.Z.EUS:thunderbird-debuginfo-0:140.9.0-1.el9_4.s390x
AppStream-9.4.0.Z.EUS:thunderbird-debuginfo-0:140.9.0-1.el9_4.x86_64
AppStream-9.4.0.Z.EUS:thunderbird-debugsource-0:140.9.0-1.el9_4.aarch64
AppStream-9.4.0.Z.EUS:thunderbird-debugsource-0:140.9.0-1.el9_4.ppc64le
AppStream-9.4.0.Z.EUS:thunderbird-debugsource-0:140.9.0-1.el9_4.s390x
AppStream-9.4.0.Z.EUS:thunderbird-debugsource-0:140.9.0-1.el9_4.x86_64
Threats
Impact
Moderate
A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: Incorrect boundary conditions, uninitialized memory in the JavaScript Engine component
6.1 (Medium)
Vendor Fix
For details on how to apply this update, which includes the changes described in this advisory, refer to:
https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2026:8290
Product status
Fixed
AppStream-9.4.0.Z.EUS:thunderbird-0:140.9.0-1.el9_4.aarch64
AppStream-9.4.0.Z.EUS:thunderbird-0:140.9.0-1.el9_4.ppc64le
AppStream-9.4.0.Z.EUS:thunderbird-0:140.9.0-1.el9_4.s390x
AppStream-9.4.0.Z.EUS:thunderbird-0:140.9.0-1.el9_4.src
AppStream-9.4.0.Z.EUS:thunderbird-0:140.9.0-1.el9_4.x86_64
AppStream-9.4.0.Z.EUS:thunderbird-debuginfo-0:140.9.0-1.el9_4.aarch64
AppStream-9.4.0.Z.EUS:thunderbird-debuginfo-0:140.9.0-1.el9_4.ppc64le
AppStream-9.4.0.Z.EUS:thunderbird-debuginfo-0:140.9.0-1.el9_4.s390x
AppStream-9.4.0.Z.EUS:thunderbird-debuginfo-0:140.9.0-1.el9_4.x86_64
AppStream-9.4.0.Z.EUS:thunderbird-debugsource-0:140.9.0-1.el9_4.aarch64
AppStream-9.4.0.Z.EUS:thunderbird-debugsource-0:140.9.0-1.el9_4.ppc64le
AppStream-9.4.0.Z.EUS:thunderbird-debugsource-0:140.9.0-1.el9_4.s390x
AppStream-9.4.0.Z.EUS:thunderbird-debugsource-0:140.9.0-1.el9_4.x86_64
Threats
Impact
Moderate
A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: Privilege escalation in the Netmonitor component
6.1 (Medium)
Vendor Fix
For details on how to apply this update, which includes the changes described in this advisory, refer to:
https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2026:8290
Product status
Fixed
AppStream-9.4.0.Z.EUS:thunderbird-0:140.9.0-1.el9_4.aarch64
AppStream-9.4.0.Z.EUS:thunderbird-0:140.9.0-1.el9_4.ppc64le
AppStream-9.4.0.Z.EUS:thunderbird-0:140.9.0-1.el9_4.s390x
AppStream-9.4.0.Z.EUS:thunderbird-0:140.9.0-1.el9_4.src
AppStream-9.4.0.Z.EUS:thunderbird-0:140.9.0-1.el9_4.x86_64
AppStream-9.4.0.Z.EUS:thunderbird-debuginfo-0:140.9.0-1.el9_4.aarch64
AppStream-9.4.0.Z.EUS:thunderbird-debuginfo-0:140.9.0-1.el9_4.ppc64le
AppStream-9.4.0.Z.EUS:thunderbird-debuginfo-0:140.9.0-1.el9_4.s390x
AppStream-9.4.0.Z.EUS:thunderbird-debuginfo-0:140.9.0-1.el9_4.x86_64
AppStream-9.4.0.Z.EUS:thunderbird-debugsource-0:140.9.0-1.el9_4.aarch64
AppStream-9.4.0.Z.EUS:thunderbird-debugsource-0:140.9.0-1.el9_4.ppc64le
AppStream-9.4.0.Z.EUS:thunderbird-debugsource-0:140.9.0-1.el9_4.s390x
AppStream-9.4.0.Z.EUS:thunderbird-debugsource-0:140.9.0-1.el9_4.x86_64
Threats
Impact
Moderate
A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: Undefined behavior in the WebRTC: Signaling component
CWE-475 - Undefined Behavior for Input to API
Vendor Fix
For details on how to apply this update, which includes the changes described in this advisory, refer to:
https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2026:8290
Product status
Fixed
AppStream-9.4.0.Z.EUS:thunderbird-0:140.9.0-1.el9_4.aarch64
AppStream-9.4.0.Z.EUS:thunderbird-0:140.9.0-1.el9_4.ppc64le
AppStream-9.4.0.Z.EUS:thunderbird-0:140.9.0-1.el9_4.s390x
AppStream-9.4.0.Z.EUS:thunderbird-0:140.9.0-1.el9_4.src
AppStream-9.4.0.Z.EUS:thunderbird-0:140.9.0-1.el9_4.x86_64
AppStream-9.4.0.Z.EUS:thunderbird-debuginfo-0:140.9.0-1.el9_4.aarch64
AppStream-9.4.0.Z.EUS:thunderbird-debuginfo-0:140.9.0-1.el9_4.ppc64le
AppStream-9.4.0.Z.EUS:thunderbird-debuginfo-0:140.9.0-1.el9_4.s390x
AppStream-9.4.0.Z.EUS:thunderbird-debuginfo-0:140.9.0-1.el9_4.x86_64
AppStream-9.4.0.Z.EUS:thunderbird-debugsource-0:140.9.0-1.el9_4.aarch64
AppStream-9.4.0.Z.EUS:thunderbird-debugsource-0:140.9.0-1.el9_4.ppc64le
AppStream-9.4.0.Z.EUS:thunderbird-debugsource-0:140.9.0-1.el9_4.s390x
AppStream-9.4.0.Z.EUS:thunderbird-debugsource-0:140.9.0-1.el9_4.x86_64
Threats
Impact
Low
A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: Incorrect boundary conditions in the Graphics: Text component
CWE-805 - Buffer Access with Incorrect Length Value
Vendor Fix
For details on how to apply this update, which includes the changes described in this advisory, refer to:
https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2026:8290
Product status
Fixed
AppStream-9.4.0.Z.EUS:thunderbird-0:140.9.0-1.el9_4.aarch64
AppStream-9.4.0.Z.EUS:thunderbird-0:140.9.0-1.el9_4.ppc64le
AppStream-9.4.0.Z.EUS:thunderbird-0:140.9.0-1.el9_4.s390x
AppStream-9.4.0.Z.EUS:thunderbird-0:140.9.0-1.el9_4.src
AppStream-9.4.0.Z.EUS:thunderbird-0:140.9.0-1.el9_4.x86_64
AppStream-9.4.0.Z.EUS:thunderbird-debuginfo-0:140.9.0-1.el9_4.aarch64
AppStream-9.4.0.Z.EUS:thunderbird-debuginfo-0:140.9.0-1.el9_4.ppc64le
AppStream-9.4.0.Z.EUS:thunderbird-debuginfo-0:140.9.0-1.el9_4.s390x
AppStream-9.4.0.Z.EUS:thunderbird-debuginfo-0:140.9.0-1.el9_4.x86_64
AppStream-9.4.0.Z.EUS:thunderbird-debugsource-0:140.9.0-1.el9_4.aarch64
AppStream-9.4.0.Z.EUS:thunderbird-debugsource-0:140.9.0-1.el9_4.ppc64le
AppStream-9.4.0.Z.EUS:thunderbird-debugsource-0:140.9.0-1.el9_4.s390x
AppStream-9.4.0.Z.EUS:thunderbird-debugsource-0:140.9.0-1.el9_4.x86_64
Threats
Impact
Low
A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: Memory safety bugs present in Firefox ESR 140.8, Thunderbird ESR 140.8, Firefox 148 and Thunderbird 148. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code.
7.5 (High)
Vendor Fix
For details on how to apply this update, which includes the changes described in this advisory, refer to:
https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2026:8290
Product status
Fixed
AppStream-9.4.0.Z.EUS:thunderbird-0:140.9.0-1.el9_4.aarch64
AppStream-9.4.0.Z.EUS:thunderbird-0:140.9.0-1.el9_4.ppc64le
AppStream-9.4.0.Z.EUS:thunderbird-0:140.9.0-1.el9_4.s390x
AppStream-9.4.0.Z.EUS:thunderbird-0:140.9.0-1.el9_4.src
AppStream-9.4.0.Z.EUS:thunderbird-0:140.9.0-1.el9_4.x86_64
AppStream-9.4.0.Z.EUS:thunderbird-debuginfo-0:140.9.0-1.el9_4.aarch64
AppStream-9.4.0.Z.EUS:thunderbird-debuginfo-0:140.9.0-1.el9_4.ppc64le
AppStream-9.4.0.Z.EUS:thunderbird-debuginfo-0:140.9.0-1.el9_4.s390x
AppStream-9.4.0.Z.EUS:thunderbird-debuginfo-0:140.9.0-1.el9_4.x86_64
AppStream-9.4.0.Z.EUS:thunderbird-debugsource-0:140.9.0-1.el9_4.aarch64
AppStream-9.4.0.Z.EUS:thunderbird-debugsource-0:140.9.0-1.el9_4.ppc64le
AppStream-9.4.0.Z.EUS:thunderbird-debugsource-0:140.9.0-1.el9_4.s390x
AppStream-9.4.0.Z.EUS:thunderbird-debugsource-0:140.9.0-1.el9_4.x86_64
Threats
Impact
Important
A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: Memory safety bugs present in Firefox ESR 115.33, Firefox ESR 140.8, Thunderbird ESR 140.8, Firefox 148 and Thunderbird 148. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code.
7.5 (High)
Vendor Fix
For details on how to apply this update, which includes the changes described in this advisory, refer to:
https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2026:8290
Product status
Fixed
AppStream-9.4.0.Z.EUS:thunderbird-0:140.9.0-1.el9_4.aarch64
AppStream-9.4.0.Z.EUS:thunderbird-0:140.9.0-1.el9_4.ppc64le
AppStream-9.4.0.Z.EUS:thunderbird-0:140.9.0-1.el9_4.s390x
AppStream-9.4.0.Z.EUS:thunderbird-0:140.9.0-1.el9_4.src
AppStream-9.4.0.Z.EUS:thunderbird-0:140.9.0-1.el9_4.x86_64
AppStream-9.4.0.Z.EUS:thunderbird-debuginfo-0:140.9.0-1.el9_4.aarch64
AppStream-9.4.0.Z.EUS:thunderbird-debuginfo-0:140.9.0-1.el9_4.ppc64le
AppStream-9.4.0.Z.EUS:thunderbird-debuginfo-0:140.9.0-1.el9_4.s390x
AppStream-9.4.0.Z.EUS:thunderbird-debuginfo-0:140.9.0-1.el9_4.x86_64
AppStream-9.4.0.Z.EUS:thunderbird-debugsource-0:140.9.0-1.el9_4.aarch64
AppStream-9.4.0.Z.EUS:thunderbird-debugsource-0:140.9.0-1.el9_4.ppc64le
AppStream-9.4.0.Z.EUS:thunderbird-debugsource-0:140.9.0-1.el9_4.s390x
AppStream-9.4.0.Z.EUS:thunderbird-debugsource-0:140.9.0-1.el9_4.x86_64
Threats
Impact
Important
References
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"text": "An update for thunderbird is now available for Red Hat Enterprise Linux 9.4 Extended Update Support.\n\nRed Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.",
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"text": "Mozilla Thunderbird is a standalone mail and newsgroup client.\n\nSecurity Fix(es):\n\n* firefox: thunderbird: Use-after-free in the JavaScript Engine component (CVE-2026-4701)\n\n* firefox: thunderbird: Memory safety bugs fixed in Firefox ESR 115.34, Firefox ESR 140.9, Thunderbird ESR 140.9, Firefox 149 and Thunderbird 149 (CVE-2026-4721)\n\n* firefox: thunderbird: Privilege escalation in the Netmonitor component (CVE-2026-4717)\n\n* firefox: thunderbird: Sandbox escape due to use-after-free in the Disability Access APIs component (CVE-2026-4688)\n\n* firefox: thunderbird: Incorrect boundary conditions in the Graphics: Canvas2D component (CVE-2026-4706)\n\n* firefox: thunderbird: Incorrect boundary conditions in the Audio/Video: Web Codecs component (CVE-2026-4695)\n\n* firefox: thunderbird: Sandbox escape due to incorrect boundary conditions, integer overflow in the XPCOM component (CVE-2026-4689)\n\n* firefox: thunderbird: JIT miscompilation in the JavaScript Engine: JIT component (CVE-2026-4698)\n\n* firefox: thunderbird: Incorrect boundary conditions, uninitialized memory in the JavaScript Engine component (CVE-2026-4716)\n\n* firefox: thunderbird: Race condition, use-after-free in the Graphics: WebRender component (CVE-2026-4684)\n\n* firefox: thunderbird: Undefined behavior in the WebRTC: Signaling component (CVE-2026-4705)\n\n* firefox: thunderbird: Uninitialized memory in the Graphics: Canvas2D component (CVE-2026-4715)\n\n* firefox: thunderbird: Incorrect boundary conditions in the Graphics: Canvas2D component (CVE-2026-4685)\n\n* firefox: thunderbird: Incorrect boundary conditions in the Audio/Video component (CVE-2026-4714)\n\n* firefox: thunderbird: Incorrect boundary conditions in the Audio/Video: GMP component (CVE-2026-4709)\n\n* firefox: thunderbird: Incorrect boundary conditions in the Audio/Video component (CVE-2026-4710)\n\n* firefox: thunderbird: Information disclosure in the Widget: Cocoa component (CVE-2026-4712)\n\n* firefox: thunderbird: Incorrect boundary conditions in the Audio/Video: Web Codecs component (CVE-2026-4697)\n\n* firefox: thunderbird: Incorrect boundary conditions in the Graphics component (CVE-2026-4713)\n\n* firefox: thunderbird: Sandbox escape due to incorrect boundary conditions, integer overflow in the XPCOM component (CVE-2026-4690)\n\n* firefox: thunderbird: Use-after-free in the Widget: Cocoa component (CVE-2026-4711)\n\n* firefox: thunderbird: Incorrect boundary conditions in the Graphics: Canvas2D component (CVE-2026-4686)\n\n* firefox: thunderbird: Incorrect boundary conditions in the Graphics component (CVE-2026-4708)\n\n* firefox: thunderbird: Use-after-free in the CSS Parsing and Computation component (CVE-2026-4691)\n\n* firefox: thunderbird: Incorrect boundary conditions in the Layout: Text and Fonts component (CVE-2026-4699)\n\n* firefox: thunderbird: Use-after-free in the Layout: Text and Fonts component (CVE-2026-4696)\n\n* firefox: thunderbird: Incorrect boundary conditions in the Audio/Video: Playback component (CVE-2026-4693)\n\n* firefox: thunderbird: Undefined behavior in the WebRTC: Signaling component (CVE-2026-4718)\n\n* firefox: thunderbird: JIT miscompilation in the JavaScript Engine component (CVE-2026-4702)\n\n* firefox: thunderbird: Incorrect boundary conditions in the Graphics: Text component (CVE-2026-4719)\n\n* firefox: thunderbird: Incorrect boundary conditions, integer overflow in the Graphics component (CVE-2026-4694)\n\n* firefox: thunderbird: Sandbox escape in the Responsive Design Mode component (CVE-2026-4692)\n\n* firefox: thunderbird: Memory safety bugs fixed in Firefox ESR 140.9, Thunderbird ESR 140.9, Firefox 149 and Thunderbird 149 (CVE-2026-4720)\n\n* firefox: thunderbird: Mitigation bypass in the Networking: HTTP component (CVE-2026-4700)\n\n* firefox: thunderbird: Incorrect boundary conditions in the Graphics: Canvas2D component (CVE-2026-4707)\n\n* firefox: thunderbird: Denial-of-service in the WebRTC: Signaling component (CVE-2026-4704)\n\n* firefox: thunderbird: Sandbox escape due to incorrect boundary conditions in the Telemetry component (CVE-2026-4687)\n\n* thunderbird: Out of bounds read in IMAP parsing (CVE-2026-4371)\n\n* thunderbird: Spoofing issue in Thunderbird (CVE-2026-3889)\n\nFor more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.",
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"cwe": {
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RHSA-2026:7843
Vulnerability from csaf_redhat - Published: 2026-04-13 10:24 - Updated: 2026-04-28 18:40Summary
Red Hat Security Advisory: firefox security update
Severity
Important
Notes
Topic: An update for firefox is now available for Red Hat Enterprise Linux 10.0 Extended Update Support.
Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.
Details: Mozilla Firefox is an open-source web browser, designed for standards compliance, performance, and portability.
Security Fix(es):
* firefox: thunderbird: Use-after-free in the JavaScript Engine component (CVE-2026-4701)
* firefox: thunderbird: Memory safety bugs fixed in Firefox ESR 115.34, Firefox ESR 140.9, Thunderbird ESR 140.9, Firefox 149 and Thunderbird 149 (CVE-2026-4721)
* firefox: thunderbird: Privilege escalation in the Netmonitor component (CVE-2026-4717)
* firefox: thunderbird: Sandbox escape due to use-after-free in the Disability Access APIs component (CVE-2026-4688)
* firefox: thunderbird: Incorrect boundary conditions in the Graphics: Canvas2D component (CVE-2026-4706)
* firefox: thunderbird: Incorrect boundary conditions in the Audio/Video: Web Codecs component (CVE-2026-4695)
* firefox: thunderbird: Sandbox escape due to incorrect boundary conditions, integer overflow in the XPCOM component (CVE-2026-4689)
* firefox: thunderbird: JIT miscompilation in the JavaScript Engine: JIT component (CVE-2026-4698)
* firefox: thunderbird: Incorrect boundary conditions, uninitialized memory in the JavaScript Engine component (CVE-2026-4716)
* firefox: thunderbird: Race condition, use-after-free in the Graphics: WebRender component (CVE-2026-4684)
* firefox: thunderbird: Undefined behavior in the WebRTC: Signaling component (CVE-2026-4705)
* firefox: thunderbird: Uninitialized memory in the Graphics: Canvas2D component (CVE-2026-4715)
* firefox: thunderbird: Incorrect boundary conditions in the Graphics: Canvas2D component (CVE-2026-4685)
* firefox: thunderbird: Incorrect boundary conditions in the Audio/Video component (CVE-2026-4714)
* firefox: thunderbird: Incorrect boundary conditions in the Audio/Video: GMP component (CVE-2026-4709)
* firefox: thunderbird: Incorrect boundary conditions in the Audio/Video component (CVE-2026-4710)
* firefox: thunderbird: Information disclosure in the Widget: Cocoa component (CVE-2026-4712)
* firefox: thunderbird: Incorrect boundary conditions in the Audio/Video: Web Codecs component (CVE-2026-4697)
* firefox: thunderbird: Incorrect boundary conditions in the Graphics component (CVE-2026-4713)
* firefox: thunderbird: Sandbox escape due to incorrect boundary conditions, integer overflow in the XPCOM component (CVE-2026-4690)
* firefox: thunderbird: Use-after-free in the Widget: Cocoa component (CVE-2026-4711)
* firefox: thunderbird: Incorrect boundary conditions in the Graphics: Canvas2D component (CVE-2026-4686)
* firefox: thunderbird: Incorrect boundary conditions in the Graphics component (CVE-2026-4708)
* firefox: thunderbird: Use-after-free in the CSS Parsing and Computation component (CVE-2026-4691)
* firefox: thunderbird: Incorrect boundary conditions in the Layout: Text and Fonts component (CVE-2026-4699)
* firefox: thunderbird: Use-after-free in the Layout: Text and Fonts component (CVE-2026-4696)
* firefox: thunderbird: Incorrect boundary conditions in the Audio/Video: Playback component (CVE-2026-4693)
* firefox: thunderbird: Undefined behavior in the WebRTC: Signaling component (CVE-2026-4718)
* firefox: thunderbird: JIT miscompilation in the JavaScript Engine component (CVE-2026-4702)
* firefox: thunderbird: Incorrect boundary conditions in the Graphics: Text component (CVE-2026-4719)
* firefox: thunderbird: Incorrect boundary conditions, integer overflow in the Graphics component (CVE-2026-4694)
* firefox: thunderbird: Sandbox escape in the Responsive Design Mode component (CVE-2026-4692)
* firefox: thunderbird: Memory safety bugs fixed in Firefox ESR 140.9, Thunderbird ESR 140.9, Firefox 149 and Thunderbird 149 (CVE-2026-4720)
* firefox: thunderbird: Mitigation bypass in the Networking: HTTP component (CVE-2026-4700)
* firefox: thunderbird: Incorrect boundary conditions in the Graphics: Canvas2D component (CVE-2026-4707)
* firefox: thunderbird: Denial-of-service in the WebRTC: Signaling component (CVE-2026-4704)
* firefox: thunderbird: Sandbox escape due to incorrect boundary conditions in the Telemetry component (CVE-2026-4687)
For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.
Terms of Use: This content is licensed under the Creative Commons Attribution 4.0 International License (https://creativecommons.org/licenses/by/4.0/). If you distribute this content, or a modified version of it, you must provide attribution to Red Hat Inc. and provide a link to the original.
A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: Race condition, use-after-free in the Graphics: WebRender component
7.5 (High)
Vendor Fix
For details on how to apply this update, which includes the changes described in this advisory, refer to:
https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2026:7843
Product status
Fixed
AppStream-10.0.Z.E2S:firefox-0:140.9.0-1.el10_0.aarch64
AppStream-10.0.Z.E2S:firefox-0:140.9.0-1.el10_0.ppc64le
AppStream-10.0.Z.E2S:firefox-0:140.9.0-1.el10_0.s390x
AppStream-10.0.Z.E2S:firefox-0:140.9.0-1.el10_0.src
AppStream-10.0.Z.E2S:firefox-0:140.9.0-1.el10_0.x86_64
AppStream-10.0.Z.E2S:firefox-debuginfo-0:140.9.0-1.el10_0.aarch64
AppStream-10.0.Z.E2S:firefox-debuginfo-0:140.9.0-1.el10_0.ppc64le
AppStream-10.0.Z.E2S:firefox-debuginfo-0:140.9.0-1.el10_0.s390x
AppStream-10.0.Z.E2S:firefox-debuginfo-0:140.9.0-1.el10_0.x86_64
AppStream-10.0.Z.E2S:firefox-debugsource-0:140.9.0-1.el10_0.aarch64
AppStream-10.0.Z.E2S:firefox-debugsource-0:140.9.0-1.el10_0.ppc64le
AppStream-10.0.Z.E2S:firefox-debugsource-0:140.9.0-1.el10_0.s390x
AppStream-10.0.Z.E2S:firefox-debugsource-0:140.9.0-1.el10_0.x86_64
Threats
Impact
Important
A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: Incorrect boundary conditions in the Graphics: Canvas2D component
7.5 (High)
Vendor Fix
For details on how to apply this update, which includes the changes described in this advisory, refer to:
https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2026:7843
Product status
Fixed
AppStream-10.0.Z.E2S:firefox-0:140.9.0-1.el10_0.aarch64
AppStream-10.0.Z.E2S:firefox-0:140.9.0-1.el10_0.ppc64le
AppStream-10.0.Z.E2S:firefox-0:140.9.0-1.el10_0.s390x
AppStream-10.0.Z.E2S:firefox-0:140.9.0-1.el10_0.src
AppStream-10.0.Z.E2S:firefox-0:140.9.0-1.el10_0.x86_64
AppStream-10.0.Z.E2S:firefox-debuginfo-0:140.9.0-1.el10_0.aarch64
AppStream-10.0.Z.E2S:firefox-debuginfo-0:140.9.0-1.el10_0.ppc64le
AppStream-10.0.Z.E2S:firefox-debuginfo-0:140.9.0-1.el10_0.s390x
AppStream-10.0.Z.E2S:firefox-debuginfo-0:140.9.0-1.el10_0.x86_64
AppStream-10.0.Z.E2S:firefox-debugsource-0:140.9.0-1.el10_0.aarch64
AppStream-10.0.Z.E2S:firefox-debugsource-0:140.9.0-1.el10_0.ppc64le
AppStream-10.0.Z.E2S:firefox-debugsource-0:140.9.0-1.el10_0.s390x
AppStream-10.0.Z.E2S:firefox-debugsource-0:140.9.0-1.el10_0.x86_64
Threats
Impact
Important
A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: Incorrect boundary conditions in the Graphics: Canvas2D component
7.5 (High)
Vendor Fix
For details on how to apply this update, which includes the changes described in this advisory, refer to:
https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2026:7843
Product status
Fixed
AppStream-10.0.Z.E2S:firefox-0:140.9.0-1.el10_0.aarch64
AppStream-10.0.Z.E2S:firefox-0:140.9.0-1.el10_0.ppc64le
AppStream-10.0.Z.E2S:firefox-0:140.9.0-1.el10_0.s390x
AppStream-10.0.Z.E2S:firefox-0:140.9.0-1.el10_0.src
AppStream-10.0.Z.E2S:firefox-0:140.9.0-1.el10_0.x86_64
AppStream-10.0.Z.E2S:firefox-debuginfo-0:140.9.0-1.el10_0.aarch64
AppStream-10.0.Z.E2S:firefox-debuginfo-0:140.9.0-1.el10_0.ppc64le
AppStream-10.0.Z.E2S:firefox-debuginfo-0:140.9.0-1.el10_0.s390x
AppStream-10.0.Z.E2S:firefox-debuginfo-0:140.9.0-1.el10_0.x86_64
AppStream-10.0.Z.E2S:firefox-debugsource-0:140.9.0-1.el10_0.aarch64
AppStream-10.0.Z.E2S:firefox-debugsource-0:140.9.0-1.el10_0.ppc64le
AppStream-10.0.Z.E2S:firefox-debugsource-0:140.9.0-1.el10_0.s390x
AppStream-10.0.Z.E2S:firefox-debugsource-0:140.9.0-1.el10_0.x86_64
Threats
Impact
Important
A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: Sandbox escape due to incorrect boundary conditions in the Telemetry component
7.5 (High)
Vendor Fix
For details on how to apply this update, which includes the changes described in this advisory, refer to:
https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2026:7843
Product status
Fixed
AppStream-10.0.Z.E2S:firefox-0:140.9.0-1.el10_0.aarch64
AppStream-10.0.Z.E2S:firefox-0:140.9.0-1.el10_0.ppc64le
AppStream-10.0.Z.E2S:firefox-0:140.9.0-1.el10_0.s390x
AppStream-10.0.Z.E2S:firefox-0:140.9.0-1.el10_0.src
AppStream-10.0.Z.E2S:firefox-0:140.9.0-1.el10_0.x86_64
AppStream-10.0.Z.E2S:firefox-debuginfo-0:140.9.0-1.el10_0.aarch64
AppStream-10.0.Z.E2S:firefox-debuginfo-0:140.9.0-1.el10_0.ppc64le
AppStream-10.0.Z.E2S:firefox-debuginfo-0:140.9.0-1.el10_0.s390x
AppStream-10.0.Z.E2S:firefox-debuginfo-0:140.9.0-1.el10_0.x86_64
AppStream-10.0.Z.E2S:firefox-debugsource-0:140.9.0-1.el10_0.aarch64
AppStream-10.0.Z.E2S:firefox-debugsource-0:140.9.0-1.el10_0.ppc64le
AppStream-10.0.Z.E2S:firefox-debugsource-0:140.9.0-1.el10_0.s390x
AppStream-10.0.Z.E2S:firefox-debugsource-0:140.9.0-1.el10_0.x86_64
Threats
Impact
Important
A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: Sandbox escape due to use-after-free in the Disability Access APIs component
7.5 (High)
Vendor Fix
For details on how to apply this update, which includes the changes described in this advisory, refer to:
https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2026:7843
Product status
Fixed
AppStream-10.0.Z.E2S:firefox-0:140.9.0-1.el10_0.aarch64
AppStream-10.0.Z.E2S:firefox-0:140.9.0-1.el10_0.ppc64le
AppStream-10.0.Z.E2S:firefox-0:140.9.0-1.el10_0.s390x
AppStream-10.0.Z.E2S:firefox-0:140.9.0-1.el10_0.src
AppStream-10.0.Z.E2S:firefox-0:140.9.0-1.el10_0.x86_64
AppStream-10.0.Z.E2S:firefox-debuginfo-0:140.9.0-1.el10_0.aarch64
AppStream-10.0.Z.E2S:firefox-debuginfo-0:140.9.0-1.el10_0.ppc64le
AppStream-10.0.Z.E2S:firefox-debuginfo-0:140.9.0-1.el10_0.s390x
AppStream-10.0.Z.E2S:firefox-debuginfo-0:140.9.0-1.el10_0.x86_64
AppStream-10.0.Z.E2S:firefox-debugsource-0:140.9.0-1.el10_0.aarch64
AppStream-10.0.Z.E2S:firefox-debugsource-0:140.9.0-1.el10_0.ppc64le
AppStream-10.0.Z.E2S:firefox-debugsource-0:140.9.0-1.el10_0.s390x
AppStream-10.0.Z.E2S:firefox-debugsource-0:140.9.0-1.el10_0.x86_64
Threats
Impact
Important
A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: Sandbox escape due to incorrect boundary conditions, integer overflow in the XPCOM component
7.5 (High)
Vendor Fix
For details on how to apply this update, which includes the changes described in this advisory, refer to:
https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2026:7843
Product status
Fixed
AppStream-10.0.Z.E2S:firefox-0:140.9.0-1.el10_0.aarch64
AppStream-10.0.Z.E2S:firefox-0:140.9.0-1.el10_0.ppc64le
AppStream-10.0.Z.E2S:firefox-0:140.9.0-1.el10_0.s390x
AppStream-10.0.Z.E2S:firefox-0:140.9.0-1.el10_0.src
AppStream-10.0.Z.E2S:firefox-0:140.9.0-1.el10_0.x86_64
AppStream-10.0.Z.E2S:firefox-debuginfo-0:140.9.0-1.el10_0.aarch64
AppStream-10.0.Z.E2S:firefox-debuginfo-0:140.9.0-1.el10_0.ppc64le
AppStream-10.0.Z.E2S:firefox-debuginfo-0:140.9.0-1.el10_0.s390x
AppStream-10.0.Z.E2S:firefox-debuginfo-0:140.9.0-1.el10_0.x86_64
AppStream-10.0.Z.E2S:firefox-debugsource-0:140.9.0-1.el10_0.aarch64
AppStream-10.0.Z.E2S:firefox-debugsource-0:140.9.0-1.el10_0.ppc64le
AppStream-10.0.Z.E2S:firefox-debugsource-0:140.9.0-1.el10_0.s390x
AppStream-10.0.Z.E2S:firefox-debugsource-0:140.9.0-1.el10_0.x86_64
Threats
Impact
Important
A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: Sandbox escape due to incorrect boundary conditions, integer overflow in the XPCOM component
7.5 (High)
Vendor Fix
For details on how to apply this update, which includes the changes described in this advisory, refer to:
https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2026:7843
Product status
Fixed
AppStream-10.0.Z.E2S:firefox-0:140.9.0-1.el10_0.aarch64
AppStream-10.0.Z.E2S:firefox-0:140.9.0-1.el10_0.ppc64le
AppStream-10.0.Z.E2S:firefox-0:140.9.0-1.el10_0.s390x
AppStream-10.0.Z.E2S:firefox-0:140.9.0-1.el10_0.src
AppStream-10.0.Z.E2S:firefox-0:140.9.0-1.el10_0.x86_64
AppStream-10.0.Z.E2S:firefox-debuginfo-0:140.9.0-1.el10_0.aarch64
AppStream-10.0.Z.E2S:firefox-debuginfo-0:140.9.0-1.el10_0.ppc64le
AppStream-10.0.Z.E2S:firefox-debuginfo-0:140.9.0-1.el10_0.s390x
AppStream-10.0.Z.E2S:firefox-debuginfo-0:140.9.0-1.el10_0.x86_64
AppStream-10.0.Z.E2S:firefox-debugsource-0:140.9.0-1.el10_0.aarch64
AppStream-10.0.Z.E2S:firefox-debugsource-0:140.9.0-1.el10_0.ppc64le
AppStream-10.0.Z.E2S:firefox-debugsource-0:140.9.0-1.el10_0.s390x
AppStream-10.0.Z.E2S:firefox-debugsource-0:140.9.0-1.el10_0.x86_64
Threats
Impact
Important
A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: Use-after-free in the CSS Parsing and Computation component
7.5 (High)
Vendor Fix
For details on how to apply this update, which includes the changes described in this advisory, refer to:
https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2026:7843
Product status
Fixed
AppStream-10.0.Z.E2S:firefox-0:140.9.0-1.el10_0.aarch64
AppStream-10.0.Z.E2S:firefox-0:140.9.0-1.el10_0.ppc64le
AppStream-10.0.Z.E2S:firefox-0:140.9.0-1.el10_0.s390x
AppStream-10.0.Z.E2S:firefox-0:140.9.0-1.el10_0.src
AppStream-10.0.Z.E2S:firefox-0:140.9.0-1.el10_0.x86_64
AppStream-10.0.Z.E2S:firefox-debuginfo-0:140.9.0-1.el10_0.aarch64
AppStream-10.0.Z.E2S:firefox-debuginfo-0:140.9.0-1.el10_0.ppc64le
AppStream-10.0.Z.E2S:firefox-debuginfo-0:140.9.0-1.el10_0.s390x
AppStream-10.0.Z.E2S:firefox-debuginfo-0:140.9.0-1.el10_0.x86_64
AppStream-10.0.Z.E2S:firefox-debugsource-0:140.9.0-1.el10_0.aarch64
AppStream-10.0.Z.E2S:firefox-debugsource-0:140.9.0-1.el10_0.ppc64le
AppStream-10.0.Z.E2S:firefox-debugsource-0:140.9.0-1.el10_0.s390x
AppStream-10.0.Z.E2S:firefox-debugsource-0:140.9.0-1.el10_0.x86_64
Threats
Impact
Important
A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: Sandbox escape in the Responsive Design Mode component
7.5 (High)
Vendor Fix
For details on how to apply this update, which includes the changes described in this advisory, refer to:
https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2026:7843
Product status
Fixed
AppStream-10.0.Z.E2S:firefox-0:140.9.0-1.el10_0.aarch64
AppStream-10.0.Z.E2S:firefox-0:140.9.0-1.el10_0.ppc64le
AppStream-10.0.Z.E2S:firefox-0:140.9.0-1.el10_0.s390x
AppStream-10.0.Z.E2S:firefox-0:140.9.0-1.el10_0.src
AppStream-10.0.Z.E2S:firefox-0:140.9.0-1.el10_0.x86_64
AppStream-10.0.Z.E2S:firefox-debuginfo-0:140.9.0-1.el10_0.aarch64
AppStream-10.0.Z.E2S:firefox-debuginfo-0:140.9.0-1.el10_0.ppc64le
AppStream-10.0.Z.E2S:firefox-debuginfo-0:140.9.0-1.el10_0.s390x
AppStream-10.0.Z.E2S:firefox-debuginfo-0:140.9.0-1.el10_0.x86_64
AppStream-10.0.Z.E2S:firefox-debugsource-0:140.9.0-1.el10_0.aarch64
AppStream-10.0.Z.E2S:firefox-debugsource-0:140.9.0-1.el10_0.ppc64le
AppStream-10.0.Z.E2S:firefox-debugsource-0:140.9.0-1.el10_0.s390x
AppStream-10.0.Z.E2S:firefox-debugsource-0:140.9.0-1.el10_0.x86_64
Threats
Impact
Important
A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: Incorrect boundary conditions in the Audio/Video: Playback component
7.5 (High)
Vendor Fix
For details on how to apply this update, which includes the changes described in this advisory, refer to:
https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2026:7843
Product status
Fixed
AppStream-10.0.Z.E2S:firefox-0:140.9.0-1.el10_0.aarch64
AppStream-10.0.Z.E2S:firefox-0:140.9.0-1.el10_0.ppc64le
AppStream-10.0.Z.E2S:firefox-0:140.9.0-1.el10_0.s390x
AppStream-10.0.Z.E2S:firefox-0:140.9.0-1.el10_0.src
AppStream-10.0.Z.E2S:firefox-0:140.9.0-1.el10_0.x86_64
AppStream-10.0.Z.E2S:firefox-debuginfo-0:140.9.0-1.el10_0.aarch64
AppStream-10.0.Z.E2S:firefox-debuginfo-0:140.9.0-1.el10_0.ppc64le
AppStream-10.0.Z.E2S:firefox-debuginfo-0:140.9.0-1.el10_0.s390x
AppStream-10.0.Z.E2S:firefox-debuginfo-0:140.9.0-1.el10_0.x86_64
AppStream-10.0.Z.E2S:firefox-debugsource-0:140.9.0-1.el10_0.aarch64
AppStream-10.0.Z.E2S:firefox-debugsource-0:140.9.0-1.el10_0.ppc64le
AppStream-10.0.Z.E2S:firefox-debugsource-0:140.9.0-1.el10_0.s390x
AppStream-10.0.Z.E2S:firefox-debugsource-0:140.9.0-1.el10_0.x86_64
Threats
Impact
Important
A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: Incorrect boundary conditions, integer overflow in the Graphics component
7.5 (High)
Vendor Fix
For details on how to apply this update, which includes the changes described in this advisory, refer to:
https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2026:7843
Product status
Fixed
AppStream-10.0.Z.E2S:firefox-0:140.9.0-1.el10_0.aarch64
AppStream-10.0.Z.E2S:firefox-0:140.9.0-1.el10_0.ppc64le
AppStream-10.0.Z.E2S:firefox-0:140.9.0-1.el10_0.s390x
AppStream-10.0.Z.E2S:firefox-0:140.9.0-1.el10_0.src
AppStream-10.0.Z.E2S:firefox-0:140.9.0-1.el10_0.x86_64
AppStream-10.0.Z.E2S:firefox-debuginfo-0:140.9.0-1.el10_0.aarch64
AppStream-10.0.Z.E2S:firefox-debuginfo-0:140.9.0-1.el10_0.ppc64le
AppStream-10.0.Z.E2S:firefox-debuginfo-0:140.9.0-1.el10_0.s390x
AppStream-10.0.Z.E2S:firefox-debuginfo-0:140.9.0-1.el10_0.x86_64
AppStream-10.0.Z.E2S:firefox-debugsource-0:140.9.0-1.el10_0.aarch64
AppStream-10.0.Z.E2S:firefox-debugsource-0:140.9.0-1.el10_0.ppc64le
AppStream-10.0.Z.E2S:firefox-debugsource-0:140.9.0-1.el10_0.s390x
AppStream-10.0.Z.E2S:firefox-debugsource-0:140.9.0-1.el10_0.x86_64
Threats
Impact
Important
A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: Incorrect boundary conditions in the Audio/Video: Web Codecs component
7.5 (High)
Vendor Fix
For details on how to apply this update, which includes the changes described in this advisory, refer to:
https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2026:7843
Product status
Fixed
AppStream-10.0.Z.E2S:firefox-0:140.9.0-1.el10_0.aarch64
AppStream-10.0.Z.E2S:firefox-0:140.9.0-1.el10_0.ppc64le
AppStream-10.0.Z.E2S:firefox-0:140.9.0-1.el10_0.s390x
AppStream-10.0.Z.E2S:firefox-0:140.9.0-1.el10_0.src
AppStream-10.0.Z.E2S:firefox-0:140.9.0-1.el10_0.x86_64
AppStream-10.0.Z.E2S:firefox-debuginfo-0:140.9.0-1.el10_0.aarch64
AppStream-10.0.Z.E2S:firefox-debuginfo-0:140.9.0-1.el10_0.ppc64le
AppStream-10.0.Z.E2S:firefox-debuginfo-0:140.9.0-1.el10_0.s390x
AppStream-10.0.Z.E2S:firefox-debuginfo-0:140.9.0-1.el10_0.x86_64
AppStream-10.0.Z.E2S:firefox-debugsource-0:140.9.0-1.el10_0.aarch64
AppStream-10.0.Z.E2S:firefox-debugsource-0:140.9.0-1.el10_0.ppc64le
AppStream-10.0.Z.E2S:firefox-debugsource-0:140.9.0-1.el10_0.s390x
AppStream-10.0.Z.E2S:firefox-debugsource-0:140.9.0-1.el10_0.x86_64
Threats
Impact
Important
A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: Use-after-free in the Layout: Text and Fonts component
7.5 (High)
Vendor Fix
For details on how to apply this update, which includes the changes described in this advisory, refer to:
https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2026:7843
Product status
Fixed
AppStream-10.0.Z.E2S:firefox-0:140.9.0-1.el10_0.aarch64
AppStream-10.0.Z.E2S:firefox-0:140.9.0-1.el10_0.ppc64le
AppStream-10.0.Z.E2S:firefox-0:140.9.0-1.el10_0.s390x
AppStream-10.0.Z.E2S:firefox-0:140.9.0-1.el10_0.src
AppStream-10.0.Z.E2S:firefox-0:140.9.0-1.el10_0.x86_64
AppStream-10.0.Z.E2S:firefox-debuginfo-0:140.9.0-1.el10_0.aarch64
AppStream-10.0.Z.E2S:firefox-debuginfo-0:140.9.0-1.el10_0.ppc64le
AppStream-10.0.Z.E2S:firefox-debuginfo-0:140.9.0-1.el10_0.s390x
AppStream-10.0.Z.E2S:firefox-debuginfo-0:140.9.0-1.el10_0.x86_64
AppStream-10.0.Z.E2S:firefox-debugsource-0:140.9.0-1.el10_0.aarch64
AppStream-10.0.Z.E2S:firefox-debugsource-0:140.9.0-1.el10_0.ppc64le
AppStream-10.0.Z.E2S:firefox-debugsource-0:140.9.0-1.el10_0.s390x
AppStream-10.0.Z.E2S:firefox-debugsource-0:140.9.0-1.el10_0.x86_64
Threats
Impact
Important
A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: Incorrect boundary conditions in the Audio/Video: Web Codecs component
7.5 (High)
Vendor Fix
For details on how to apply this update, which includes the changes described in this advisory, refer to:
https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2026:7843
Product status
Fixed
AppStream-10.0.Z.E2S:firefox-0:140.9.0-1.el10_0.aarch64
AppStream-10.0.Z.E2S:firefox-0:140.9.0-1.el10_0.ppc64le
AppStream-10.0.Z.E2S:firefox-0:140.9.0-1.el10_0.s390x
AppStream-10.0.Z.E2S:firefox-0:140.9.0-1.el10_0.src
AppStream-10.0.Z.E2S:firefox-0:140.9.0-1.el10_0.x86_64
AppStream-10.0.Z.E2S:firefox-debuginfo-0:140.9.0-1.el10_0.aarch64
AppStream-10.0.Z.E2S:firefox-debuginfo-0:140.9.0-1.el10_0.ppc64le
AppStream-10.0.Z.E2S:firefox-debuginfo-0:140.9.0-1.el10_0.s390x
AppStream-10.0.Z.E2S:firefox-debuginfo-0:140.9.0-1.el10_0.x86_64
AppStream-10.0.Z.E2S:firefox-debugsource-0:140.9.0-1.el10_0.aarch64
AppStream-10.0.Z.E2S:firefox-debugsource-0:140.9.0-1.el10_0.ppc64le
AppStream-10.0.Z.E2S:firefox-debugsource-0:140.9.0-1.el10_0.s390x
AppStream-10.0.Z.E2S:firefox-debugsource-0:140.9.0-1.el10_0.x86_64
Threats
Impact
Important
A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: JIT miscompilation in the JavaScript Engine: JIT component
7.5 (High)
Vendor Fix
For details on how to apply this update, which includes the changes described in this advisory, refer to:
https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2026:7843
Product status
Fixed
AppStream-10.0.Z.E2S:firefox-0:140.9.0-1.el10_0.aarch64
AppStream-10.0.Z.E2S:firefox-0:140.9.0-1.el10_0.ppc64le
AppStream-10.0.Z.E2S:firefox-0:140.9.0-1.el10_0.s390x
AppStream-10.0.Z.E2S:firefox-0:140.9.0-1.el10_0.src
AppStream-10.0.Z.E2S:firefox-0:140.9.0-1.el10_0.x86_64
AppStream-10.0.Z.E2S:firefox-debuginfo-0:140.9.0-1.el10_0.aarch64
AppStream-10.0.Z.E2S:firefox-debuginfo-0:140.9.0-1.el10_0.ppc64le
AppStream-10.0.Z.E2S:firefox-debuginfo-0:140.9.0-1.el10_0.s390x
AppStream-10.0.Z.E2S:firefox-debuginfo-0:140.9.0-1.el10_0.x86_64
AppStream-10.0.Z.E2S:firefox-debugsource-0:140.9.0-1.el10_0.aarch64
AppStream-10.0.Z.E2S:firefox-debugsource-0:140.9.0-1.el10_0.ppc64le
AppStream-10.0.Z.E2S:firefox-debugsource-0:140.9.0-1.el10_0.s390x
AppStream-10.0.Z.E2S:firefox-debugsource-0:140.9.0-1.el10_0.x86_64
Threats
Impact
Important
A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: Incorrect boundary conditions in the Layout: Text and Fonts component
7.5 (High)
Vendor Fix
For details on how to apply this update, which includes the changes described in this advisory, refer to:
https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2026:7843
Product status
Fixed
AppStream-10.0.Z.E2S:firefox-0:140.9.0-1.el10_0.aarch64
AppStream-10.0.Z.E2S:firefox-0:140.9.0-1.el10_0.ppc64le
AppStream-10.0.Z.E2S:firefox-0:140.9.0-1.el10_0.s390x
AppStream-10.0.Z.E2S:firefox-0:140.9.0-1.el10_0.src
AppStream-10.0.Z.E2S:firefox-0:140.9.0-1.el10_0.x86_64
AppStream-10.0.Z.E2S:firefox-debuginfo-0:140.9.0-1.el10_0.aarch64
AppStream-10.0.Z.E2S:firefox-debuginfo-0:140.9.0-1.el10_0.ppc64le
AppStream-10.0.Z.E2S:firefox-debuginfo-0:140.9.0-1.el10_0.s390x
AppStream-10.0.Z.E2S:firefox-debuginfo-0:140.9.0-1.el10_0.x86_64
AppStream-10.0.Z.E2S:firefox-debugsource-0:140.9.0-1.el10_0.aarch64
AppStream-10.0.Z.E2S:firefox-debugsource-0:140.9.0-1.el10_0.ppc64le
AppStream-10.0.Z.E2S:firefox-debugsource-0:140.9.0-1.el10_0.s390x
AppStream-10.0.Z.E2S:firefox-debugsource-0:140.9.0-1.el10_0.x86_64
Threats
Impact
Important
A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: Mitigation bypass in the Networking: HTTP component
7.5 (High)
Vendor Fix
For details on how to apply this update, which includes the changes described in this advisory, refer to:
https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2026:7843
Product status
Fixed
AppStream-10.0.Z.E2S:firefox-0:140.9.0-1.el10_0.aarch64
AppStream-10.0.Z.E2S:firefox-0:140.9.0-1.el10_0.ppc64le
AppStream-10.0.Z.E2S:firefox-0:140.9.0-1.el10_0.s390x
AppStream-10.0.Z.E2S:firefox-0:140.9.0-1.el10_0.src
AppStream-10.0.Z.E2S:firefox-0:140.9.0-1.el10_0.x86_64
AppStream-10.0.Z.E2S:firefox-debuginfo-0:140.9.0-1.el10_0.aarch64
AppStream-10.0.Z.E2S:firefox-debuginfo-0:140.9.0-1.el10_0.ppc64le
AppStream-10.0.Z.E2S:firefox-debuginfo-0:140.9.0-1.el10_0.s390x
AppStream-10.0.Z.E2S:firefox-debuginfo-0:140.9.0-1.el10_0.x86_64
AppStream-10.0.Z.E2S:firefox-debugsource-0:140.9.0-1.el10_0.aarch64
AppStream-10.0.Z.E2S:firefox-debugsource-0:140.9.0-1.el10_0.ppc64le
AppStream-10.0.Z.E2S:firefox-debugsource-0:140.9.0-1.el10_0.s390x
AppStream-10.0.Z.E2S:firefox-debugsource-0:140.9.0-1.el10_0.x86_64
Threats
Impact
Important
A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: Use-after-free in the JavaScript Engine component
6.1 (Medium)
Vendor Fix
For details on how to apply this update, which includes the changes described in this advisory, refer to:
https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2026:7843
Product status
Fixed
AppStream-10.0.Z.E2S:firefox-0:140.9.0-1.el10_0.aarch64
AppStream-10.0.Z.E2S:firefox-0:140.9.0-1.el10_0.ppc64le
AppStream-10.0.Z.E2S:firefox-0:140.9.0-1.el10_0.s390x
AppStream-10.0.Z.E2S:firefox-0:140.9.0-1.el10_0.src
AppStream-10.0.Z.E2S:firefox-0:140.9.0-1.el10_0.x86_64
AppStream-10.0.Z.E2S:firefox-debuginfo-0:140.9.0-1.el10_0.aarch64
AppStream-10.0.Z.E2S:firefox-debuginfo-0:140.9.0-1.el10_0.ppc64le
AppStream-10.0.Z.E2S:firefox-debuginfo-0:140.9.0-1.el10_0.s390x
AppStream-10.0.Z.E2S:firefox-debuginfo-0:140.9.0-1.el10_0.x86_64
AppStream-10.0.Z.E2S:firefox-debugsource-0:140.9.0-1.el10_0.aarch64
AppStream-10.0.Z.E2S:firefox-debugsource-0:140.9.0-1.el10_0.ppc64le
AppStream-10.0.Z.E2S:firefox-debugsource-0:140.9.0-1.el10_0.s390x
AppStream-10.0.Z.E2S:firefox-debugsource-0:140.9.0-1.el10_0.x86_64
Threats
Impact
Moderate
A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: JIT miscompilation in the JavaScript Engine component
6.1 (Medium)
Vendor Fix
For details on how to apply this update, which includes the changes described in this advisory, refer to:
https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2026:7843
Product status
Fixed
AppStream-10.0.Z.E2S:firefox-0:140.9.0-1.el10_0.aarch64
AppStream-10.0.Z.E2S:firefox-0:140.9.0-1.el10_0.ppc64le
AppStream-10.0.Z.E2S:firefox-0:140.9.0-1.el10_0.s390x
AppStream-10.0.Z.E2S:firefox-0:140.9.0-1.el10_0.src
AppStream-10.0.Z.E2S:firefox-0:140.9.0-1.el10_0.x86_64
AppStream-10.0.Z.E2S:firefox-debuginfo-0:140.9.0-1.el10_0.aarch64
AppStream-10.0.Z.E2S:firefox-debuginfo-0:140.9.0-1.el10_0.ppc64le
AppStream-10.0.Z.E2S:firefox-debuginfo-0:140.9.0-1.el10_0.s390x
AppStream-10.0.Z.E2S:firefox-debuginfo-0:140.9.0-1.el10_0.x86_64
AppStream-10.0.Z.E2S:firefox-debugsource-0:140.9.0-1.el10_0.aarch64
AppStream-10.0.Z.E2S:firefox-debugsource-0:140.9.0-1.el10_0.ppc64le
AppStream-10.0.Z.E2S:firefox-debugsource-0:140.9.0-1.el10_0.s390x
AppStream-10.0.Z.E2S:firefox-debugsource-0:140.9.0-1.el10_0.x86_64
Threats
Impact
Moderate
A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: Denial-of-service in the WebRTC: Signaling component
7.5 (High)
Vendor Fix
For details on how to apply this update, which includes the changes described in this advisory, refer to:
https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2026:7843
Product status
Fixed
AppStream-10.0.Z.E2S:firefox-0:140.9.0-1.el10_0.aarch64
AppStream-10.0.Z.E2S:firefox-0:140.9.0-1.el10_0.ppc64le
AppStream-10.0.Z.E2S:firefox-0:140.9.0-1.el10_0.s390x
AppStream-10.0.Z.E2S:firefox-0:140.9.0-1.el10_0.src
AppStream-10.0.Z.E2S:firefox-0:140.9.0-1.el10_0.x86_64
AppStream-10.0.Z.E2S:firefox-debuginfo-0:140.9.0-1.el10_0.aarch64
AppStream-10.0.Z.E2S:firefox-debuginfo-0:140.9.0-1.el10_0.ppc64le
AppStream-10.0.Z.E2S:firefox-debuginfo-0:140.9.0-1.el10_0.s390x
AppStream-10.0.Z.E2S:firefox-debuginfo-0:140.9.0-1.el10_0.x86_64
AppStream-10.0.Z.E2S:firefox-debugsource-0:140.9.0-1.el10_0.aarch64
AppStream-10.0.Z.E2S:firefox-debugsource-0:140.9.0-1.el10_0.ppc64le
AppStream-10.0.Z.E2S:firefox-debugsource-0:140.9.0-1.el10_0.s390x
AppStream-10.0.Z.E2S:firefox-debugsource-0:140.9.0-1.el10_0.x86_64
Threats
Impact
Moderate
A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: Undefined behavior in the WebRTC: Signaling component
6.5 (Medium)
Vendor Fix
For details on how to apply this update, which includes the changes described in this advisory, refer to:
https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2026:7843
Product status
Fixed
AppStream-10.0.Z.E2S:firefox-0:140.9.0-1.el10_0.aarch64
AppStream-10.0.Z.E2S:firefox-0:140.9.0-1.el10_0.ppc64le
AppStream-10.0.Z.E2S:firefox-0:140.9.0-1.el10_0.s390x
AppStream-10.0.Z.E2S:firefox-0:140.9.0-1.el10_0.src
AppStream-10.0.Z.E2S:firefox-0:140.9.0-1.el10_0.x86_64
AppStream-10.0.Z.E2S:firefox-debuginfo-0:140.9.0-1.el10_0.aarch64
AppStream-10.0.Z.E2S:firefox-debuginfo-0:140.9.0-1.el10_0.ppc64le
AppStream-10.0.Z.E2S:firefox-debuginfo-0:140.9.0-1.el10_0.s390x
AppStream-10.0.Z.E2S:firefox-debuginfo-0:140.9.0-1.el10_0.x86_64
AppStream-10.0.Z.E2S:firefox-debugsource-0:140.9.0-1.el10_0.aarch64
AppStream-10.0.Z.E2S:firefox-debugsource-0:140.9.0-1.el10_0.ppc64le
AppStream-10.0.Z.E2S:firefox-debugsource-0:140.9.0-1.el10_0.s390x
AppStream-10.0.Z.E2S:firefox-debugsource-0:140.9.0-1.el10_0.x86_64
Threats
Impact
Moderate
A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: Incorrect boundary conditions in the Graphics: Canvas2D component
6.1 (Medium)
Vendor Fix
For details on how to apply this update, which includes the changes described in this advisory, refer to:
https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2026:7843
Product status
Fixed
AppStream-10.0.Z.E2S:firefox-0:140.9.0-1.el10_0.aarch64
AppStream-10.0.Z.E2S:firefox-0:140.9.0-1.el10_0.ppc64le
AppStream-10.0.Z.E2S:firefox-0:140.9.0-1.el10_0.s390x
AppStream-10.0.Z.E2S:firefox-0:140.9.0-1.el10_0.src
AppStream-10.0.Z.E2S:firefox-0:140.9.0-1.el10_0.x86_64
AppStream-10.0.Z.E2S:firefox-debuginfo-0:140.9.0-1.el10_0.aarch64
AppStream-10.0.Z.E2S:firefox-debuginfo-0:140.9.0-1.el10_0.ppc64le
AppStream-10.0.Z.E2S:firefox-debuginfo-0:140.9.0-1.el10_0.s390x
AppStream-10.0.Z.E2S:firefox-debuginfo-0:140.9.0-1.el10_0.x86_64
AppStream-10.0.Z.E2S:firefox-debugsource-0:140.9.0-1.el10_0.aarch64
AppStream-10.0.Z.E2S:firefox-debugsource-0:140.9.0-1.el10_0.ppc64le
AppStream-10.0.Z.E2S:firefox-debugsource-0:140.9.0-1.el10_0.s390x
AppStream-10.0.Z.E2S:firefox-debugsource-0:140.9.0-1.el10_0.x86_64
Threats
Impact
Moderate
A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: Incorrect boundary conditions in the Graphics: Canvas2D component
6.1 (Medium)
Vendor Fix
For details on how to apply this update, which includes the changes described in this advisory, refer to:
https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2026:7843
Product status
Fixed
AppStream-10.0.Z.E2S:firefox-0:140.9.0-1.el10_0.aarch64
AppStream-10.0.Z.E2S:firefox-0:140.9.0-1.el10_0.ppc64le
AppStream-10.0.Z.E2S:firefox-0:140.9.0-1.el10_0.s390x
AppStream-10.0.Z.E2S:firefox-0:140.9.0-1.el10_0.src
AppStream-10.0.Z.E2S:firefox-0:140.9.0-1.el10_0.x86_64
AppStream-10.0.Z.E2S:firefox-debuginfo-0:140.9.0-1.el10_0.aarch64
AppStream-10.0.Z.E2S:firefox-debuginfo-0:140.9.0-1.el10_0.ppc64le
AppStream-10.0.Z.E2S:firefox-debuginfo-0:140.9.0-1.el10_0.s390x
AppStream-10.0.Z.E2S:firefox-debuginfo-0:140.9.0-1.el10_0.x86_64
AppStream-10.0.Z.E2S:firefox-debugsource-0:140.9.0-1.el10_0.aarch64
AppStream-10.0.Z.E2S:firefox-debugsource-0:140.9.0-1.el10_0.ppc64le
AppStream-10.0.Z.E2S:firefox-debugsource-0:140.9.0-1.el10_0.s390x
AppStream-10.0.Z.E2S:firefox-debugsource-0:140.9.0-1.el10_0.x86_64
Threats
Impact
Moderate
A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: Incorrect boundary conditions in the Graphics component
6.1 (Medium)
Vendor Fix
For details on how to apply this update, which includes the changes described in this advisory, refer to:
https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2026:7843
Product status
Fixed
AppStream-10.0.Z.E2S:firefox-0:140.9.0-1.el10_0.aarch64
AppStream-10.0.Z.E2S:firefox-0:140.9.0-1.el10_0.ppc64le
AppStream-10.0.Z.E2S:firefox-0:140.9.0-1.el10_0.s390x
AppStream-10.0.Z.E2S:firefox-0:140.9.0-1.el10_0.src
AppStream-10.0.Z.E2S:firefox-0:140.9.0-1.el10_0.x86_64
AppStream-10.0.Z.E2S:firefox-debuginfo-0:140.9.0-1.el10_0.aarch64
AppStream-10.0.Z.E2S:firefox-debuginfo-0:140.9.0-1.el10_0.ppc64le
AppStream-10.0.Z.E2S:firefox-debuginfo-0:140.9.0-1.el10_0.s390x
AppStream-10.0.Z.E2S:firefox-debuginfo-0:140.9.0-1.el10_0.x86_64
AppStream-10.0.Z.E2S:firefox-debugsource-0:140.9.0-1.el10_0.aarch64
AppStream-10.0.Z.E2S:firefox-debugsource-0:140.9.0-1.el10_0.ppc64le
AppStream-10.0.Z.E2S:firefox-debugsource-0:140.9.0-1.el10_0.s390x
AppStream-10.0.Z.E2S:firefox-debugsource-0:140.9.0-1.el10_0.x86_64
Threats
Impact
Moderate
A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: Incorrect boundary conditions in the Audio/Video: GMP component
6.1 (Medium)
Vendor Fix
For details on how to apply this update, which includes the changes described in this advisory, refer to:
https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2026:7843
Product status
Fixed
AppStream-10.0.Z.E2S:firefox-0:140.9.0-1.el10_0.aarch64
AppStream-10.0.Z.E2S:firefox-0:140.9.0-1.el10_0.ppc64le
AppStream-10.0.Z.E2S:firefox-0:140.9.0-1.el10_0.s390x
AppStream-10.0.Z.E2S:firefox-0:140.9.0-1.el10_0.src
AppStream-10.0.Z.E2S:firefox-0:140.9.0-1.el10_0.x86_64
AppStream-10.0.Z.E2S:firefox-debuginfo-0:140.9.0-1.el10_0.aarch64
AppStream-10.0.Z.E2S:firefox-debuginfo-0:140.9.0-1.el10_0.ppc64le
AppStream-10.0.Z.E2S:firefox-debuginfo-0:140.9.0-1.el10_0.s390x
AppStream-10.0.Z.E2S:firefox-debuginfo-0:140.9.0-1.el10_0.x86_64
AppStream-10.0.Z.E2S:firefox-debugsource-0:140.9.0-1.el10_0.aarch64
AppStream-10.0.Z.E2S:firefox-debugsource-0:140.9.0-1.el10_0.ppc64le
AppStream-10.0.Z.E2S:firefox-debugsource-0:140.9.0-1.el10_0.s390x
AppStream-10.0.Z.E2S:firefox-debugsource-0:140.9.0-1.el10_0.x86_64
Threats
Impact
Moderate
A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: Incorrect boundary conditions in the Audio/Video component
6.1 (Medium)
Vendor Fix
For details on how to apply this update, which includes the changes described in this advisory, refer to:
https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2026:7843
Product status
Fixed
AppStream-10.0.Z.E2S:firefox-0:140.9.0-1.el10_0.aarch64
AppStream-10.0.Z.E2S:firefox-0:140.9.0-1.el10_0.ppc64le
AppStream-10.0.Z.E2S:firefox-0:140.9.0-1.el10_0.s390x
AppStream-10.0.Z.E2S:firefox-0:140.9.0-1.el10_0.src
AppStream-10.0.Z.E2S:firefox-0:140.9.0-1.el10_0.x86_64
AppStream-10.0.Z.E2S:firefox-debuginfo-0:140.9.0-1.el10_0.aarch64
AppStream-10.0.Z.E2S:firefox-debuginfo-0:140.9.0-1.el10_0.ppc64le
AppStream-10.0.Z.E2S:firefox-debuginfo-0:140.9.0-1.el10_0.s390x
AppStream-10.0.Z.E2S:firefox-debuginfo-0:140.9.0-1.el10_0.x86_64
AppStream-10.0.Z.E2S:firefox-debugsource-0:140.9.0-1.el10_0.aarch64
AppStream-10.0.Z.E2S:firefox-debugsource-0:140.9.0-1.el10_0.ppc64le
AppStream-10.0.Z.E2S:firefox-debugsource-0:140.9.0-1.el10_0.s390x
AppStream-10.0.Z.E2S:firefox-debugsource-0:140.9.0-1.el10_0.x86_64
Threats
Impact
Moderate
A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: Use-after-free in the Widget: Cocoa component
6.1 (Medium)
Vendor Fix
For details on how to apply this update, which includes the changes described in this advisory, refer to:
https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2026:7843
Product status
Fixed
AppStream-10.0.Z.E2S:firefox-0:140.9.0-1.el10_0.aarch64
AppStream-10.0.Z.E2S:firefox-0:140.9.0-1.el10_0.ppc64le
AppStream-10.0.Z.E2S:firefox-0:140.9.0-1.el10_0.s390x
AppStream-10.0.Z.E2S:firefox-0:140.9.0-1.el10_0.src
AppStream-10.0.Z.E2S:firefox-0:140.9.0-1.el10_0.x86_64
AppStream-10.0.Z.E2S:firefox-debuginfo-0:140.9.0-1.el10_0.aarch64
AppStream-10.0.Z.E2S:firefox-debuginfo-0:140.9.0-1.el10_0.ppc64le
AppStream-10.0.Z.E2S:firefox-debuginfo-0:140.9.0-1.el10_0.s390x
AppStream-10.0.Z.E2S:firefox-debuginfo-0:140.9.0-1.el10_0.x86_64
AppStream-10.0.Z.E2S:firefox-debugsource-0:140.9.0-1.el10_0.aarch64
AppStream-10.0.Z.E2S:firefox-debugsource-0:140.9.0-1.el10_0.ppc64le
AppStream-10.0.Z.E2S:firefox-debugsource-0:140.9.0-1.el10_0.s390x
AppStream-10.0.Z.E2S:firefox-debugsource-0:140.9.0-1.el10_0.x86_64
Threats
Impact
Moderate
A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: Information disclosure in the Widget: Cocoa component
6.5 (Medium)
Vendor Fix
For details on how to apply this update, which includes the changes described in this advisory, refer to:
https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2026:7843
Product status
Fixed
AppStream-10.0.Z.E2S:firefox-0:140.9.0-1.el10_0.aarch64
AppStream-10.0.Z.E2S:firefox-0:140.9.0-1.el10_0.ppc64le
AppStream-10.0.Z.E2S:firefox-0:140.9.0-1.el10_0.s390x
AppStream-10.0.Z.E2S:firefox-0:140.9.0-1.el10_0.src
AppStream-10.0.Z.E2S:firefox-0:140.9.0-1.el10_0.x86_64
AppStream-10.0.Z.E2S:firefox-debuginfo-0:140.9.0-1.el10_0.aarch64
AppStream-10.0.Z.E2S:firefox-debuginfo-0:140.9.0-1.el10_0.ppc64le
AppStream-10.0.Z.E2S:firefox-debuginfo-0:140.9.0-1.el10_0.s390x
AppStream-10.0.Z.E2S:firefox-debuginfo-0:140.9.0-1.el10_0.x86_64
AppStream-10.0.Z.E2S:firefox-debugsource-0:140.9.0-1.el10_0.aarch64
AppStream-10.0.Z.E2S:firefox-debugsource-0:140.9.0-1.el10_0.ppc64le
AppStream-10.0.Z.E2S:firefox-debugsource-0:140.9.0-1.el10_0.s390x
AppStream-10.0.Z.E2S:firefox-debugsource-0:140.9.0-1.el10_0.x86_64
Threats
Impact
Moderate
A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: Incorrect boundary conditions in the Graphics component
6.1 (Medium)
Vendor Fix
For details on how to apply this update, which includes the changes described in this advisory, refer to:
https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2026:7843
Product status
Fixed
AppStream-10.0.Z.E2S:firefox-0:140.9.0-1.el10_0.aarch64
AppStream-10.0.Z.E2S:firefox-0:140.9.0-1.el10_0.ppc64le
AppStream-10.0.Z.E2S:firefox-0:140.9.0-1.el10_0.s390x
AppStream-10.0.Z.E2S:firefox-0:140.9.0-1.el10_0.src
AppStream-10.0.Z.E2S:firefox-0:140.9.0-1.el10_0.x86_64
AppStream-10.0.Z.E2S:firefox-debuginfo-0:140.9.0-1.el10_0.aarch64
AppStream-10.0.Z.E2S:firefox-debuginfo-0:140.9.0-1.el10_0.ppc64le
AppStream-10.0.Z.E2S:firefox-debuginfo-0:140.9.0-1.el10_0.s390x
AppStream-10.0.Z.E2S:firefox-debuginfo-0:140.9.0-1.el10_0.x86_64
AppStream-10.0.Z.E2S:firefox-debugsource-0:140.9.0-1.el10_0.aarch64
AppStream-10.0.Z.E2S:firefox-debugsource-0:140.9.0-1.el10_0.ppc64le
AppStream-10.0.Z.E2S:firefox-debugsource-0:140.9.0-1.el10_0.s390x
AppStream-10.0.Z.E2S:firefox-debugsource-0:140.9.0-1.el10_0.x86_64
Threats
Impact
Moderate
A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: Incorrect boundary conditions in the Audio/Video component
6.5 (Medium)
Vendor Fix
For details on how to apply this update, which includes the changes described in this advisory, refer to:
https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2026:7843
Product status
Fixed
AppStream-10.0.Z.E2S:firefox-0:140.9.0-1.el10_0.aarch64
AppStream-10.0.Z.E2S:firefox-0:140.9.0-1.el10_0.ppc64le
AppStream-10.0.Z.E2S:firefox-0:140.9.0-1.el10_0.s390x
AppStream-10.0.Z.E2S:firefox-0:140.9.0-1.el10_0.src
AppStream-10.0.Z.E2S:firefox-0:140.9.0-1.el10_0.x86_64
AppStream-10.0.Z.E2S:firefox-debuginfo-0:140.9.0-1.el10_0.aarch64
AppStream-10.0.Z.E2S:firefox-debuginfo-0:140.9.0-1.el10_0.ppc64le
AppStream-10.0.Z.E2S:firefox-debuginfo-0:140.9.0-1.el10_0.s390x
AppStream-10.0.Z.E2S:firefox-debuginfo-0:140.9.0-1.el10_0.x86_64
AppStream-10.0.Z.E2S:firefox-debugsource-0:140.9.0-1.el10_0.aarch64
AppStream-10.0.Z.E2S:firefox-debugsource-0:140.9.0-1.el10_0.ppc64le
AppStream-10.0.Z.E2S:firefox-debugsource-0:140.9.0-1.el10_0.s390x
AppStream-10.0.Z.E2S:firefox-debugsource-0:140.9.0-1.el10_0.x86_64
Threats
Impact
Moderate
A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: Uninitialized memory in the Graphics: Canvas2D component
6.5 (Medium)
Vendor Fix
For details on how to apply this update, which includes the changes described in this advisory, refer to:
https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2026:7843
Product status
Fixed
AppStream-10.0.Z.E2S:firefox-0:140.9.0-1.el10_0.aarch64
AppStream-10.0.Z.E2S:firefox-0:140.9.0-1.el10_0.ppc64le
AppStream-10.0.Z.E2S:firefox-0:140.9.0-1.el10_0.s390x
AppStream-10.0.Z.E2S:firefox-0:140.9.0-1.el10_0.src
AppStream-10.0.Z.E2S:firefox-0:140.9.0-1.el10_0.x86_64
AppStream-10.0.Z.E2S:firefox-debuginfo-0:140.9.0-1.el10_0.aarch64
AppStream-10.0.Z.E2S:firefox-debuginfo-0:140.9.0-1.el10_0.ppc64le
AppStream-10.0.Z.E2S:firefox-debuginfo-0:140.9.0-1.el10_0.s390x
AppStream-10.0.Z.E2S:firefox-debuginfo-0:140.9.0-1.el10_0.x86_64
AppStream-10.0.Z.E2S:firefox-debugsource-0:140.9.0-1.el10_0.aarch64
AppStream-10.0.Z.E2S:firefox-debugsource-0:140.9.0-1.el10_0.ppc64le
AppStream-10.0.Z.E2S:firefox-debugsource-0:140.9.0-1.el10_0.s390x
AppStream-10.0.Z.E2S:firefox-debugsource-0:140.9.0-1.el10_0.x86_64
Threats
Impact
Moderate
A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: Incorrect boundary conditions, uninitialized memory in the JavaScript Engine component
6.1 (Medium)
Vendor Fix
For details on how to apply this update, which includes the changes described in this advisory, refer to:
https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2026:7843
Product status
Fixed
AppStream-10.0.Z.E2S:firefox-0:140.9.0-1.el10_0.aarch64
AppStream-10.0.Z.E2S:firefox-0:140.9.0-1.el10_0.ppc64le
AppStream-10.0.Z.E2S:firefox-0:140.9.0-1.el10_0.s390x
AppStream-10.0.Z.E2S:firefox-0:140.9.0-1.el10_0.src
AppStream-10.0.Z.E2S:firefox-0:140.9.0-1.el10_0.x86_64
AppStream-10.0.Z.E2S:firefox-debuginfo-0:140.9.0-1.el10_0.aarch64
AppStream-10.0.Z.E2S:firefox-debuginfo-0:140.9.0-1.el10_0.ppc64le
AppStream-10.0.Z.E2S:firefox-debuginfo-0:140.9.0-1.el10_0.s390x
AppStream-10.0.Z.E2S:firefox-debuginfo-0:140.9.0-1.el10_0.x86_64
AppStream-10.0.Z.E2S:firefox-debugsource-0:140.9.0-1.el10_0.aarch64
AppStream-10.0.Z.E2S:firefox-debugsource-0:140.9.0-1.el10_0.ppc64le
AppStream-10.0.Z.E2S:firefox-debugsource-0:140.9.0-1.el10_0.s390x
AppStream-10.0.Z.E2S:firefox-debugsource-0:140.9.0-1.el10_0.x86_64
Threats
Impact
Moderate
A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: Privilege escalation in the Netmonitor component
6.1 (Medium)
Vendor Fix
For details on how to apply this update, which includes the changes described in this advisory, refer to:
https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2026:7843
Product status
Fixed
AppStream-10.0.Z.E2S:firefox-0:140.9.0-1.el10_0.aarch64
AppStream-10.0.Z.E2S:firefox-0:140.9.0-1.el10_0.ppc64le
AppStream-10.0.Z.E2S:firefox-0:140.9.0-1.el10_0.s390x
AppStream-10.0.Z.E2S:firefox-0:140.9.0-1.el10_0.src
AppStream-10.0.Z.E2S:firefox-0:140.9.0-1.el10_0.x86_64
AppStream-10.0.Z.E2S:firefox-debuginfo-0:140.9.0-1.el10_0.aarch64
AppStream-10.0.Z.E2S:firefox-debuginfo-0:140.9.0-1.el10_0.ppc64le
AppStream-10.0.Z.E2S:firefox-debuginfo-0:140.9.0-1.el10_0.s390x
AppStream-10.0.Z.E2S:firefox-debuginfo-0:140.9.0-1.el10_0.x86_64
AppStream-10.0.Z.E2S:firefox-debugsource-0:140.9.0-1.el10_0.aarch64
AppStream-10.0.Z.E2S:firefox-debugsource-0:140.9.0-1.el10_0.ppc64le
AppStream-10.0.Z.E2S:firefox-debugsource-0:140.9.0-1.el10_0.s390x
AppStream-10.0.Z.E2S:firefox-debugsource-0:140.9.0-1.el10_0.x86_64
Threats
Impact
Moderate
A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: Undefined behavior in the WebRTC: Signaling component
CWE-475 - Undefined Behavior for Input to API
Vendor Fix
For details on how to apply this update, which includes the changes described in this advisory, refer to:
https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2026:7843
Product status
Fixed
AppStream-10.0.Z.E2S:firefox-0:140.9.0-1.el10_0.aarch64
AppStream-10.0.Z.E2S:firefox-0:140.9.0-1.el10_0.ppc64le
AppStream-10.0.Z.E2S:firefox-0:140.9.0-1.el10_0.s390x
AppStream-10.0.Z.E2S:firefox-0:140.9.0-1.el10_0.src
AppStream-10.0.Z.E2S:firefox-0:140.9.0-1.el10_0.x86_64
AppStream-10.0.Z.E2S:firefox-debuginfo-0:140.9.0-1.el10_0.aarch64
AppStream-10.0.Z.E2S:firefox-debuginfo-0:140.9.0-1.el10_0.ppc64le
AppStream-10.0.Z.E2S:firefox-debuginfo-0:140.9.0-1.el10_0.s390x
AppStream-10.0.Z.E2S:firefox-debuginfo-0:140.9.0-1.el10_0.x86_64
AppStream-10.0.Z.E2S:firefox-debugsource-0:140.9.0-1.el10_0.aarch64
AppStream-10.0.Z.E2S:firefox-debugsource-0:140.9.0-1.el10_0.ppc64le
AppStream-10.0.Z.E2S:firefox-debugsource-0:140.9.0-1.el10_0.s390x
AppStream-10.0.Z.E2S:firefox-debugsource-0:140.9.0-1.el10_0.x86_64
Threats
Impact
Low
A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: Incorrect boundary conditions in the Graphics: Text component
CWE-805 - Buffer Access with Incorrect Length Value
Vendor Fix
For details on how to apply this update, which includes the changes described in this advisory, refer to:
https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2026:7843
Product status
Fixed
AppStream-10.0.Z.E2S:firefox-0:140.9.0-1.el10_0.aarch64
AppStream-10.0.Z.E2S:firefox-0:140.9.0-1.el10_0.ppc64le
AppStream-10.0.Z.E2S:firefox-0:140.9.0-1.el10_0.s390x
AppStream-10.0.Z.E2S:firefox-0:140.9.0-1.el10_0.src
AppStream-10.0.Z.E2S:firefox-0:140.9.0-1.el10_0.x86_64
AppStream-10.0.Z.E2S:firefox-debuginfo-0:140.9.0-1.el10_0.aarch64
AppStream-10.0.Z.E2S:firefox-debuginfo-0:140.9.0-1.el10_0.ppc64le
AppStream-10.0.Z.E2S:firefox-debuginfo-0:140.9.0-1.el10_0.s390x
AppStream-10.0.Z.E2S:firefox-debuginfo-0:140.9.0-1.el10_0.x86_64
AppStream-10.0.Z.E2S:firefox-debugsource-0:140.9.0-1.el10_0.aarch64
AppStream-10.0.Z.E2S:firefox-debugsource-0:140.9.0-1.el10_0.ppc64le
AppStream-10.0.Z.E2S:firefox-debugsource-0:140.9.0-1.el10_0.s390x
AppStream-10.0.Z.E2S:firefox-debugsource-0:140.9.0-1.el10_0.x86_64
Threats
Impact
Low
A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: Memory safety bugs present in Firefox ESR 140.8, Thunderbird ESR 140.8, Firefox 148 and Thunderbird 148. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code.
7.5 (High)
Vendor Fix
For details on how to apply this update, which includes the changes described in this advisory, refer to:
https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2026:7843
Product status
Fixed
AppStream-10.0.Z.E2S:firefox-0:140.9.0-1.el10_0.aarch64
AppStream-10.0.Z.E2S:firefox-0:140.9.0-1.el10_0.ppc64le
AppStream-10.0.Z.E2S:firefox-0:140.9.0-1.el10_0.s390x
AppStream-10.0.Z.E2S:firefox-0:140.9.0-1.el10_0.src
AppStream-10.0.Z.E2S:firefox-0:140.9.0-1.el10_0.x86_64
AppStream-10.0.Z.E2S:firefox-debuginfo-0:140.9.0-1.el10_0.aarch64
AppStream-10.0.Z.E2S:firefox-debuginfo-0:140.9.0-1.el10_0.ppc64le
AppStream-10.0.Z.E2S:firefox-debuginfo-0:140.9.0-1.el10_0.s390x
AppStream-10.0.Z.E2S:firefox-debuginfo-0:140.9.0-1.el10_0.x86_64
AppStream-10.0.Z.E2S:firefox-debugsource-0:140.9.0-1.el10_0.aarch64
AppStream-10.0.Z.E2S:firefox-debugsource-0:140.9.0-1.el10_0.ppc64le
AppStream-10.0.Z.E2S:firefox-debugsource-0:140.9.0-1.el10_0.s390x
AppStream-10.0.Z.E2S:firefox-debugsource-0:140.9.0-1.el10_0.x86_64
Threats
Impact
Important
A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: Memory safety bugs present in Firefox ESR 115.33, Firefox ESR 140.8, Thunderbird ESR 140.8, Firefox 148 and Thunderbird 148. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code.
7.5 (High)
Vendor Fix
For details on how to apply this update, which includes the changes described in this advisory, refer to:
https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2026:7843
Product status
Fixed
AppStream-10.0.Z.E2S:firefox-0:140.9.0-1.el10_0.aarch64
AppStream-10.0.Z.E2S:firefox-0:140.9.0-1.el10_0.ppc64le
AppStream-10.0.Z.E2S:firefox-0:140.9.0-1.el10_0.s390x
AppStream-10.0.Z.E2S:firefox-0:140.9.0-1.el10_0.src
AppStream-10.0.Z.E2S:firefox-0:140.9.0-1.el10_0.x86_64
AppStream-10.0.Z.E2S:firefox-debuginfo-0:140.9.0-1.el10_0.aarch64
AppStream-10.0.Z.E2S:firefox-debuginfo-0:140.9.0-1.el10_0.ppc64le
AppStream-10.0.Z.E2S:firefox-debuginfo-0:140.9.0-1.el10_0.s390x
AppStream-10.0.Z.E2S:firefox-debuginfo-0:140.9.0-1.el10_0.x86_64
AppStream-10.0.Z.E2S:firefox-debugsource-0:140.9.0-1.el10_0.aarch64
AppStream-10.0.Z.E2S:firefox-debugsource-0:140.9.0-1.el10_0.ppc64le
AppStream-10.0.Z.E2S:firefox-debugsource-0:140.9.0-1.el10_0.s390x
AppStream-10.0.Z.E2S:firefox-debugsource-0:140.9.0-1.el10_0.x86_64
Threats
Impact
Important
References
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]
},
"references": [
{
"category": "self",
"summary": "Canonical URL",
"url": "https://access.redhat.com/security/cve/CVE-2026-4721"
},
{
"category": "external",
"summary": "RHBZ#2450711",
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2450711"
},
{
"category": "external",
"summary": "https://www.cve.org/CVERecord?id=CVE-2026-4721",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-4721"
},
{
"category": "external",
"summary": "https://nvd.nist.gov/vuln/detail/CVE-2026-4721",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-4721"
},
{
"category": "external",
"summary": "https://www.mozilla.org/security/advisories/mfsa2026-22/#CVE-2026-4721",
"url": "https://www.mozilla.org/security/advisories/mfsa2026-22/#CVE-2026-4721"
},
{
"category": "external",
"summary": "https://www.mozilla.org/security/advisories/mfsa2026-24/#CVE-2026-4721",
"url": "https://www.mozilla.org/security/advisories/mfsa2026-24/#CVE-2026-4721"
}
],
"release_date": "2026-03-24T12:30:44.312000+00:00",
"remediations": [
{
"category": "vendor_fix",
"date": "2026-04-13T10:24:18+00:00",
"details": "For details on how to apply this update, which includes the changes described in this advisory, refer to:\n\nhttps://access.redhat.com/articles/11258",
"product_ids": [
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],
"restart_required": {
"category": "none"
},
"url": "https://access.redhat.com/errata/RHSA-2026:7843"
}
],
"scores": [
{
"cvss_v3": {
"attackComplexity": "HIGH",
"attackVector": "NETWORK",
"availabilityImpact": "HIGH",
"baseScore": 7.5,
"baseSeverity": "HIGH",
"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "REQUIRED",
"vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H",
"version": "3.1"
},
"products": [
"AppStream-10.0.Z.E2S:firefox-0:140.9.0-1.el10_0.aarch64",
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]
}
],
"threats": [
{
"category": "impact",
"details": "Important"
}
],
"title": "firefox: thunderbird: Memory safety bugs fixed in Firefox ESR 115.34, Firefox ESR 140.9, Thunderbird ESR 140.9, Firefox 149 and Thunderbird 149"
}
]
}
RHSA-2026:8284
Vulnerability from csaf_redhat - Published: 2026-04-15 10:54 - Updated: 2026-04-28 18:40Summary
Red Hat Security Advisory: thunderbird security update
Severity
Important
Notes
Topic: An update for thunderbird is now available for Red Hat Enterprise Linux 9.6 Extended Update Support.
Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.
Details: Mozilla Thunderbird is a standalone mail and newsgroup client.
Security Fix(es):
* firefox: thunderbird: Use-after-free in the JavaScript Engine component (CVE-2026-4701)
* firefox: thunderbird: Memory safety bugs fixed in Firefox ESR 115.34, Firefox ESR 140.9, Thunderbird ESR 140.9, Firefox 149 and Thunderbird 149 (CVE-2026-4721)
* firefox: thunderbird: Privilege escalation in the Netmonitor component (CVE-2026-4717)
* firefox: thunderbird: Sandbox escape due to use-after-free in the Disability Access APIs component (CVE-2026-4688)
* firefox: thunderbird: Incorrect boundary conditions in the Graphics: Canvas2D component (CVE-2026-4706)
* firefox: thunderbird: Incorrect boundary conditions in the Audio/Video: Web Codecs component (CVE-2026-4695)
* firefox: thunderbird: Sandbox escape due to incorrect boundary conditions, integer overflow in the XPCOM component (CVE-2026-4689)
* firefox: thunderbird: JIT miscompilation in the JavaScript Engine: JIT component (CVE-2026-4698)
* firefox: thunderbird: Incorrect boundary conditions, uninitialized memory in the JavaScript Engine component (CVE-2026-4716)
* firefox: thunderbird: Race condition, use-after-free in the Graphics: WebRender component (CVE-2026-4684)
* firefox: thunderbird: Undefined behavior in the WebRTC: Signaling component (CVE-2026-4705)
* firefox: thunderbird: Uninitialized memory in the Graphics: Canvas2D component (CVE-2026-4715)
* firefox: thunderbird: Incorrect boundary conditions in the Graphics: Canvas2D component (CVE-2026-4685)
* firefox: thunderbird: Incorrect boundary conditions in the Audio/Video component (CVE-2026-4714)
* firefox: thunderbird: Incorrect boundary conditions in the Audio/Video: GMP component (CVE-2026-4709)
* firefox: thunderbird: Incorrect boundary conditions in the Audio/Video component (CVE-2026-4710)
* firefox: thunderbird: Information disclosure in the Widget: Cocoa component (CVE-2026-4712)
* firefox: thunderbird: Incorrect boundary conditions in the Audio/Video: Web Codecs component (CVE-2026-4697)
* firefox: thunderbird: Incorrect boundary conditions in the Graphics component (CVE-2026-4713)
* firefox: thunderbird: Sandbox escape due to incorrect boundary conditions, integer overflow in the XPCOM component (CVE-2026-4690)
* firefox: thunderbird: Use-after-free in the Widget: Cocoa component (CVE-2026-4711)
* firefox: thunderbird: Incorrect boundary conditions in the Graphics: Canvas2D component (CVE-2026-4686)
* firefox: thunderbird: Incorrect boundary conditions in the Graphics component (CVE-2026-4708)
* firefox: thunderbird: Use-after-free in the CSS Parsing and Computation component (CVE-2026-4691)
* firefox: thunderbird: Incorrect boundary conditions in the Layout: Text and Fonts component (CVE-2026-4699)
* firefox: thunderbird: Use-after-free in the Layout: Text and Fonts component (CVE-2026-4696)
* firefox: thunderbird: Incorrect boundary conditions in the Audio/Video: Playback component (CVE-2026-4693)
* firefox: thunderbird: Undefined behavior in the WebRTC: Signaling component (CVE-2026-4718)
* firefox: thunderbird: JIT miscompilation in the JavaScript Engine component (CVE-2026-4702)
* firefox: thunderbird: Incorrect boundary conditions in the Graphics: Text component (CVE-2026-4719)
* firefox: thunderbird: Incorrect boundary conditions, integer overflow in the Graphics component (CVE-2026-4694)
* firefox: thunderbird: Sandbox escape in the Responsive Design Mode component (CVE-2026-4692)
* firefox: thunderbird: Memory safety bugs fixed in Firefox ESR 140.9, Thunderbird ESR 140.9, Firefox 149 and Thunderbird 149 (CVE-2026-4720)
* firefox: thunderbird: Mitigation bypass in the Networking: HTTP component (CVE-2026-4700)
* firefox: thunderbird: Incorrect boundary conditions in the Graphics: Canvas2D component (CVE-2026-4707)
* firefox: thunderbird: Denial-of-service in the WebRTC: Signaling component (CVE-2026-4704)
* firefox: thunderbird: Sandbox escape due to incorrect boundary conditions in the Telemetry component (CVE-2026-4687)
* thunderbird: Out of bounds read in IMAP parsing (CVE-2026-4371)
* thunderbird: Spoofing issue in Thunderbird (CVE-2026-3889)
For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.
Terms of Use: This content is licensed under the Creative Commons Attribution 4.0 International License (https://creativecommons.org/licenses/by/4.0/). If you distribute this content, or a modified version of it, you must provide attribution to Red Hat Inc. and provide a link to the original.
A flaw was found in Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: Spoofing issue in Thunderbird
5.4 (Medium)
Vendor Fix
For details on how to apply this update, which includes the changes described in this advisory, refer to:
https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2026:8284
Workaround
Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability.
Product status
Fixed
AppStream-9.6.0.Z.EUS:thunderbird-0:140.9.0-1.el9_6.aarch64
AppStream-9.6.0.Z.EUS:thunderbird-0:140.9.0-1.el9_6.ppc64le
AppStream-9.6.0.Z.EUS:thunderbird-0:140.9.0-1.el9_6.s390x
AppStream-9.6.0.Z.EUS:thunderbird-0:140.9.0-1.el9_6.src
AppStream-9.6.0.Z.EUS:thunderbird-0:140.9.0-1.el9_6.x86_64
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AppStream-9.6.0.Z.EUS:thunderbird-debuginfo-0:140.9.0-1.el9_6.s390x
AppStream-9.6.0.Z.EUS:thunderbird-debuginfo-0:140.9.0-1.el9_6.x86_64
AppStream-9.6.0.Z.EUS:thunderbird-debugsource-0:140.9.0-1.el9_6.aarch64
AppStream-9.6.0.Z.EUS:thunderbird-debugsource-0:140.9.0-1.el9_6.ppc64le
AppStream-9.6.0.Z.EUS:thunderbird-debugsource-0:140.9.0-1.el9_6.s390x
AppStream-9.6.0.Z.EUS:thunderbird-debugsource-0:140.9.0-1.el9_6.x86_64
Threats
Impact
Low
A flaw was found in Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: A malicious mail server could send malformed strings with negative lengths, causing the parser to read memory outside the buffer. If a mail server or connection to a mail server were compromised, an attacker could cause the parser to malfunction, potentially crashing Thunderbird or leaking sensitive data.
8.2 (High)
Vendor Fix
For details on how to apply this update, which includes the changes described in this advisory, refer to:
https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2026:8284
Workaround
Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability.
Product status
Fixed
AppStream-9.6.0.Z.EUS:thunderbird-0:140.9.0-1.el9_6.aarch64
AppStream-9.6.0.Z.EUS:thunderbird-0:140.9.0-1.el9_6.ppc64le
AppStream-9.6.0.Z.EUS:thunderbird-0:140.9.0-1.el9_6.s390x
AppStream-9.6.0.Z.EUS:thunderbird-0:140.9.0-1.el9_6.src
AppStream-9.6.0.Z.EUS:thunderbird-0:140.9.0-1.el9_6.x86_64
AppStream-9.6.0.Z.EUS:thunderbird-debuginfo-0:140.9.0-1.el9_6.aarch64
AppStream-9.6.0.Z.EUS:thunderbird-debuginfo-0:140.9.0-1.el9_6.ppc64le
AppStream-9.6.0.Z.EUS:thunderbird-debuginfo-0:140.9.0-1.el9_6.s390x
AppStream-9.6.0.Z.EUS:thunderbird-debuginfo-0:140.9.0-1.el9_6.x86_64
AppStream-9.6.0.Z.EUS:thunderbird-debugsource-0:140.9.0-1.el9_6.aarch64
AppStream-9.6.0.Z.EUS:thunderbird-debugsource-0:140.9.0-1.el9_6.ppc64le
AppStream-9.6.0.Z.EUS:thunderbird-debugsource-0:140.9.0-1.el9_6.s390x
AppStream-9.6.0.Z.EUS:thunderbird-debugsource-0:140.9.0-1.el9_6.x86_64
Threats
Impact
Important
A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: Race condition, use-after-free in the Graphics: WebRender component
7.5 (High)
Vendor Fix
For details on how to apply this update, which includes the changes described in this advisory, refer to:
https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2026:8284
Product status
Fixed
AppStream-9.6.0.Z.EUS:thunderbird-0:140.9.0-1.el9_6.aarch64
AppStream-9.6.0.Z.EUS:thunderbird-0:140.9.0-1.el9_6.ppc64le
AppStream-9.6.0.Z.EUS:thunderbird-0:140.9.0-1.el9_6.s390x
AppStream-9.6.0.Z.EUS:thunderbird-0:140.9.0-1.el9_6.src
AppStream-9.6.0.Z.EUS:thunderbird-0:140.9.0-1.el9_6.x86_64
AppStream-9.6.0.Z.EUS:thunderbird-debuginfo-0:140.9.0-1.el9_6.aarch64
AppStream-9.6.0.Z.EUS:thunderbird-debuginfo-0:140.9.0-1.el9_6.ppc64le
AppStream-9.6.0.Z.EUS:thunderbird-debuginfo-0:140.9.0-1.el9_6.s390x
AppStream-9.6.0.Z.EUS:thunderbird-debuginfo-0:140.9.0-1.el9_6.x86_64
AppStream-9.6.0.Z.EUS:thunderbird-debugsource-0:140.9.0-1.el9_6.aarch64
AppStream-9.6.0.Z.EUS:thunderbird-debugsource-0:140.9.0-1.el9_6.ppc64le
AppStream-9.6.0.Z.EUS:thunderbird-debugsource-0:140.9.0-1.el9_6.s390x
AppStream-9.6.0.Z.EUS:thunderbird-debugsource-0:140.9.0-1.el9_6.x86_64
Threats
Impact
Important
A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: Incorrect boundary conditions in the Graphics: Canvas2D component
7.5 (High)
Vendor Fix
For details on how to apply this update, which includes the changes described in this advisory, refer to:
https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2026:8284
Product status
Fixed
AppStream-9.6.0.Z.EUS:thunderbird-0:140.9.0-1.el9_6.aarch64
AppStream-9.6.0.Z.EUS:thunderbird-0:140.9.0-1.el9_6.ppc64le
AppStream-9.6.0.Z.EUS:thunderbird-0:140.9.0-1.el9_6.s390x
AppStream-9.6.0.Z.EUS:thunderbird-0:140.9.0-1.el9_6.src
AppStream-9.6.0.Z.EUS:thunderbird-0:140.9.0-1.el9_6.x86_64
AppStream-9.6.0.Z.EUS:thunderbird-debuginfo-0:140.9.0-1.el9_6.aarch64
AppStream-9.6.0.Z.EUS:thunderbird-debuginfo-0:140.9.0-1.el9_6.ppc64le
AppStream-9.6.0.Z.EUS:thunderbird-debuginfo-0:140.9.0-1.el9_6.s390x
AppStream-9.6.0.Z.EUS:thunderbird-debuginfo-0:140.9.0-1.el9_6.x86_64
AppStream-9.6.0.Z.EUS:thunderbird-debugsource-0:140.9.0-1.el9_6.aarch64
AppStream-9.6.0.Z.EUS:thunderbird-debugsource-0:140.9.0-1.el9_6.ppc64le
AppStream-9.6.0.Z.EUS:thunderbird-debugsource-0:140.9.0-1.el9_6.s390x
AppStream-9.6.0.Z.EUS:thunderbird-debugsource-0:140.9.0-1.el9_6.x86_64
Threats
Impact
Important
A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: Incorrect boundary conditions in the Graphics: Canvas2D component
7.5 (High)
Vendor Fix
For details on how to apply this update, which includes the changes described in this advisory, refer to:
https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2026:8284
Product status
Fixed
AppStream-9.6.0.Z.EUS:thunderbird-0:140.9.0-1.el9_6.aarch64
AppStream-9.6.0.Z.EUS:thunderbird-0:140.9.0-1.el9_6.ppc64le
AppStream-9.6.0.Z.EUS:thunderbird-0:140.9.0-1.el9_6.s390x
AppStream-9.6.0.Z.EUS:thunderbird-0:140.9.0-1.el9_6.src
AppStream-9.6.0.Z.EUS:thunderbird-0:140.9.0-1.el9_6.x86_64
AppStream-9.6.0.Z.EUS:thunderbird-debuginfo-0:140.9.0-1.el9_6.aarch64
AppStream-9.6.0.Z.EUS:thunderbird-debuginfo-0:140.9.0-1.el9_6.ppc64le
AppStream-9.6.0.Z.EUS:thunderbird-debuginfo-0:140.9.0-1.el9_6.s390x
AppStream-9.6.0.Z.EUS:thunderbird-debuginfo-0:140.9.0-1.el9_6.x86_64
AppStream-9.6.0.Z.EUS:thunderbird-debugsource-0:140.9.0-1.el9_6.aarch64
AppStream-9.6.0.Z.EUS:thunderbird-debugsource-0:140.9.0-1.el9_6.ppc64le
AppStream-9.6.0.Z.EUS:thunderbird-debugsource-0:140.9.0-1.el9_6.s390x
AppStream-9.6.0.Z.EUS:thunderbird-debugsource-0:140.9.0-1.el9_6.x86_64
Threats
Impact
Important
A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: Sandbox escape due to incorrect boundary conditions in the Telemetry component
7.5 (High)
Vendor Fix
For details on how to apply this update, which includes the changes described in this advisory, refer to:
https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2026:8284
Product status
Fixed
AppStream-9.6.0.Z.EUS:thunderbird-0:140.9.0-1.el9_6.aarch64
AppStream-9.6.0.Z.EUS:thunderbird-0:140.9.0-1.el9_6.ppc64le
AppStream-9.6.0.Z.EUS:thunderbird-0:140.9.0-1.el9_6.s390x
AppStream-9.6.0.Z.EUS:thunderbird-0:140.9.0-1.el9_6.src
AppStream-9.6.0.Z.EUS:thunderbird-0:140.9.0-1.el9_6.x86_64
AppStream-9.6.0.Z.EUS:thunderbird-debuginfo-0:140.9.0-1.el9_6.aarch64
AppStream-9.6.0.Z.EUS:thunderbird-debuginfo-0:140.9.0-1.el9_6.ppc64le
AppStream-9.6.0.Z.EUS:thunderbird-debuginfo-0:140.9.0-1.el9_6.s390x
AppStream-9.6.0.Z.EUS:thunderbird-debuginfo-0:140.9.0-1.el9_6.x86_64
AppStream-9.6.0.Z.EUS:thunderbird-debugsource-0:140.9.0-1.el9_6.aarch64
AppStream-9.6.0.Z.EUS:thunderbird-debugsource-0:140.9.0-1.el9_6.ppc64le
AppStream-9.6.0.Z.EUS:thunderbird-debugsource-0:140.9.0-1.el9_6.s390x
AppStream-9.6.0.Z.EUS:thunderbird-debugsource-0:140.9.0-1.el9_6.x86_64
Threats
Impact
Important
A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: Sandbox escape due to use-after-free in the Disability Access APIs component
7.5 (High)
Vendor Fix
For details on how to apply this update, which includes the changes described in this advisory, refer to:
https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2026:8284
Product status
Fixed
AppStream-9.6.0.Z.EUS:thunderbird-0:140.9.0-1.el9_6.aarch64
AppStream-9.6.0.Z.EUS:thunderbird-0:140.9.0-1.el9_6.ppc64le
AppStream-9.6.0.Z.EUS:thunderbird-0:140.9.0-1.el9_6.s390x
AppStream-9.6.0.Z.EUS:thunderbird-0:140.9.0-1.el9_6.src
AppStream-9.6.0.Z.EUS:thunderbird-0:140.9.0-1.el9_6.x86_64
AppStream-9.6.0.Z.EUS:thunderbird-debuginfo-0:140.9.0-1.el9_6.aarch64
AppStream-9.6.0.Z.EUS:thunderbird-debuginfo-0:140.9.0-1.el9_6.ppc64le
AppStream-9.6.0.Z.EUS:thunderbird-debuginfo-0:140.9.0-1.el9_6.s390x
AppStream-9.6.0.Z.EUS:thunderbird-debuginfo-0:140.9.0-1.el9_6.x86_64
AppStream-9.6.0.Z.EUS:thunderbird-debugsource-0:140.9.0-1.el9_6.aarch64
AppStream-9.6.0.Z.EUS:thunderbird-debugsource-0:140.9.0-1.el9_6.ppc64le
AppStream-9.6.0.Z.EUS:thunderbird-debugsource-0:140.9.0-1.el9_6.s390x
AppStream-9.6.0.Z.EUS:thunderbird-debugsource-0:140.9.0-1.el9_6.x86_64
Threats
Impact
Important
A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: Sandbox escape due to incorrect boundary conditions, integer overflow in the XPCOM component
7.5 (High)
Vendor Fix
For details on how to apply this update, which includes the changes described in this advisory, refer to:
https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2026:8284
Product status
Fixed
AppStream-9.6.0.Z.EUS:thunderbird-0:140.9.0-1.el9_6.aarch64
AppStream-9.6.0.Z.EUS:thunderbird-0:140.9.0-1.el9_6.ppc64le
AppStream-9.6.0.Z.EUS:thunderbird-0:140.9.0-1.el9_6.s390x
AppStream-9.6.0.Z.EUS:thunderbird-0:140.9.0-1.el9_6.src
AppStream-9.6.0.Z.EUS:thunderbird-0:140.9.0-1.el9_6.x86_64
AppStream-9.6.0.Z.EUS:thunderbird-debuginfo-0:140.9.0-1.el9_6.aarch64
AppStream-9.6.0.Z.EUS:thunderbird-debuginfo-0:140.9.0-1.el9_6.ppc64le
AppStream-9.6.0.Z.EUS:thunderbird-debuginfo-0:140.9.0-1.el9_6.s390x
AppStream-9.6.0.Z.EUS:thunderbird-debuginfo-0:140.9.0-1.el9_6.x86_64
AppStream-9.6.0.Z.EUS:thunderbird-debugsource-0:140.9.0-1.el9_6.aarch64
AppStream-9.6.0.Z.EUS:thunderbird-debugsource-0:140.9.0-1.el9_6.ppc64le
AppStream-9.6.0.Z.EUS:thunderbird-debugsource-0:140.9.0-1.el9_6.s390x
AppStream-9.6.0.Z.EUS:thunderbird-debugsource-0:140.9.0-1.el9_6.x86_64
Threats
Impact
Important
A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: Sandbox escape due to incorrect boundary conditions, integer overflow in the XPCOM component
7.5 (High)
Vendor Fix
For details on how to apply this update, which includes the changes described in this advisory, refer to:
https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2026:8284
Product status
Fixed
AppStream-9.6.0.Z.EUS:thunderbird-0:140.9.0-1.el9_6.aarch64
AppStream-9.6.0.Z.EUS:thunderbird-0:140.9.0-1.el9_6.ppc64le
AppStream-9.6.0.Z.EUS:thunderbird-0:140.9.0-1.el9_6.s390x
AppStream-9.6.0.Z.EUS:thunderbird-0:140.9.0-1.el9_6.src
AppStream-9.6.0.Z.EUS:thunderbird-0:140.9.0-1.el9_6.x86_64
AppStream-9.6.0.Z.EUS:thunderbird-debuginfo-0:140.9.0-1.el9_6.aarch64
AppStream-9.6.0.Z.EUS:thunderbird-debuginfo-0:140.9.0-1.el9_6.ppc64le
AppStream-9.6.0.Z.EUS:thunderbird-debuginfo-0:140.9.0-1.el9_6.s390x
AppStream-9.6.0.Z.EUS:thunderbird-debuginfo-0:140.9.0-1.el9_6.x86_64
AppStream-9.6.0.Z.EUS:thunderbird-debugsource-0:140.9.0-1.el9_6.aarch64
AppStream-9.6.0.Z.EUS:thunderbird-debugsource-0:140.9.0-1.el9_6.ppc64le
AppStream-9.6.0.Z.EUS:thunderbird-debugsource-0:140.9.0-1.el9_6.s390x
AppStream-9.6.0.Z.EUS:thunderbird-debugsource-0:140.9.0-1.el9_6.x86_64
Threats
Impact
Important
A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: Use-after-free in the CSS Parsing and Computation component
7.5 (High)
Vendor Fix
For details on how to apply this update, which includes the changes described in this advisory, refer to:
https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2026:8284
Product status
Fixed
AppStream-9.6.0.Z.EUS:thunderbird-0:140.9.0-1.el9_6.aarch64
AppStream-9.6.0.Z.EUS:thunderbird-0:140.9.0-1.el9_6.ppc64le
AppStream-9.6.0.Z.EUS:thunderbird-0:140.9.0-1.el9_6.s390x
AppStream-9.6.0.Z.EUS:thunderbird-0:140.9.0-1.el9_6.src
AppStream-9.6.0.Z.EUS:thunderbird-0:140.9.0-1.el9_6.x86_64
AppStream-9.6.0.Z.EUS:thunderbird-debuginfo-0:140.9.0-1.el9_6.aarch64
AppStream-9.6.0.Z.EUS:thunderbird-debuginfo-0:140.9.0-1.el9_6.ppc64le
AppStream-9.6.0.Z.EUS:thunderbird-debuginfo-0:140.9.0-1.el9_6.s390x
AppStream-9.6.0.Z.EUS:thunderbird-debuginfo-0:140.9.0-1.el9_6.x86_64
AppStream-9.6.0.Z.EUS:thunderbird-debugsource-0:140.9.0-1.el9_6.aarch64
AppStream-9.6.0.Z.EUS:thunderbird-debugsource-0:140.9.0-1.el9_6.ppc64le
AppStream-9.6.0.Z.EUS:thunderbird-debugsource-0:140.9.0-1.el9_6.s390x
AppStream-9.6.0.Z.EUS:thunderbird-debugsource-0:140.9.0-1.el9_6.x86_64
Threats
Impact
Important
A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: Sandbox escape in the Responsive Design Mode component
7.5 (High)
Vendor Fix
For details on how to apply this update, which includes the changes described in this advisory, refer to:
https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2026:8284
Product status
Fixed
AppStream-9.6.0.Z.EUS:thunderbird-0:140.9.0-1.el9_6.aarch64
AppStream-9.6.0.Z.EUS:thunderbird-0:140.9.0-1.el9_6.ppc64le
AppStream-9.6.0.Z.EUS:thunderbird-0:140.9.0-1.el9_6.s390x
AppStream-9.6.0.Z.EUS:thunderbird-0:140.9.0-1.el9_6.src
AppStream-9.6.0.Z.EUS:thunderbird-0:140.9.0-1.el9_6.x86_64
AppStream-9.6.0.Z.EUS:thunderbird-debuginfo-0:140.9.0-1.el9_6.aarch64
AppStream-9.6.0.Z.EUS:thunderbird-debuginfo-0:140.9.0-1.el9_6.ppc64le
AppStream-9.6.0.Z.EUS:thunderbird-debuginfo-0:140.9.0-1.el9_6.s390x
AppStream-9.6.0.Z.EUS:thunderbird-debuginfo-0:140.9.0-1.el9_6.x86_64
AppStream-9.6.0.Z.EUS:thunderbird-debugsource-0:140.9.0-1.el9_6.aarch64
AppStream-9.6.0.Z.EUS:thunderbird-debugsource-0:140.9.0-1.el9_6.ppc64le
AppStream-9.6.0.Z.EUS:thunderbird-debugsource-0:140.9.0-1.el9_6.s390x
AppStream-9.6.0.Z.EUS:thunderbird-debugsource-0:140.9.0-1.el9_6.x86_64
Threats
Impact
Important
A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: Incorrect boundary conditions in the Audio/Video: Playback component
7.5 (High)
Vendor Fix
For details on how to apply this update, which includes the changes described in this advisory, refer to:
https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2026:8284
Product status
Fixed
AppStream-9.6.0.Z.EUS:thunderbird-0:140.9.0-1.el9_6.aarch64
AppStream-9.6.0.Z.EUS:thunderbird-0:140.9.0-1.el9_6.ppc64le
AppStream-9.6.0.Z.EUS:thunderbird-0:140.9.0-1.el9_6.s390x
AppStream-9.6.0.Z.EUS:thunderbird-0:140.9.0-1.el9_6.src
AppStream-9.6.0.Z.EUS:thunderbird-0:140.9.0-1.el9_6.x86_64
AppStream-9.6.0.Z.EUS:thunderbird-debuginfo-0:140.9.0-1.el9_6.aarch64
AppStream-9.6.0.Z.EUS:thunderbird-debuginfo-0:140.9.0-1.el9_6.ppc64le
AppStream-9.6.0.Z.EUS:thunderbird-debuginfo-0:140.9.0-1.el9_6.s390x
AppStream-9.6.0.Z.EUS:thunderbird-debuginfo-0:140.9.0-1.el9_6.x86_64
AppStream-9.6.0.Z.EUS:thunderbird-debugsource-0:140.9.0-1.el9_6.aarch64
AppStream-9.6.0.Z.EUS:thunderbird-debugsource-0:140.9.0-1.el9_6.ppc64le
AppStream-9.6.0.Z.EUS:thunderbird-debugsource-0:140.9.0-1.el9_6.s390x
AppStream-9.6.0.Z.EUS:thunderbird-debugsource-0:140.9.0-1.el9_6.x86_64
Threats
Impact
Important
A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: Incorrect boundary conditions, integer overflow in the Graphics component
7.5 (High)
Vendor Fix
For details on how to apply this update, which includes the changes described in this advisory, refer to:
https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2026:8284
Product status
Fixed
AppStream-9.6.0.Z.EUS:thunderbird-0:140.9.0-1.el9_6.aarch64
AppStream-9.6.0.Z.EUS:thunderbird-0:140.9.0-1.el9_6.ppc64le
AppStream-9.6.0.Z.EUS:thunderbird-0:140.9.0-1.el9_6.s390x
AppStream-9.6.0.Z.EUS:thunderbird-0:140.9.0-1.el9_6.src
AppStream-9.6.0.Z.EUS:thunderbird-0:140.9.0-1.el9_6.x86_64
AppStream-9.6.0.Z.EUS:thunderbird-debuginfo-0:140.9.0-1.el9_6.aarch64
AppStream-9.6.0.Z.EUS:thunderbird-debuginfo-0:140.9.0-1.el9_6.ppc64le
AppStream-9.6.0.Z.EUS:thunderbird-debuginfo-0:140.9.0-1.el9_6.s390x
AppStream-9.6.0.Z.EUS:thunderbird-debuginfo-0:140.9.0-1.el9_6.x86_64
AppStream-9.6.0.Z.EUS:thunderbird-debugsource-0:140.9.0-1.el9_6.aarch64
AppStream-9.6.0.Z.EUS:thunderbird-debugsource-0:140.9.0-1.el9_6.ppc64le
AppStream-9.6.0.Z.EUS:thunderbird-debugsource-0:140.9.0-1.el9_6.s390x
AppStream-9.6.0.Z.EUS:thunderbird-debugsource-0:140.9.0-1.el9_6.x86_64
Threats
Impact
Important
A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: Incorrect boundary conditions in the Audio/Video: Web Codecs component
7.5 (High)
Vendor Fix
For details on how to apply this update, which includes the changes described in this advisory, refer to:
https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2026:8284
Product status
Fixed
AppStream-9.6.0.Z.EUS:thunderbird-0:140.9.0-1.el9_6.aarch64
AppStream-9.6.0.Z.EUS:thunderbird-0:140.9.0-1.el9_6.ppc64le
AppStream-9.6.0.Z.EUS:thunderbird-0:140.9.0-1.el9_6.s390x
AppStream-9.6.0.Z.EUS:thunderbird-0:140.9.0-1.el9_6.src
AppStream-9.6.0.Z.EUS:thunderbird-0:140.9.0-1.el9_6.x86_64
AppStream-9.6.0.Z.EUS:thunderbird-debuginfo-0:140.9.0-1.el9_6.aarch64
AppStream-9.6.0.Z.EUS:thunderbird-debuginfo-0:140.9.0-1.el9_6.ppc64le
AppStream-9.6.0.Z.EUS:thunderbird-debuginfo-0:140.9.0-1.el9_6.s390x
AppStream-9.6.0.Z.EUS:thunderbird-debuginfo-0:140.9.0-1.el9_6.x86_64
AppStream-9.6.0.Z.EUS:thunderbird-debugsource-0:140.9.0-1.el9_6.aarch64
AppStream-9.6.0.Z.EUS:thunderbird-debugsource-0:140.9.0-1.el9_6.ppc64le
AppStream-9.6.0.Z.EUS:thunderbird-debugsource-0:140.9.0-1.el9_6.s390x
AppStream-9.6.0.Z.EUS:thunderbird-debugsource-0:140.9.0-1.el9_6.x86_64
Threats
Impact
Important
A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: Use-after-free in the Layout: Text and Fonts component
7.5 (High)
Vendor Fix
For details on how to apply this update, which includes the changes described in this advisory, refer to:
https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2026:8284
Product status
Fixed
AppStream-9.6.0.Z.EUS:thunderbird-0:140.9.0-1.el9_6.aarch64
AppStream-9.6.0.Z.EUS:thunderbird-0:140.9.0-1.el9_6.ppc64le
AppStream-9.6.0.Z.EUS:thunderbird-0:140.9.0-1.el9_6.s390x
AppStream-9.6.0.Z.EUS:thunderbird-0:140.9.0-1.el9_6.src
AppStream-9.6.0.Z.EUS:thunderbird-0:140.9.0-1.el9_6.x86_64
AppStream-9.6.0.Z.EUS:thunderbird-debuginfo-0:140.9.0-1.el9_6.aarch64
AppStream-9.6.0.Z.EUS:thunderbird-debuginfo-0:140.9.0-1.el9_6.ppc64le
AppStream-9.6.0.Z.EUS:thunderbird-debuginfo-0:140.9.0-1.el9_6.s390x
AppStream-9.6.0.Z.EUS:thunderbird-debuginfo-0:140.9.0-1.el9_6.x86_64
AppStream-9.6.0.Z.EUS:thunderbird-debugsource-0:140.9.0-1.el9_6.aarch64
AppStream-9.6.0.Z.EUS:thunderbird-debugsource-0:140.9.0-1.el9_6.ppc64le
AppStream-9.6.0.Z.EUS:thunderbird-debugsource-0:140.9.0-1.el9_6.s390x
AppStream-9.6.0.Z.EUS:thunderbird-debugsource-0:140.9.0-1.el9_6.x86_64
Threats
Impact
Important
A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: Incorrect boundary conditions in the Audio/Video: Web Codecs component
7.5 (High)
Vendor Fix
For details on how to apply this update, which includes the changes described in this advisory, refer to:
https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2026:8284
Product status
Fixed
AppStream-9.6.0.Z.EUS:thunderbird-0:140.9.0-1.el9_6.aarch64
AppStream-9.6.0.Z.EUS:thunderbird-0:140.9.0-1.el9_6.ppc64le
AppStream-9.6.0.Z.EUS:thunderbird-0:140.9.0-1.el9_6.s390x
AppStream-9.6.0.Z.EUS:thunderbird-0:140.9.0-1.el9_6.src
AppStream-9.6.0.Z.EUS:thunderbird-0:140.9.0-1.el9_6.x86_64
AppStream-9.6.0.Z.EUS:thunderbird-debuginfo-0:140.9.0-1.el9_6.aarch64
AppStream-9.6.0.Z.EUS:thunderbird-debuginfo-0:140.9.0-1.el9_6.ppc64le
AppStream-9.6.0.Z.EUS:thunderbird-debuginfo-0:140.9.0-1.el9_6.s390x
AppStream-9.6.0.Z.EUS:thunderbird-debuginfo-0:140.9.0-1.el9_6.x86_64
AppStream-9.6.0.Z.EUS:thunderbird-debugsource-0:140.9.0-1.el9_6.aarch64
AppStream-9.6.0.Z.EUS:thunderbird-debugsource-0:140.9.0-1.el9_6.ppc64le
AppStream-9.6.0.Z.EUS:thunderbird-debugsource-0:140.9.0-1.el9_6.s390x
AppStream-9.6.0.Z.EUS:thunderbird-debugsource-0:140.9.0-1.el9_6.x86_64
Threats
Impact
Important
A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: JIT miscompilation in the JavaScript Engine: JIT component
7.5 (High)
Vendor Fix
For details on how to apply this update, which includes the changes described in this advisory, refer to:
https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2026:8284
Product status
Fixed
AppStream-9.6.0.Z.EUS:thunderbird-0:140.9.0-1.el9_6.aarch64
AppStream-9.6.0.Z.EUS:thunderbird-0:140.9.0-1.el9_6.ppc64le
AppStream-9.6.0.Z.EUS:thunderbird-0:140.9.0-1.el9_6.s390x
AppStream-9.6.0.Z.EUS:thunderbird-0:140.9.0-1.el9_6.src
AppStream-9.6.0.Z.EUS:thunderbird-0:140.9.0-1.el9_6.x86_64
AppStream-9.6.0.Z.EUS:thunderbird-debuginfo-0:140.9.0-1.el9_6.aarch64
AppStream-9.6.0.Z.EUS:thunderbird-debuginfo-0:140.9.0-1.el9_6.ppc64le
AppStream-9.6.0.Z.EUS:thunderbird-debuginfo-0:140.9.0-1.el9_6.s390x
AppStream-9.6.0.Z.EUS:thunderbird-debuginfo-0:140.9.0-1.el9_6.x86_64
AppStream-9.6.0.Z.EUS:thunderbird-debugsource-0:140.9.0-1.el9_6.aarch64
AppStream-9.6.0.Z.EUS:thunderbird-debugsource-0:140.9.0-1.el9_6.ppc64le
AppStream-9.6.0.Z.EUS:thunderbird-debugsource-0:140.9.0-1.el9_6.s390x
AppStream-9.6.0.Z.EUS:thunderbird-debugsource-0:140.9.0-1.el9_6.x86_64
Threats
Impact
Important
A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: Incorrect boundary conditions in the Layout: Text and Fonts component
7.5 (High)
Vendor Fix
For details on how to apply this update, which includes the changes described in this advisory, refer to:
https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2026:8284
Product status
Fixed
AppStream-9.6.0.Z.EUS:thunderbird-0:140.9.0-1.el9_6.aarch64
AppStream-9.6.0.Z.EUS:thunderbird-0:140.9.0-1.el9_6.ppc64le
AppStream-9.6.0.Z.EUS:thunderbird-0:140.9.0-1.el9_6.s390x
AppStream-9.6.0.Z.EUS:thunderbird-0:140.9.0-1.el9_6.src
AppStream-9.6.0.Z.EUS:thunderbird-0:140.9.0-1.el9_6.x86_64
AppStream-9.6.0.Z.EUS:thunderbird-debuginfo-0:140.9.0-1.el9_6.aarch64
AppStream-9.6.0.Z.EUS:thunderbird-debuginfo-0:140.9.0-1.el9_6.ppc64le
AppStream-9.6.0.Z.EUS:thunderbird-debuginfo-0:140.9.0-1.el9_6.s390x
AppStream-9.6.0.Z.EUS:thunderbird-debuginfo-0:140.9.0-1.el9_6.x86_64
AppStream-9.6.0.Z.EUS:thunderbird-debugsource-0:140.9.0-1.el9_6.aarch64
AppStream-9.6.0.Z.EUS:thunderbird-debugsource-0:140.9.0-1.el9_6.ppc64le
AppStream-9.6.0.Z.EUS:thunderbird-debugsource-0:140.9.0-1.el9_6.s390x
AppStream-9.6.0.Z.EUS:thunderbird-debugsource-0:140.9.0-1.el9_6.x86_64
Threats
Impact
Important
A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: Mitigation bypass in the Networking: HTTP component
7.5 (High)
Vendor Fix
For details on how to apply this update, which includes the changes described in this advisory, refer to:
https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2026:8284
Product status
Fixed
AppStream-9.6.0.Z.EUS:thunderbird-0:140.9.0-1.el9_6.aarch64
AppStream-9.6.0.Z.EUS:thunderbird-0:140.9.0-1.el9_6.ppc64le
AppStream-9.6.0.Z.EUS:thunderbird-0:140.9.0-1.el9_6.s390x
AppStream-9.6.0.Z.EUS:thunderbird-0:140.9.0-1.el9_6.src
AppStream-9.6.0.Z.EUS:thunderbird-0:140.9.0-1.el9_6.x86_64
AppStream-9.6.0.Z.EUS:thunderbird-debuginfo-0:140.9.0-1.el9_6.aarch64
AppStream-9.6.0.Z.EUS:thunderbird-debuginfo-0:140.9.0-1.el9_6.ppc64le
AppStream-9.6.0.Z.EUS:thunderbird-debuginfo-0:140.9.0-1.el9_6.s390x
AppStream-9.6.0.Z.EUS:thunderbird-debuginfo-0:140.9.0-1.el9_6.x86_64
AppStream-9.6.0.Z.EUS:thunderbird-debugsource-0:140.9.0-1.el9_6.aarch64
AppStream-9.6.0.Z.EUS:thunderbird-debugsource-0:140.9.0-1.el9_6.ppc64le
AppStream-9.6.0.Z.EUS:thunderbird-debugsource-0:140.9.0-1.el9_6.s390x
AppStream-9.6.0.Z.EUS:thunderbird-debugsource-0:140.9.0-1.el9_6.x86_64
Threats
Impact
Important
A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: Use-after-free in the JavaScript Engine component
6.1 (Medium)
Vendor Fix
For details on how to apply this update, which includes the changes described in this advisory, refer to:
https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2026:8284
Product status
Fixed
AppStream-9.6.0.Z.EUS:thunderbird-0:140.9.0-1.el9_6.aarch64
AppStream-9.6.0.Z.EUS:thunderbird-0:140.9.0-1.el9_6.ppc64le
AppStream-9.6.0.Z.EUS:thunderbird-0:140.9.0-1.el9_6.s390x
AppStream-9.6.0.Z.EUS:thunderbird-0:140.9.0-1.el9_6.src
AppStream-9.6.0.Z.EUS:thunderbird-0:140.9.0-1.el9_6.x86_64
AppStream-9.6.0.Z.EUS:thunderbird-debuginfo-0:140.9.0-1.el9_6.aarch64
AppStream-9.6.0.Z.EUS:thunderbird-debuginfo-0:140.9.0-1.el9_6.ppc64le
AppStream-9.6.0.Z.EUS:thunderbird-debuginfo-0:140.9.0-1.el9_6.s390x
AppStream-9.6.0.Z.EUS:thunderbird-debuginfo-0:140.9.0-1.el9_6.x86_64
AppStream-9.6.0.Z.EUS:thunderbird-debugsource-0:140.9.0-1.el9_6.aarch64
AppStream-9.6.0.Z.EUS:thunderbird-debugsource-0:140.9.0-1.el9_6.ppc64le
AppStream-9.6.0.Z.EUS:thunderbird-debugsource-0:140.9.0-1.el9_6.s390x
AppStream-9.6.0.Z.EUS:thunderbird-debugsource-0:140.9.0-1.el9_6.x86_64
Threats
Impact
Moderate
A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: JIT miscompilation in the JavaScript Engine component
6.1 (Medium)
Vendor Fix
For details on how to apply this update, which includes the changes described in this advisory, refer to:
https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2026:8284
Product status
Fixed
AppStream-9.6.0.Z.EUS:thunderbird-0:140.9.0-1.el9_6.aarch64
AppStream-9.6.0.Z.EUS:thunderbird-0:140.9.0-1.el9_6.ppc64le
AppStream-9.6.0.Z.EUS:thunderbird-0:140.9.0-1.el9_6.s390x
AppStream-9.6.0.Z.EUS:thunderbird-0:140.9.0-1.el9_6.src
AppStream-9.6.0.Z.EUS:thunderbird-0:140.9.0-1.el9_6.x86_64
AppStream-9.6.0.Z.EUS:thunderbird-debuginfo-0:140.9.0-1.el9_6.aarch64
AppStream-9.6.0.Z.EUS:thunderbird-debuginfo-0:140.9.0-1.el9_6.ppc64le
AppStream-9.6.0.Z.EUS:thunderbird-debuginfo-0:140.9.0-1.el9_6.s390x
AppStream-9.6.0.Z.EUS:thunderbird-debuginfo-0:140.9.0-1.el9_6.x86_64
AppStream-9.6.0.Z.EUS:thunderbird-debugsource-0:140.9.0-1.el9_6.aarch64
AppStream-9.6.0.Z.EUS:thunderbird-debugsource-0:140.9.0-1.el9_6.ppc64le
AppStream-9.6.0.Z.EUS:thunderbird-debugsource-0:140.9.0-1.el9_6.s390x
AppStream-9.6.0.Z.EUS:thunderbird-debugsource-0:140.9.0-1.el9_6.x86_64
Threats
Impact
Moderate
A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: Denial-of-service in the WebRTC: Signaling component
7.5 (High)
Vendor Fix
For details on how to apply this update, which includes the changes described in this advisory, refer to:
https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2026:8284
Product status
Fixed
AppStream-9.6.0.Z.EUS:thunderbird-0:140.9.0-1.el9_6.aarch64
AppStream-9.6.0.Z.EUS:thunderbird-0:140.9.0-1.el9_6.ppc64le
AppStream-9.6.0.Z.EUS:thunderbird-0:140.9.0-1.el9_6.s390x
AppStream-9.6.0.Z.EUS:thunderbird-0:140.9.0-1.el9_6.src
AppStream-9.6.0.Z.EUS:thunderbird-0:140.9.0-1.el9_6.x86_64
AppStream-9.6.0.Z.EUS:thunderbird-debuginfo-0:140.9.0-1.el9_6.aarch64
AppStream-9.6.0.Z.EUS:thunderbird-debuginfo-0:140.9.0-1.el9_6.ppc64le
AppStream-9.6.0.Z.EUS:thunderbird-debuginfo-0:140.9.0-1.el9_6.s390x
AppStream-9.6.0.Z.EUS:thunderbird-debuginfo-0:140.9.0-1.el9_6.x86_64
AppStream-9.6.0.Z.EUS:thunderbird-debugsource-0:140.9.0-1.el9_6.aarch64
AppStream-9.6.0.Z.EUS:thunderbird-debugsource-0:140.9.0-1.el9_6.ppc64le
AppStream-9.6.0.Z.EUS:thunderbird-debugsource-0:140.9.0-1.el9_6.s390x
AppStream-9.6.0.Z.EUS:thunderbird-debugsource-0:140.9.0-1.el9_6.x86_64
Threats
Impact
Moderate
A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: Undefined behavior in the WebRTC: Signaling component
6.5 (Medium)
Vendor Fix
For details on how to apply this update, which includes the changes described in this advisory, refer to:
https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2026:8284
Product status
Fixed
AppStream-9.6.0.Z.EUS:thunderbird-0:140.9.0-1.el9_6.aarch64
AppStream-9.6.0.Z.EUS:thunderbird-0:140.9.0-1.el9_6.ppc64le
AppStream-9.6.0.Z.EUS:thunderbird-0:140.9.0-1.el9_6.s390x
AppStream-9.6.0.Z.EUS:thunderbird-0:140.9.0-1.el9_6.src
AppStream-9.6.0.Z.EUS:thunderbird-0:140.9.0-1.el9_6.x86_64
AppStream-9.6.0.Z.EUS:thunderbird-debuginfo-0:140.9.0-1.el9_6.aarch64
AppStream-9.6.0.Z.EUS:thunderbird-debuginfo-0:140.9.0-1.el9_6.ppc64le
AppStream-9.6.0.Z.EUS:thunderbird-debuginfo-0:140.9.0-1.el9_6.s390x
AppStream-9.6.0.Z.EUS:thunderbird-debuginfo-0:140.9.0-1.el9_6.x86_64
AppStream-9.6.0.Z.EUS:thunderbird-debugsource-0:140.9.0-1.el9_6.aarch64
AppStream-9.6.0.Z.EUS:thunderbird-debugsource-0:140.9.0-1.el9_6.ppc64le
AppStream-9.6.0.Z.EUS:thunderbird-debugsource-0:140.9.0-1.el9_6.s390x
AppStream-9.6.0.Z.EUS:thunderbird-debugsource-0:140.9.0-1.el9_6.x86_64
Threats
Impact
Moderate
A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: Incorrect boundary conditions in the Graphics: Canvas2D component
6.1 (Medium)
Vendor Fix
For details on how to apply this update, which includes the changes described in this advisory, refer to:
https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2026:8284
Product status
Fixed
AppStream-9.6.0.Z.EUS:thunderbird-0:140.9.0-1.el9_6.aarch64
AppStream-9.6.0.Z.EUS:thunderbird-0:140.9.0-1.el9_6.ppc64le
AppStream-9.6.0.Z.EUS:thunderbird-0:140.9.0-1.el9_6.s390x
AppStream-9.6.0.Z.EUS:thunderbird-0:140.9.0-1.el9_6.src
AppStream-9.6.0.Z.EUS:thunderbird-0:140.9.0-1.el9_6.x86_64
AppStream-9.6.0.Z.EUS:thunderbird-debuginfo-0:140.9.0-1.el9_6.aarch64
AppStream-9.6.0.Z.EUS:thunderbird-debuginfo-0:140.9.0-1.el9_6.ppc64le
AppStream-9.6.0.Z.EUS:thunderbird-debuginfo-0:140.9.0-1.el9_6.s390x
AppStream-9.6.0.Z.EUS:thunderbird-debuginfo-0:140.9.0-1.el9_6.x86_64
AppStream-9.6.0.Z.EUS:thunderbird-debugsource-0:140.9.0-1.el9_6.aarch64
AppStream-9.6.0.Z.EUS:thunderbird-debugsource-0:140.9.0-1.el9_6.ppc64le
AppStream-9.6.0.Z.EUS:thunderbird-debugsource-0:140.9.0-1.el9_6.s390x
AppStream-9.6.0.Z.EUS:thunderbird-debugsource-0:140.9.0-1.el9_6.x86_64
Threats
Impact
Moderate
A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: Incorrect boundary conditions in the Graphics: Canvas2D component
6.1 (Medium)
Vendor Fix
For details on how to apply this update, which includes the changes described in this advisory, refer to:
https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2026:8284
Product status
Fixed
AppStream-9.6.0.Z.EUS:thunderbird-0:140.9.0-1.el9_6.aarch64
AppStream-9.6.0.Z.EUS:thunderbird-0:140.9.0-1.el9_6.ppc64le
AppStream-9.6.0.Z.EUS:thunderbird-0:140.9.0-1.el9_6.s390x
AppStream-9.6.0.Z.EUS:thunderbird-0:140.9.0-1.el9_6.src
AppStream-9.6.0.Z.EUS:thunderbird-0:140.9.0-1.el9_6.x86_64
AppStream-9.6.0.Z.EUS:thunderbird-debuginfo-0:140.9.0-1.el9_6.aarch64
AppStream-9.6.0.Z.EUS:thunderbird-debuginfo-0:140.9.0-1.el9_6.ppc64le
AppStream-9.6.0.Z.EUS:thunderbird-debuginfo-0:140.9.0-1.el9_6.s390x
AppStream-9.6.0.Z.EUS:thunderbird-debuginfo-0:140.9.0-1.el9_6.x86_64
AppStream-9.6.0.Z.EUS:thunderbird-debugsource-0:140.9.0-1.el9_6.aarch64
AppStream-9.6.0.Z.EUS:thunderbird-debugsource-0:140.9.0-1.el9_6.ppc64le
AppStream-9.6.0.Z.EUS:thunderbird-debugsource-0:140.9.0-1.el9_6.s390x
AppStream-9.6.0.Z.EUS:thunderbird-debugsource-0:140.9.0-1.el9_6.x86_64
Threats
Impact
Moderate
A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: Incorrect boundary conditions in the Graphics component
6.1 (Medium)
Vendor Fix
For details on how to apply this update, which includes the changes described in this advisory, refer to:
https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2026:8284
Product status
Fixed
AppStream-9.6.0.Z.EUS:thunderbird-0:140.9.0-1.el9_6.aarch64
AppStream-9.6.0.Z.EUS:thunderbird-0:140.9.0-1.el9_6.ppc64le
AppStream-9.6.0.Z.EUS:thunderbird-0:140.9.0-1.el9_6.s390x
AppStream-9.6.0.Z.EUS:thunderbird-0:140.9.0-1.el9_6.src
AppStream-9.6.0.Z.EUS:thunderbird-0:140.9.0-1.el9_6.x86_64
AppStream-9.6.0.Z.EUS:thunderbird-debuginfo-0:140.9.0-1.el9_6.aarch64
AppStream-9.6.0.Z.EUS:thunderbird-debuginfo-0:140.9.0-1.el9_6.ppc64le
AppStream-9.6.0.Z.EUS:thunderbird-debuginfo-0:140.9.0-1.el9_6.s390x
AppStream-9.6.0.Z.EUS:thunderbird-debuginfo-0:140.9.0-1.el9_6.x86_64
AppStream-9.6.0.Z.EUS:thunderbird-debugsource-0:140.9.0-1.el9_6.aarch64
AppStream-9.6.0.Z.EUS:thunderbird-debugsource-0:140.9.0-1.el9_6.ppc64le
AppStream-9.6.0.Z.EUS:thunderbird-debugsource-0:140.9.0-1.el9_6.s390x
AppStream-9.6.0.Z.EUS:thunderbird-debugsource-0:140.9.0-1.el9_6.x86_64
Threats
Impact
Moderate
A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: Incorrect boundary conditions in the Audio/Video: GMP component
6.1 (Medium)
Vendor Fix
For details on how to apply this update, which includes the changes described in this advisory, refer to:
https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2026:8284
Product status
Fixed
AppStream-9.6.0.Z.EUS:thunderbird-0:140.9.0-1.el9_6.aarch64
AppStream-9.6.0.Z.EUS:thunderbird-0:140.9.0-1.el9_6.ppc64le
AppStream-9.6.0.Z.EUS:thunderbird-0:140.9.0-1.el9_6.s390x
AppStream-9.6.0.Z.EUS:thunderbird-0:140.9.0-1.el9_6.src
AppStream-9.6.0.Z.EUS:thunderbird-0:140.9.0-1.el9_6.x86_64
AppStream-9.6.0.Z.EUS:thunderbird-debuginfo-0:140.9.0-1.el9_6.aarch64
AppStream-9.6.0.Z.EUS:thunderbird-debuginfo-0:140.9.0-1.el9_6.ppc64le
AppStream-9.6.0.Z.EUS:thunderbird-debuginfo-0:140.9.0-1.el9_6.s390x
AppStream-9.6.0.Z.EUS:thunderbird-debuginfo-0:140.9.0-1.el9_6.x86_64
AppStream-9.6.0.Z.EUS:thunderbird-debugsource-0:140.9.0-1.el9_6.aarch64
AppStream-9.6.0.Z.EUS:thunderbird-debugsource-0:140.9.0-1.el9_6.ppc64le
AppStream-9.6.0.Z.EUS:thunderbird-debugsource-0:140.9.0-1.el9_6.s390x
AppStream-9.6.0.Z.EUS:thunderbird-debugsource-0:140.9.0-1.el9_6.x86_64
Threats
Impact
Moderate
A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: Incorrect boundary conditions in the Audio/Video component
6.1 (Medium)
Vendor Fix
For details on how to apply this update, which includes the changes described in this advisory, refer to:
https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2026:8284
Product status
Fixed
AppStream-9.6.0.Z.EUS:thunderbird-0:140.9.0-1.el9_6.aarch64
AppStream-9.6.0.Z.EUS:thunderbird-0:140.9.0-1.el9_6.ppc64le
AppStream-9.6.0.Z.EUS:thunderbird-0:140.9.0-1.el9_6.s390x
AppStream-9.6.0.Z.EUS:thunderbird-0:140.9.0-1.el9_6.src
AppStream-9.6.0.Z.EUS:thunderbird-0:140.9.0-1.el9_6.x86_64
AppStream-9.6.0.Z.EUS:thunderbird-debuginfo-0:140.9.0-1.el9_6.aarch64
AppStream-9.6.0.Z.EUS:thunderbird-debuginfo-0:140.9.0-1.el9_6.ppc64le
AppStream-9.6.0.Z.EUS:thunderbird-debuginfo-0:140.9.0-1.el9_6.s390x
AppStream-9.6.0.Z.EUS:thunderbird-debuginfo-0:140.9.0-1.el9_6.x86_64
AppStream-9.6.0.Z.EUS:thunderbird-debugsource-0:140.9.0-1.el9_6.aarch64
AppStream-9.6.0.Z.EUS:thunderbird-debugsource-0:140.9.0-1.el9_6.ppc64le
AppStream-9.6.0.Z.EUS:thunderbird-debugsource-0:140.9.0-1.el9_6.s390x
AppStream-9.6.0.Z.EUS:thunderbird-debugsource-0:140.9.0-1.el9_6.x86_64
Threats
Impact
Moderate
A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: Use-after-free in the Widget: Cocoa component
6.1 (Medium)
Vendor Fix
For details on how to apply this update, which includes the changes described in this advisory, refer to:
https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2026:8284
Product status
Fixed
AppStream-9.6.0.Z.EUS:thunderbird-0:140.9.0-1.el9_6.aarch64
AppStream-9.6.0.Z.EUS:thunderbird-0:140.9.0-1.el9_6.ppc64le
AppStream-9.6.0.Z.EUS:thunderbird-0:140.9.0-1.el9_6.s390x
AppStream-9.6.0.Z.EUS:thunderbird-0:140.9.0-1.el9_6.src
AppStream-9.6.0.Z.EUS:thunderbird-0:140.9.0-1.el9_6.x86_64
AppStream-9.6.0.Z.EUS:thunderbird-debuginfo-0:140.9.0-1.el9_6.aarch64
AppStream-9.6.0.Z.EUS:thunderbird-debuginfo-0:140.9.0-1.el9_6.ppc64le
AppStream-9.6.0.Z.EUS:thunderbird-debuginfo-0:140.9.0-1.el9_6.s390x
AppStream-9.6.0.Z.EUS:thunderbird-debuginfo-0:140.9.0-1.el9_6.x86_64
AppStream-9.6.0.Z.EUS:thunderbird-debugsource-0:140.9.0-1.el9_6.aarch64
AppStream-9.6.0.Z.EUS:thunderbird-debugsource-0:140.9.0-1.el9_6.ppc64le
AppStream-9.6.0.Z.EUS:thunderbird-debugsource-0:140.9.0-1.el9_6.s390x
AppStream-9.6.0.Z.EUS:thunderbird-debugsource-0:140.9.0-1.el9_6.x86_64
Threats
Impact
Moderate
A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: Information disclosure in the Widget: Cocoa component
6.5 (Medium)
Vendor Fix
For details on how to apply this update, which includes the changes described in this advisory, refer to:
https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2026:8284
Product status
Fixed
AppStream-9.6.0.Z.EUS:thunderbird-0:140.9.0-1.el9_6.aarch64
AppStream-9.6.0.Z.EUS:thunderbird-0:140.9.0-1.el9_6.ppc64le
AppStream-9.6.0.Z.EUS:thunderbird-0:140.9.0-1.el9_6.s390x
AppStream-9.6.0.Z.EUS:thunderbird-0:140.9.0-1.el9_6.src
AppStream-9.6.0.Z.EUS:thunderbird-0:140.9.0-1.el9_6.x86_64
AppStream-9.6.0.Z.EUS:thunderbird-debuginfo-0:140.9.0-1.el9_6.aarch64
AppStream-9.6.0.Z.EUS:thunderbird-debuginfo-0:140.9.0-1.el9_6.ppc64le
AppStream-9.6.0.Z.EUS:thunderbird-debuginfo-0:140.9.0-1.el9_6.s390x
AppStream-9.6.0.Z.EUS:thunderbird-debuginfo-0:140.9.0-1.el9_6.x86_64
AppStream-9.6.0.Z.EUS:thunderbird-debugsource-0:140.9.0-1.el9_6.aarch64
AppStream-9.6.0.Z.EUS:thunderbird-debugsource-0:140.9.0-1.el9_6.ppc64le
AppStream-9.6.0.Z.EUS:thunderbird-debugsource-0:140.9.0-1.el9_6.s390x
AppStream-9.6.0.Z.EUS:thunderbird-debugsource-0:140.9.0-1.el9_6.x86_64
Threats
Impact
Moderate
A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: Incorrect boundary conditions in the Graphics component
6.1 (Medium)
Vendor Fix
For details on how to apply this update, which includes the changes described in this advisory, refer to:
https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2026:8284
Product status
Fixed
AppStream-9.6.0.Z.EUS:thunderbird-0:140.9.0-1.el9_6.aarch64
AppStream-9.6.0.Z.EUS:thunderbird-0:140.9.0-1.el9_6.ppc64le
AppStream-9.6.0.Z.EUS:thunderbird-0:140.9.0-1.el9_6.s390x
AppStream-9.6.0.Z.EUS:thunderbird-0:140.9.0-1.el9_6.src
AppStream-9.6.0.Z.EUS:thunderbird-0:140.9.0-1.el9_6.x86_64
AppStream-9.6.0.Z.EUS:thunderbird-debuginfo-0:140.9.0-1.el9_6.aarch64
AppStream-9.6.0.Z.EUS:thunderbird-debuginfo-0:140.9.0-1.el9_6.ppc64le
AppStream-9.6.0.Z.EUS:thunderbird-debuginfo-0:140.9.0-1.el9_6.s390x
AppStream-9.6.0.Z.EUS:thunderbird-debuginfo-0:140.9.0-1.el9_6.x86_64
AppStream-9.6.0.Z.EUS:thunderbird-debugsource-0:140.9.0-1.el9_6.aarch64
AppStream-9.6.0.Z.EUS:thunderbird-debugsource-0:140.9.0-1.el9_6.ppc64le
AppStream-9.6.0.Z.EUS:thunderbird-debugsource-0:140.9.0-1.el9_6.s390x
AppStream-9.6.0.Z.EUS:thunderbird-debugsource-0:140.9.0-1.el9_6.x86_64
Threats
Impact
Moderate
A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: Incorrect boundary conditions in the Audio/Video component
6.5 (Medium)
Vendor Fix
For details on how to apply this update, which includes the changes described in this advisory, refer to:
https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2026:8284
Product status
Fixed
AppStream-9.6.0.Z.EUS:thunderbird-0:140.9.0-1.el9_6.aarch64
AppStream-9.6.0.Z.EUS:thunderbird-0:140.9.0-1.el9_6.ppc64le
AppStream-9.6.0.Z.EUS:thunderbird-0:140.9.0-1.el9_6.s390x
AppStream-9.6.0.Z.EUS:thunderbird-0:140.9.0-1.el9_6.src
AppStream-9.6.0.Z.EUS:thunderbird-0:140.9.0-1.el9_6.x86_64
AppStream-9.6.0.Z.EUS:thunderbird-debuginfo-0:140.9.0-1.el9_6.aarch64
AppStream-9.6.0.Z.EUS:thunderbird-debuginfo-0:140.9.0-1.el9_6.ppc64le
AppStream-9.6.0.Z.EUS:thunderbird-debuginfo-0:140.9.0-1.el9_6.s390x
AppStream-9.6.0.Z.EUS:thunderbird-debuginfo-0:140.9.0-1.el9_6.x86_64
AppStream-9.6.0.Z.EUS:thunderbird-debugsource-0:140.9.0-1.el9_6.aarch64
AppStream-9.6.0.Z.EUS:thunderbird-debugsource-0:140.9.0-1.el9_6.ppc64le
AppStream-9.6.0.Z.EUS:thunderbird-debugsource-0:140.9.0-1.el9_6.s390x
AppStream-9.6.0.Z.EUS:thunderbird-debugsource-0:140.9.0-1.el9_6.x86_64
Threats
Impact
Moderate
A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: Uninitialized memory in the Graphics: Canvas2D component
6.5 (Medium)
Vendor Fix
For details on how to apply this update, which includes the changes described in this advisory, refer to:
https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2026:8284
Product status
Fixed
AppStream-9.6.0.Z.EUS:thunderbird-0:140.9.0-1.el9_6.aarch64
AppStream-9.6.0.Z.EUS:thunderbird-0:140.9.0-1.el9_6.ppc64le
AppStream-9.6.0.Z.EUS:thunderbird-0:140.9.0-1.el9_6.s390x
AppStream-9.6.0.Z.EUS:thunderbird-0:140.9.0-1.el9_6.src
AppStream-9.6.0.Z.EUS:thunderbird-0:140.9.0-1.el9_6.x86_64
AppStream-9.6.0.Z.EUS:thunderbird-debuginfo-0:140.9.0-1.el9_6.aarch64
AppStream-9.6.0.Z.EUS:thunderbird-debuginfo-0:140.9.0-1.el9_6.ppc64le
AppStream-9.6.0.Z.EUS:thunderbird-debuginfo-0:140.9.0-1.el9_6.s390x
AppStream-9.6.0.Z.EUS:thunderbird-debuginfo-0:140.9.0-1.el9_6.x86_64
AppStream-9.6.0.Z.EUS:thunderbird-debugsource-0:140.9.0-1.el9_6.aarch64
AppStream-9.6.0.Z.EUS:thunderbird-debugsource-0:140.9.0-1.el9_6.ppc64le
AppStream-9.6.0.Z.EUS:thunderbird-debugsource-0:140.9.0-1.el9_6.s390x
AppStream-9.6.0.Z.EUS:thunderbird-debugsource-0:140.9.0-1.el9_6.x86_64
Threats
Impact
Moderate
A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: Incorrect boundary conditions, uninitialized memory in the JavaScript Engine component
6.1 (Medium)
Vendor Fix
For details on how to apply this update, which includes the changes described in this advisory, refer to:
https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2026:8284
Product status
Fixed
AppStream-9.6.0.Z.EUS:thunderbird-0:140.9.0-1.el9_6.aarch64
AppStream-9.6.0.Z.EUS:thunderbird-0:140.9.0-1.el9_6.ppc64le
AppStream-9.6.0.Z.EUS:thunderbird-0:140.9.0-1.el9_6.s390x
AppStream-9.6.0.Z.EUS:thunderbird-0:140.9.0-1.el9_6.src
AppStream-9.6.0.Z.EUS:thunderbird-0:140.9.0-1.el9_6.x86_64
AppStream-9.6.0.Z.EUS:thunderbird-debuginfo-0:140.9.0-1.el9_6.aarch64
AppStream-9.6.0.Z.EUS:thunderbird-debuginfo-0:140.9.0-1.el9_6.ppc64le
AppStream-9.6.0.Z.EUS:thunderbird-debuginfo-0:140.9.0-1.el9_6.s390x
AppStream-9.6.0.Z.EUS:thunderbird-debuginfo-0:140.9.0-1.el9_6.x86_64
AppStream-9.6.0.Z.EUS:thunderbird-debugsource-0:140.9.0-1.el9_6.aarch64
AppStream-9.6.0.Z.EUS:thunderbird-debugsource-0:140.9.0-1.el9_6.ppc64le
AppStream-9.6.0.Z.EUS:thunderbird-debugsource-0:140.9.0-1.el9_6.s390x
AppStream-9.6.0.Z.EUS:thunderbird-debugsource-0:140.9.0-1.el9_6.x86_64
Threats
Impact
Moderate
A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: Privilege escalation in the Netmonitor component
6.1 (Medium)
Vendor Fix
For details on how to apply this update, which includes the changes described in this advisory, refer to:
https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2026:8284
Product status
Fixed
AppStream-9.6.0.Z.EUS:thunderbird-0:140.9.0-1.el9_6.aarch64
AppStream-9.6.0.Z.EUS:thunderbird-0:140.9.0-1.el9_6.ppc64le
AppStream-9.6.0.Z.EUS:thunderbird-0:140.9.0-1.el9_6.s390x
AppStream-9.6.0.Z.EUS:thunderbird-0:140.9.0-1.el9_6.src
AppStream-9.6.0.Z.EUS:thunderbird-0:140.9.0-1.el9_6.x86_64
AppStream-9.6.0.Z.EUS:thunderbird-debuginfo-0:140.9.0-1.el9_6.aarch64
AppStream-9.6.0.Z.EUS:thunderbird-debuginfo-0:140.9.0-1.el9_6.ppc64le
AppStream-9.6.0.Z.EUS:thunderbird-debuginfo-0:140.9.0-1.el9_6.s390x
AppStream-9.6.0.Z.EUS:thunderbird-debuginfo-0:140.9.0-1.el9_6.x86_64
AppStream-9.6.0.Z.EUS:thunderbird-debugsource-0:140.9.0-1.el9_6.aarch64
AppStream-9.6.0.Z.EUS:thunderbird-debugsource-0:140.9.0-1.el9_6.ppc64le
AppStream-9.6.0.Z.EUS:thunderbird-debugsource-0:140.9.0-1.el9_6.s390x
AppStream-9.6.0.Z.EUS:thunderbird-debugsource-0:140.9.0-1.el9_6.x86_64
Threats
Impact
Moderate
A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: Undefined behavior in the WebRTC: Signaling component
CWE-475 - Undefined Behavior for Input to API
Vendor Fix
For details on how to apply this update, which includes the changes described in this advisory, refer to:
https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2026:8284
Product status
Fixed
AppStream-9.6.0.Z.EUS:thunderbird-0:140.9.0-1.el9_6.aarch64
AppStream-9.6.0.Z.EUS:thunderbird-0:140.9.0-1.el9_6.ppc64le
AppStream-9.6.0.Z.EUS:thunderbird-0:140.9.0-1.el9_6.s390x
AppStream-9.6.0.Z.EUS:thunderbird-0:140.9.0-1.el9_6.src
AppStream-9.6.0.Z.EUS:thunderbird-0:140.9.0-1.el9_6.x86_64
AppStream-9.6.0.Z.EUS:thunderbird-debuginfo-0:140.9.0-1.el9_6.aarch64
AppStream-9.6.0.Z.EUS:thunderbird-debuginfo-0:140.9.0-1.el9_6.ppc64le
AppStream-9.6.0.Z.EUS:thunderbird-debuginfo-0:140.9.0-1.el9_6.s390x
AppStream-9.6.0.Z.EUS:thunderbird-debuginfo-0:140.9.0-1.el9_6.x86_64
AppStream-9.6.0.Z.EUS:thunderbird-debugsource-0:140.9.0-1.el9_6.aarch64
AppStream-9.6.0.Z.EUS:thunderbird-debugsource-0:140.9.0-1.el9_6.ppc64le
AppStream-9.6.0.Z.EUS:thunderbird-debugsource-0:140.9.0-1.el9_6.s390x
AppStream-9.6.0.Z.EUS:thunderbird-debugsource-0:140.9.0-1.el9_6.x86_64
Threats
Impact
Low
A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: Incorrect boundary conditions in the Graphics: Text component
CWE-805 - Buffer Access with Incorrect Length Value
Vendor Fix
For details on how to apply this update, which includes the changes described in this advisory, refer to:
https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2026:8284
Product status
Fixed
AppStream-9.6.0.Z.EUS:thunderbird-0:140.9.0-1.el9_6.aarch64
AppStream-9.6.0.Z.EUS:thunderbird-0:140.9.0-1.el9_6.ppc64le
AppStream-9.6.0.Z.EUS:thunderbird-0:140.9.0-1.el9_6.s390x
AppStream-9.6.0.Z.EUS:thunderbird-0:140.9.0-1.el9_6.src
AppStream-9.6.0.Z.EUS:thunderbird-0:140.9.0-1.el9_6.x86_64
AppStream-9.6.0.Z.EUS:thunderbird-debuginfo-0:140.9.0-1.el9_6.aarch64
AppStream-9.6.0.Z.EUS:thunderbird-debuginfo-0:140.9.0-1.el9_6.ppc64le
AppStream-9.6.0.Z.EUS:thunderbird-debuginfo-0:140.9.0-1.el9_6.s390x
AppStream-9.6.0.Z.EUS:thunderbird-debuginfo-0:140.9.0-1.el9_6.x86_64
AppStream-9.6.0.Z.EUS:thunderbird-debugsource-0:140.9.0-1.el9_6.aarch64
AppStream-9.6.0.Z.EUS:thunderbird-debugsource-0:140.9.0-1.el9_6.ppc64le
AppStream-9.6.0.Z.EUS:thunderbird-debugsource-0:140.9.0-1.el9_6.s390x
AppStream-9.6.0.Z.EUS:thunderbird-debugsource-0:140.9.0-1.el9_6.x86_64
Threats
Impact
Low
A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: Memory safety bugs present in Firefox ESR 140.8, Thunderbird ESR 140.8, Firefox 148 and Thunderbird 148. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code.
7.5 (High)
Vendor Fix
For details on how to apply this update, which includes the changes described in this advisory, refer to:
https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2026:8284
Product status
Fixed
AppStream-9.6.0.Z.EUS:thunderbird-0:140.9.0-1.el9_6.aarch64
AppStream-9.6.0.Z.EUS:thunderbird-0:140.9.0-1.el9_6.ppc64le
AppStream-9.6.0.Z.EUS:thunderbird-0:140.9.0-1.el9_6.s390x
AppStream-9.6.0.Z.EUS:thunderbird-0:140.9.0-1.el9_6.src
AppStream-9.6.0.Z.EUS:thunderbird-0:140.9.0-1.el9_6.x86_64
AppStream-9.6.0.Z.EUS:thunderbird-debuginfo-0:140.9.0-1.el9_6.aarch64
AppStream-9.6.0.Z.EUS:thunderbird-debuginfo-0:140.9.0-1.el9_6.ppc64le
AppStream-9.6.0.Z.EUS:thunderbird-debuginfo-0:140.9.0-1.el9_6.s390x
AppStream-9.6.0.Z.EUS:thunderbird-debuginfo-0:140.9.0-1.el9_6.x86_64
AppStream-9.6.0.Z.EUS:thunderbird-debugsource-0:140.9.0-1.el9_6.aarch64
AppStream-9.6.0.Z.EUS:thunderbird-debugsource-0:140.9.0-1.el9_6.ppc64le
AppStream-9.6.0.Z.EUS:thunderbird-debugsource-0:140.9.0-1.el9_6.s390x
AppStream-9.6.0.Z.EUS:thunderbird-debugsource-0:140.9.0-1.el9_6.x86_64
Threats
Impact
Important
A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: Memory safety bugs present in Firefox ESR 115.33, Firefox ESR 140.8, Thunderbird ESR 140.8, Firefox 148 and Thunderbird 148. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code.
7.5 (High)
Vendor Fix
For details on how to apply this update, which includes the changes described in this advisory, refer to:
https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2026:8284
Product status
Fixed
AppStream-9.6.0.Z.EUS:thunderbird-0:140.9.0-1.el9_6.aarch64
AppStream-9.6.0.Z.EUS:thunderbird-0:140.9.0-1.el9_6.ppc64le
AppStream-9.6.0.Z.EUS:thunderbird-0:140.9.0-1.el9_6.s390x
AppStream-9.6.0.Z.EUS:thunderbird-0:140.9.0-1.el9_6.src
AppStream-9.6.0.Z.EUS:thunderbird-0:140.9.0-1.el9_6.x86_64
AppStream-9.6.0.Z.EUS:thunderbird-debuginfo-0:140.9.0-1.el9_6.aarch64
AppStream-9.6.0.Z.EUS:thunderbird-debuginfo-0:140.9.0-1.el9_6.ppc64le
AppStream-9.6.0.Z.EUS:thunderbird-debuginfo-0:140.9.0-1.el9_6.s390x
AppStream-9.6.0.Z.EUS:thunderbird-debuginfo-0:140.9.0-1.el9_6.x86_64
AppStream-9.6.0.Z.EUS:thunderbird-debugsource-0:140.9.0-1.el9_6.aarch64
AppStream-9.6.0.Z.EUS:thunderbird-debugsource-0:140.9.0-1.el9_6.ppc64le
AppStream-9.6.0.Z.EUS:thunderbird-debugsource-0:140.9.0-1.el9_6.s390x
AppStream-9.6.0.Z.EUS:thunderbird-debugsource-0:140.9.0-1.el9_6.x86_64
Threats
Impact
Important
References
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{
"document": {
"aggregate_severity": {
"namespace": "https://access.redhat.com/security/updates/classification/",
"text": "Important"
},
"category": "csaf_security_advisory",
"csaf_version": "2.0",
"distribution": {
"text": "Copyright \u00a9 Red Hat, Inc. All rights reserved.",
"tlp": {
"label": "WHITE",
"url": "https://www.first.org/tlp/"
}
},
"lang": "en",
"notes": [
{
"category": "summary",
"text": "An update for thunderbird is now available for Red Hat Enterprise Linux 9.6 Extended Update Support.\n\nRed Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.",
"title": "Topic"
},
{
"category": "general",
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{
"category": "general",
"text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
"title": "CVSS score applicability"
}
],
"product_status": {
"fixed": [
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]
},
"references": [
{
"category": "self",
"summary": "Canonical URL",
"url": "https://access.redhat.com/security/cve/CVE-2026-4721"
},
{
"category": "external",
"summary": "RHBZ#2450711",
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2450711"
},
{
"category": "external",
"summary": "https://www.cve.org/CVERecord?id=CVE-2026-4721",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-4721"
},
{
"category": "external",
"summary": "https://nvd.nist.gov/vuln/detail/CVE-2026-4721",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-4721"
},
{
"category": "external",
"summary": "https://www.mozilla.org/security/advisories/mfsa2026-22/#CVE-2026-4721",
"url": "https://www.mozilla.org/security/advisories/mfsa2026-22/#CVE-2026-4721"
},
{
"category": "external",
"summary": "https://www.mozilla.org/security/advisories/mfsa2026-24/#CVE-2026-4721",
"url": "https://www.mozilla.org/security/advisories/mfsa2026-24/#CVE-2026-4721"
}
],
"release_date": "2026-03-24T12:30:44.312000+00:00",
"remediations": [
{
"category": "vendor_fix",
"date": "2026-04-15T10:54:21+00:00",
"details": "For details on how to apply this update, which includes the changes described in this advisory, refer to:\n\nhttps://access.redhat.com/articles/11258",
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],
"restart_required": {
"category": "none"
},
"url": "https://access.redhat.com/errata/RHSA-2026:8284"
}
],
"scores": [
{
"cvss_v3": {
"attackComplexity": "HIGH",
"attackVector": "NETWORK",
"availabilityImpact": "HIGH",
"baseScore": 7.5,
"baseSeverity": "HIGH",
"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "REQUIRED",
"vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H",
"version": "3.1"
},
"products": [
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]
}
],
"threats": [
{
"category": "impact",
"details": "Important"
}
],
"title": "firefox: thunderbird: Memory safety bugs fixed in Firefox ESR 115.34, Firefox ESR 140.9, Thunderbird ESR 140.9, Firefox 149 and Thunderbird 149"
}
]
}
RHSA-2026:7845
Vulnerability from csaf_redhat - Published: 2026-04-13 10:52 - Updated: 2026-04-28 18:40Summary
Red Hat Security Advisory: firefox security update
Severity
Important
Notes
Topic: An update for firefox is now available for Red Hat Enterprise Linux 9.4 Extended Update Support.
Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.
Details: Mozilla Firefox is an open-source web browser, designed for standards compliance, performance, and portability.
Security Fix(es):
* firefox: thunderbird: Use-after-free in the JavaScript Engine component (CVE-2026-4701)
* firefox: thunderbird: Memory safety bugs fixed in Firefox ESR 115.34, Firefox ESR 140.9, Thunderbird ESR 140.9, Firefox 149 and Thunderbird 149 (CVE-2026-4721)
* firefox: thunderbird: Privilege escalation in the Netmonitor component (CVE-2026-4717)
* firefox: thunderbird: Sandbox escape due to use-after-free in the Disability Access APIs component (CVE-2026-4688)
* firefox: thunderbird: Incorrect boundary conditions in the Graphics: Canvas2D component (CVE-2026-4706)
* firefox: thunderbird: Incorrect boundary conditions in the Audio/Video: Web Codecs component (CVE-2026-4695)
* firefox: thunderbird: Sandbox escape due to incorrect boundary conditions, integer overflow in the XPCOM component (CVE-2026-4689)
* firefox: thunderbird: JIT miscompilation in the JavaScript Engine: JIT component (CVE-2026-4698)
* firefox: thunderbird: Incorrect boundary conditions, uninitialized memory in the JavaScript Engine component (CVE-2026-4716)
* firefox: thunderbird: Race condition, use-after-free in the Graphics: WebRender component (CVE-2026-4684)
* firefox: thunderbird: Undefined behavior in the WebRTC: Signaling component (CVE-2026-4705)
* firefox: thunderbird: Uninitialized memory in the Graphics: Canvas2D component (CVE-2026-4715)
* firefox: thunderbird: Incorrect boundary conditions in the Graphics: Canvas2D component (CVE-2026-4685)
* firefox: thunderbird: Incorrect boundary conditions in the Audio/Video component (CVE-2026-4714)
* firefox: thunderbird: Incorrect boundary conditions in the Audio/Video: GMP component (CVE-2026-4709)
* firefox: thunderbird: Incorrect boundary conditions in the Audio/Video component (CVE-2026-4710)
* firefox: thunderbird: Information disclosure in the Widget: Cocoa component (CVE-2026-4712)
* firefox: thunderbird: Incorrect boundary conditions in the Audio/Video: Web Codecs component (CVE-2026-4697)
* firefox: thunderbird: Incorrect boundary conditions in the Graphics component (CVE-2026-4713)
* firefox: thunderbird: Sandbox escape due to incorrect boundary conditions, integer overflow in the XPCOM component (CVE-2026-4690)
* firefox: thunderbird: Use-after-free in the Widget: Cocoa component (CVE-2026-4711)
* firefox: thunderbird: Incorrect boundary conditions in the Graphics: Canvas2D component (CVE-2026-4686)
* firefox: thunderbird: Incorrect boundary conditions in the Graphics component (CVE-2026-4708)
* firefox: thunderbird: Use-after-free in the CSS Parsing and Computation component (CVE-2026-4691)
* firefox: thunderbird: Incorrect boundary conditions in the Layout: Text and Fonts component (CVE-2026-4699)
* firefox: thunderbird: Use-after-free in the Layout: Text and Fonts component (CVE-2026-4696)
* firefox: thunderbird: Incorrect boundary conditions in the Audio/Video: Playback component (CVE-2026-4693)
* firefox: thunderbird: Undefined behavior in the WebRTC: Signaling component (CVE-2026-4718)
* firefox: thunderbird: JIT miscompilation in the JavaScript Engine component (CVE-2026-4702)
* firefox: thunderbird: Incorrect boundary conditions in the Graphics: Text component (CVE-2026-4719)
* firefox: thunderbird: Incorrect boundary conditions, integer overflow in the Graphics component (CVE-2026-4694)
* firefox: thunderbird: Sandbox escape in the Responsive Design Mode component (CVE-2026-4692)
* firefox: thunderbird: Memory safety bugs fixed in Firefox ESR 140.9, Thunderbird ESR 140.9, Firefox 149 and Thunderbird 149 (CVE-2026-4720)
* firefox: thunderbird: Mitigation bypass in the Networking: HTTP component (CVE-2026-4700)
* firefox: thunderbird: Incorrect boundary conditions in the Graphics: Canvas2D component (CVE-2026-4707)
* firefox: thunderbird: Denial-of-service in the WebRTC: Signaling component (CVE-2026-4704)
* firefox: thunderbird: Sandbox escape due to incorrect boundary conditions in the Telemetry component (CVE-2026-4687)
For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.
Terms of Use: This content is licensed under the Creative Commons Attribution 4.0 International License (https://creativecommons.org/licenses/by/4.0/). If you distribute this content, or a modified version of it, you must provide attribution to Red Hat Inc. and provide a link to the original.
A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: Race condition, use-after-free in the Graphics: WebRender component
7.5 (High)
Vendor Fix
For details on how to apply this update, which includes the changes described in this advisory, refer to:
https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2026:7845
Product status
Fixed
AppStream-9.4.0.Z.EUS:firefox-0:140.9.0-1.el9_4.aarch64
AppStream-9.4.0.Z.EUS:firefox-0:140.9.0-1.el9_4.ppc64le
AppStream-9.4.0.Z.EUS:firefox-0:140.9.0-1.el9_4.s390x
AppStream-9.4.0.Z.EUS:firefox-0:140.9.0-1.el9_4.src
AppStream-9.4.0.Z.EUS:firefox-0:140.9.0-1.el9_4.x86_64
AppStream-9.4.0.Z.EUS:firefox-debuginfo-0:140.9.0-1.el9_4.aarch64
AppStream-9.4.0.Z.EUS:firefox-debuginfo-0:140.9.0-1.el9_4.ppc64le
AppStream-9.4.0.Z.EUS:firefox-debuginfo-0:140.9.0-1.el9_4.s390x
AppStream-9.4.0.Z.EUS:firefox-debuginfo-0:140.9.0-1.el9_4.x86_64
AppStream-9.4.0.Z.EUS:firefox-debugsource-0:140.9.0-1.el9_4.aarch64
AppStream-9.4.0.Z.EUS:firefox-debugsource-0:140.9.0-1.el9_4.ppc64le
AppStream-9.4.0.Z.EUS:firefox-debugsource-0:140.9.0-1.el9_4.s390x
AppStream-9.4.0.Z.EUS:firefox-debugsource-0:140.9.0-1.el9_4.x86_64
AppStream-9.4.0.Z.EUS:firefox-x11-0:140.9.0-1.el9_4.aarch64
AppStream-9.4.0.Z.EUS:firefox-x11-0:140.9.0-1.el9_4.ppc64le
AppStream-9.4.0.Z.EUS:firefox-x11-0:140.9.0-1.el9_4.s390x
AppStream-9.4.0.Z.EUS:firefox-x11-0:140.9.0-1.el9_4.x86_64
Threats
Impact
Important
A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: Incorrect boundary conditions in the Graphics: Canvas2D component
7.5 (High)
Vendor Fix
For details on how to apply this update, which includes the changes described in this advisory, refer to:
https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2026:7845
Product status
Fixed
AppStream-9.4.0.Z.EUS:firefox-0:140.9.0-1.el9_4.aarch64
AppStream-9.4.0.Z.EUS:firefox-0:140.9.0-1.el9_4.ppc64le
AppStream-9.4.0.Z.EUS:firefox-0:140.9.0-1.el9_4.s390x
AppStream-9.4.0.Z.EUS:firefox-0:140.9.0-1.el9_4.src
AppStream-9.4.0.Z.EUS:firefox-0:140.9.0-1.el9_4.x86_64
AppStream-9.4.0.Z.EUS:firefox-debuginfo-0:140.9.0-1.el9_4.aarch64
AppStream-9.4.0.Z.EUS:firefox-debuginfo-0:140.9.0-1.el9_4.ppc64le
AppStream-9.4.0.Z.EUS:firefox-debuginfo-0:140.9.0-1.el9_4.s390x
AppStream-9.4.0.Z.EUS:firefox-debuginfo-0:140.9.0-1.el9_4.x86_64
AppStream-9.4.0.Z.EUS:firefox-debugsource-0:140.9.0-1.el9_4.aarch64
AppStream-9.4.0.Z.EUS:firefox-debugsource-0:140.9.0-1.el9_4.ppc64le
AppStream-9.4.0.Z.EUS:firefox-debugsource-0:140.9.0-1.el9_4.s390x
AppStream-9.4.0.Z.EUS:firefox-debugsource-0:140.9.0-1.el9_4.x86_64
AppStream-9.4.0.Z.EUS:firefox-x11-0:140.9.0-1.el9_4.aarch64
AppStream-9.4.0.Z.EUS:firefox-x11-0:140.9.0-1.el9_4.ppc64le
AppStream-9.4.0.Z.EUS:firefox-x11-0:140.9.0-1.el9_4.s390x
AppStream-9.4.0.Z.EUS:firefox-x11-0:140.9.0-1.el9_4.x86_64
Threats
Impact
Important
A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: Incorrect boundary conditions in the Graphics: Canvas2D component
7.5 (High)
Vendor Fix
For details on how to apply this update, which includes the changes described in this advisory, refer to:
https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2026:7845
Product status
Fixed
AppStream-9.4.0.Z.EUS:firefox-0:140.9.0-1.el9_4.aarch64
AppStream-9.4.0.Z.EUS:firefox-0:140.9.0-1.el9_4.ppc64le
AppStream-9.4.0.Z.EUS:firefox-0:140.9.0-1.el9_4.s390x
AppStream-9.4.0.Z.EUS:firefox-0:140.9.0-1.el9_4.src
AppStream-9.4.0.Z.EUS:firefox-0:140.9.0-1.el9_4.x86_64
AppStream-9.4.0.Z.EUS:firefox-debuginfo-0:140.9.0-1.el9_4.aarch64
AppStream-9.4.0.Z.EUS:firefox-debuginfo-0:140.9.0-1.el9_4.ppc64le
AppStream-9.4.0.Z.EUS:firefox-debuginfo-0:140.9.0-1.el9_4.s390x
AppStream-9.4.0.Z.EUS:firefox-debuginfo-0:140.9.0-1.el9_4.x86_64
AppStream-9.4.0.Z.EUS:firefox-debugsource-0:140.9.0-1.el9_4.aarch64
AppStream-9.4.0.Z.EUS:firefox-debugsource-0:140.9.0-1.el9_4.ppc64le
AppStream-9.4.0.Z.EUS:firefox-debugsource-0:140.9.0-1.el9_4.s390x
AppStream-9.4.0.Z.EUS:firefox-debugsource-0:140.9.0-1.el9_4.x86_64
AppStream-9.4.0.Z.EUS:firefox-x11-0:140.9.0-1.el9_4.aarch64
AppStream-9.4.0.Z.EUS:firefox-x11-0:140.9.0-1.el9_4.ppc64le
AppStream-9.4.0.Z.EUS:firefox-x11-0:140.9.0-1.el9_4.s390x
AppStream-9.4.0.Z.EUS:firefox-x11-0:140.9.0-1.el9_4.x86_64
Threats
Impact
Important
A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: Sandbox escape due to incorrect boundary conditions in the Telemetry component
7.5 (High)
Vendor Fix
For details on how to apply this update, which includes the changes described in this advisory, refer to:
https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2026:7845
Product status
Fixed
AppStream-9.4.0.Z.EUS:firefox-0:140.9.0-1.el9_4.aarch64
AppStream-9.4.0.Z.EUS:firefox-0:140.9.0-1.el9_4.ppc64le
AppStream-9.4.0.Z.EUS:firefox-0:140.9.0-1.el9_4.s390x
AppStream-9.4.0.Z.EUS:firefox-0:140.9.0-1.el9_4.src
AppStream-9.4.0.Z.EUS:firefox-0:140.9.0-1.el9_4.x86_64
AppStream-9.4.0.Z.EUS:firefox-debuginfo-0:140.9.0-1.el9_4.aarch64
AppStream-9.4.0.Z.EUS:firefox-debuginfo-0:140.9.0-1.el9_4.ppc64le
AppStream-9.4.0.Z.EUS:firefox-debuginfo-0:140.9.0-1.el9_4.s390x
AppStream-9.4.0.Z.EUS:firefox-debuginfo-0:140.9.0-1.el9_4.x86_64
AppStream-9.4.0.Z.EUS:firefox-debugsource-0:140.9.0-1.el9_4.aarch64
AppStream-9.4.0.Z.EUS:firefox-debugsource-0:140.9.0-1.el9_4.ppc64le
AppStream-9.4.0.Z.EUS:firefox-debugsource-0:140.9.0-1.el9_4.s390x
AppStream-9.4.0.Z.EUS:firefox-debugsource-0:140.9.0-1.el9_4.x86_64
AppStream-9.4.0.Z.EUS:firefox-x11-0:140.9.0-1.el9_4.aarch64
AppStream-9.4.0.Z.EUS:firefox-x11-0:140.9.0-1.el9_4.ppc64le
AppStream-9.4.0.Z.EUS:firefox-x11-0:140.9.0-1.el9_4.s390x
AppStream-9.4.0.Z.EUS:firefox-x11-0:140.9.0-1.el9_4.x86_64
Threats
Impact
Important
A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: Sandbox escape due to use-after-free in the Disability Access APIs component
7.5 (High)
Vendor Fix
For details on how to apply this update, which includes the changes described in this advisory, refer to:
https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2026:7845
Product status
Fixed
AppStream-9.4.0.Z.EUS:firefox-0:140.9.0-1.el9_4.aarch64
AppStream-9.4.0.Z.EUS:firefox-0:140.9.0-1.el9_4.ppc64le
AppStream-9.4.0.Z.EUS:firefox-0:140.9.0-1.el9_4.s390x
AppStream-9.4.0.Z.EUS:firefox-0:140.9.0-1.el9_4.src
AppStream-9.4.0.Z.EUS:firefox-0:140.9.0-1.el9_4.x86_64
AppStream-9.4.0.Z.EUS:firefox-debuginfo-0:140.9.0-1.el9_4.aarch64
AppStream-9.4.0.Z.EUS:firefox-debuginfo-0:140.9.0-1.el9_4.ppc64le
AppStream-9.4.0.Z.EUS:firefox-debuginfo-0:140.9.0-1.el9_4.s390x
AppStream-9.4.0.Z.EUS:firefox-debuginfo-0:140.9.0-1.el9_4.x86_64
AppStream-9.4.0.Z.EUS:firefox-debugsource-0:140.9.0-1.el9_4.aarch64
AppStream-9.4.0.Z.EUS:firefox-debugsource-0:140.9.0-1.el9_4.ppc64le
AppStream-9.4.0.Z.EUS:firefox-debugsource-0:140.9.0-1.el9_4.s390x
AppStream-9.4.0.Z.EUS:firefox-debugsource-0:140.9.0-1.el9_4.x86_64
AppStream-9.4.0.Z.EUS:firefox-x11-0:140.9.0-1.el9_4.aarch64
AppStream-9.4.0.Z.EUS:firefox-x11-0:140.9.0-1.el9_4.ppc64le
AppStream-9.4.0.Z.EUS:firefox-x11-0:140.9.0-1.el9_4.s390x
AppStream-9.4.0.Z.EUS:firefox-x11-0:140.9.0-1.el9_4.x86_64
Threats
Impact
Important
A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: Sandbox escape due to incorrect boundary conditions, integer overflow in the XPCOM component
7.5 (High)
Vendor Fix
For details on how to apply this update, which includes the changes described in this advisory, refer to:
https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2026:7845
Product status
Fixed
AppStream-9.4.0.Z.EUS:firefox-0:140.9.0-1.el9_4.aarch64
AppStream-9.4.0.Z.EUS:firefox-0:140.9.0-1.el9_4.ppc64le
AppStream-9.4.0.Z.EUS:firefox-0:140.9.0-1.el9_4.s390x
AppStream-9.4.0.Z.EUS:firefox-0:140.9.0-1.el9_4.src
AppStream-9.4.0.Z.EUS:firefox-0:140.9.0-1.el9_4.x86_64
AppStream-9.4.0.Z.EUS:firefox-debuginfo-0:140.9.0-1.el9_4.aarch64
AppStream-9.4.0.Z.EUS:firefox-debuginfo-0:140.9.0-1.el9_4.ppc64le
AppStream-9.4.0.Z.EUS:firefox-debuginfo-0:140.9.0-1.el9_4.s390x
AppStream-9.4.0.Z.EUS:firefox-debuginfo-0:140.9.0-1.el9_4.x86_64
AppStream-9.4.0.Z.EUS:firefox-debugsource-0:140.9.0-1.el9_4.aarch64
AppStream-9.4.0.Z.EUS:firefox-debugsource-0:140.9.0-1.el9_4.ppc64le
AppStream-9.4.0.Z.EUS:firefox-debugsource-0:140.9.0-1.el9_4.s390x
AppStream-9.4.0.Z.EUS:firefox-debugsource-0:140.9.0-1.el9_4.x86_64
AppStream-9.4.0.Z.EUS:firefox-x11-0:140.9.0-1.el9_4.aarch64
AppStream-9.4.0.Z.EUS:firefox-x11-0:140.9.0-1.el9_4.ppc64le
AppStream-9.4.0.Z.EUS:firefox-x11-0:140.9.0-1.el9_4.s390x
AppStream-9.4.0.Z.EUS:firefox-x11-0:140.9.0-1.el9_4.x86_64
Threats
Impact
Important
A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: Sandbox escape due to incorrect boundary conditions, integer overflow in the XPCOM component
7.5 (High)
Vendor Fix
For details on how to apply this update, which includes the changes described in this advisory, refer to:
https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2026:7845
Product status
Fixed
AppStream-9.4.0.Z.EUS:firefox-0:140.9.0-1.el9_4.aarch64
AppStream-9.4.0.Z.EUS:firefox-0:140.9.0-1.el9_4.ppc64le
AppStream-9.4.0.Z.EUS:firefox-0:140.9.0-1.el9_4.s390x
AppStream-9.4.0.Z.EUS:firefox-0:140.9.0-1.el9_4.src
AppStream-9.4.0.Z.EUS:firefox-0:140.9.0-1.el9_4.x86_64
AppStream-9.4.0.Z.EUS:firefox-debuginfo-0:140.9.0-1.el9_4.aarch64
AppStream-9.4.0.Z.EUS:firefox-debuginfo-0:140.9.0-1.el9_4.ppc64le
AppStream-9.4.0.Z.EUS:firefox-debuginfo-0:140.9.0-1.el9_4.s390x
AppStream-9.4.0.Z.EUS:firefox-debuginfo-0:140.9.0-1.el9_4.x86_64
AppStream-9.4.0.Z.EUS:firefox-debugsource-0:140.9.0-1.el9_4.aarch64
AppStream-9.4.0.Z.EUS:firefox-debugsource-0:140.9.0-1.el9_4.ppc64le
AppStream-9.4.0.Z.EUS:firefox-debugsource-0:140.9.0-1.el9_4.s390x
AppStream-9.4.0.Z.EUS:firefox-debugsource-0:140.9.0-1.el9_4.x86_64
AppStream-9.4.0.Z.EUS:firefox-x11-0:140.9.0-1.el9_4.aarch64
AppStream-9.4.0.Z.EUS:firefox-x11-0:140.9.0-1.el9_4.ppc64le
AppStream-9.4.0.Z.EUS:firefox-x11-0:140.9.0-1.el9_4.s390x
AppStream-9.4.0.Z.EUS:firefox-x11-0:140.9.0-1.el9_4.x86_64
Threats
Impact
Important
A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: Use-after-free in the CSS Parsing and Computation component
7.5 (High)
Vendor Fix
For details on how to apply this update, which includes the changes described in this advisory, refer to:
https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2026:7845
Product status
Fixed
AppStream-9.4.0.Z.EUS:firefox-0:140.9.0-1.el9_4.aarch64
AppStream-9.4.0.Z.EUS:firefox-0:140.9.0-1.el9_4.ppc64le
AppStream-9.4.0.Z.EUS:firefox-0:140.9.0-1.el9_4.s390x
AppStream-9.4.0.Z.EUS:firefox-0:140.9.0-1.el9_4.src
AppStream-9.4.0.Z.EUS:firefox-0:140.9.0-1.el9_4.x86_64
AppStream-9.4.0.Z.EUS:firefox-debuginfo-0:140.9.0-1.el9_4.aarch64
AppStream-9.4.0.Z.EUS:firefox-debuginfo-0:140.9.0-1.el9_4.ppc64le
AppStream-9.4.0.Z.EUS:firefox-debuginfo-0:140.9.0-1.el9_4.s390x
AppStream-9.4.0.Z.EUS:firefox-debuginfo-0:140.9.0-1.el9_4.x86_64
AppStream-9.4.0.Z.EUS:firefox-debugsource-0:140.9.0-1.el9_4.aarch64
AppStream-9.4.0.Z.EUS:firefox-debugsource-0:140.9.0-1.el9_4.ppc64le
AppStream-9.4.0.Z.EUS:firefox-debugsource-0:140.9.0-1.el9_4.s390x
AppStream-9.4.0.Z.EUS:firefox-debugsource-0:140.9.0-1.el9_4.x86_64
AppStream-9.4.0.Z.EUS:firefox-x11-0:140.9.0-1.el9_4.aarch64
AppStream-9.4.0.Z.EUS:firefox-x11-0:140.9.0-1.el9_4.ppc64le
AppStream-9.4.0.Z.EUS:firefox-x11-0:140.9.0-1.el9_4.s390x
AppStream-9.4.0.Z.EUS:firefox-x11-0:140.9.0-1.el9_4.x86_64
Threats
Impact
Important
A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: Sandbox escape in the Responsive Design Mode component
7.5 (High)
Vendor Fix
For details on how to apply this update, which includes the changes described in this advisory, refer to:
https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2026:7845
Product status
Fixed
AppStream-9.4.0.Z.EUS:firefox-0:140.9.0-1.el9_4.aarch64
AppStream-9.4.0.Z.EUS:firefox-0:140.9.0-1.el9_4.ppc64le
AppStream-9.4.0.Z.EUS:firefox-0:140.9.0-1.el9_4.s390x
AppStream-9.4.0.Z.EUS:firefox-0:140.9.0-1.el9_4.src
AppStream-9.4.0.Z.EUS:firefox-0:140.9.0-1.el9_4.x86_64
AppStream-9.4.0.Z.EUS:firefox-debuginfo-0:140.9.0-1.el9_4.aarch64
AppStream-9.4.0.Z.EUS:firefox-debuginfo-0:140.9.0-1.el9_4.ppc64le
AppStream-9.4.0.Z.EUS:firefox-debuginfo-0:140.9.0-1.el9_4.s390x
AppStream-9.4.0.Z.EUS:firefox-debuginfo-0:140.9.0-1.el9_4.x86_64
AppStream-9.4.0.Z.EUS:firefox-debugsource-0:140.9.0-1.el9_4.aarch64
AppStream-9.4.0.Z.EUS:firefox-debugsource-0:140.9.0-1.el9_4.ppc64le
AppStream-9.4.0.Z.EUS:firefox-debugsource-0:140.9.0-1.el9_4.s390x
AppStream-9.4.0.Z.EUS:firefox-debugsource-0:140.9.0-1.el9_4.x86_64
AppStream-9.4.0.Z.EUS:firefox-x11-0:140.9.0-1.el9_4.aarch64
AppStream-9.4.0.Z.EUS:firefox-x11-0:140.9.0-1.el9_4.ppc64le
AppStream-9.4.0.Z.EUS:firefox-x11-0:140.9.0-1.el9_4.s390x
AppStream-9.4.0.Z.EUS:firefox-x11-0:140.9.0-1.el9_4.x86_64
Threats
Impact
Important
A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: Incorrect boundary conditions in the Audio/Video: Playback component
7.5 (High)
Vendor Fix
For details on how to apply this update, which includes the changes described in this advisory, refer to:
https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2026:7845
Product status
Fixed
AppStream-9.4.0.Z.EUS:firefox-0:140.9.0-1.el9_4.aarch64
AppStream-9.4.0.Z.EUS:firefox-0:140.9.0-1.el9_4.ppc64le
AppStream-9.4.0.Z.EUS:firefox-0:140.9.0-1.el9_4.s390x
AppStream-9.4.0.Z.EUS:firefox-0:140.9.0-1.el9_4.src
AppStream-9.4.0.Z.EUS:firefox-0:140.9.0-1.el9_4.x86_64
AppStream-9.4.0.Z.EUS:firefox-debuginfo-0:140.9.0-1.el9_4.aarch64
AppStream-9.4.0.Z.EUS:firefox-debuginfo-0:140.9.0-1.el9_4.ppc64le
AppStream-9.4.0.Z.EUS:firefox-debuginfo-0:140.9.0-1.el9_4.s390x
AppStream-9.4.0.Z.EUS:firefox-debuginfo-0:140.9.0-1.el9_4.x86_64
AppStream-9.4.0.Z.EUS:firefox-debugsource-0:140.9.0-1.el9_4.aarch64
AppStream-9.4.0.Z.EUS:firefox-debugsource-0:140.9.0-1.el9_4.ppc64le
AppStream-9.4.0.Z.EUS:firefox-debugsource-0:140.9.0-1.el9_4.s390x
AppStream-9.4.0.Z.EUS:firefox-debugsource-0:140.9.0-1.el9_4.x86_64
AppStream-9.4.0.Z.EUS:firefox-x11-0:140.9.0-1.el9_4.aarch64
AppStream-9.4.0.Z.EUS:firefox-x11-0:140.9.0-1.el9_4.ppc64le
AppStream-9.4.0.Z.EUS:firefox-x11-0:140.9.0-1.el9_4.s390x
AppStream-9.4.0.Z.EUS:firefox-x11-0:140.9.0-1.el9_4.x86_64
Threats
Impact
Important
A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: Incorrect boundary conditions, integer overflow in the Graphics component
7.5 (High)
Vendor Fix
For details on how to apply this update, which includes the changes described in this advisory, refer to:
https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2026:7845
Product status
Fixed
AppStream-9.4.0.Z.EUS:firefox-0:140.9.0-1.el9_4.aarch64
AppStream-9.4.0.Z.EUS:firefox-0:140.9.0-1.el9_4.ppc64le
AppStream-9.4.0.Z.EUS:firefox-0:140.9.0-1.el9_4.s390x
AppStream-9.4.0.Z.EUS:firefox-0:140.9.0-1.el9_4.src
AppStream-9.4.0.Z.EUS:firefox-0:140.9.0-1.el9_4.x86_64
AppStream-9.4.0.Z.EUS:firefox-debuginfo-0:140.9.0-1.el9_4.aarch64
AppStream-9.4.0.Z.EUS:firefox-debuginfo-0:140.9.0-1.el9_4.ppc64le
AppStream-9.4.0.Z.EUS:firefox-debuginfo-0:140.9.0-1.el9_4.s390x
AppStream-9.4.0.Z.EUS:firefox-debuginfo-0:140.9.0-1.el9_4.x86_64
AppStream-9.4.0.Z.EUS:firefox-debugsource-0:140.9.0-1.el9_4.aarch64
AppStream-9.4.0.Z.EUS:firefox-debugsource-0:140.9.0-1.el9_4.ppc64le
AppStream-9.4.0.Z.EUS:firefox-debugsource-0:140.9.0-1.el9_4.s390x
AppStream-9.4.0.Z.EUS:firefox-debugsource-0:140.9.0-1.el9_4.x86_64
AppStream-9.4.0.Z.EUS:firefox-x11-0:140.9.0-1.el9_4.aarch64
AppStream-9.4.0.Z.EUS:firefox-x11-0:140.9.0-1.el9_4.ppc64le
AppStream-9.4.0.Z.EUS:firefox-x11-0:140.9.0-1.el9_4.s390x
AppStream-9.4.0.Z.EUS:firefox-x11-0:140.9.0-1.el9_4.x86_64
Threats
Impact
Important
A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: Incorrect boundary conditions in the Audio/Video: Web Codecs component
7.5 (High)
Vendor Fix
For details on how to apply this update, which includes the changes described in this advisory, refer to:
https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2026:7845
Product status
Fixed
AppStream-9.4.0.Z.EUS:firefox-0:140.9.0-1.el9_4.aarch64
AppStream-9.4.0.Z.EUS:firefox-0:140.9.0-1.el9_4.ppc64le
AppStream-9.4.0.Z.EUS:firefox-0:140.9.0-1.el9_4.s390x
AppStream-9.4.0.Z.EUS:firefox-0:140.9.0-1.el9_4.src
AppStream-9.4.0.Z.EUS:firefox-0:140.9.0-1.el9_4.x86_64
AppStream-9.4.0.Z.EUS:firefox-debuginfo-0:140.9.0-1.el9_4.aarch64
AppStream-9.4.0.Z.EUS:firefox-debuginfo-0:140.9.0-1.el9_4.ppc64le
AppStream-9.4.0.Z.EUS:firefox-debuginfo-0:140.9.0-1.el9_4.s390x
AppStream-9.4.0.Z.EUS:firefox-debuginfo-0:140.9.0-1.el9_4.x86_64
AppStream-9.4.0.Z.EUS:firefox-debugsource-0:140.9.0-1.el9_4.aarch64
AppStream-9.4.0.Z.EUS:firefox-debugsource-0:140.9.0-1.el9_4.ppc64le
AppStream-9.4.0.Z.EUS:firefox-debugsource-0:140.9.0-1.el9_4.s390x
AppStream-9.4.0.Z.EUS:firefox-debugsource-0:140.9.0-1.el9_4.x86_64
AppStream-9.4.0.Z.EUS:firefox-x11-0:140.9.0-1.el9_4.aarch64
AppStream-9.4.0.Z.EUS:firefox-x11-0:140.9.0-1.el9_4.ppc64le
AppStream-9.4.0.Z.EUS:firefox-x11-0:140.9.0-1.el9_4.s390x
AppStream-9.4.0.Z.EUS:firefox-x11-0:140.9.0-1.el9_4.x86_64
Threats
Impact
Important
A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: Use-after-free in the Layout: Text and Fonts component
7.5 (High)
Vendor Fix
For details on how to apply this update, which includes the changes described in this advisory, refer to:
https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2026:7845
Product status
Fixed
AppStream-9.4.0.Z.EUS:firefox-0:140.9.0-1.el9_4.aarch64
AppStream-9.4.0.Z.EUS:firefox-0:140.9.0-1.el9_4.ppc64le
AppStream-9.4.0.Z.EUS:firefox-0:140.9.0-1.el9_4.s390x
AppStream-9.4.0.Z.EUS:firefox-0:140.9.0-1.el9_4.src
AppStream-9.4.0.Z.EUS:firefox-0:140.9.0-1.el9_4.x86_64
AppStream-9.4.0.Z.EUS:firefox-debuginfo-0:140.9.0-1.el9_4.aarch64
AppStream-9.4.0.Z.EUS:firefox-debuginfo-0:140.9.0-1.el9_4.ppc64le
AppStream-9.4.0.Z.EUS:firefox-debuginfo-0:140.9.0-1.el9_4.s390x
AppStream-9.4.0.Z.EUS:firefox-debuginfo-0:140.9.0-1.el9_4.x86_64
AppStream-9.4.0.Z.EUS:firefox-debugsource-0:140.9.0-1.el9_4.aarch64
AppStream-9.4.0.Z.EUS:firefox-debugsource-0:140.9.0-1.el9_4.ppc64le
AppStream-9.4.0.Z.EUS:firefox-debugsource-0:140.9.0-1.el9_4.s390x
AppStream-9.4.0.Z.EUS:firefox-debugsource-0:140.9.0-1.el9_4.x86_64
AppStream-9.4.0.Z.EUS:firefox-x11-0:140.9.0-1.el9_4.aarch64
AppStream-9.4.0.Z.EUS:firefox-x11-0:140.9.0-1.el9_4.ppc64le
AppStream-9.4.0.Z.EUS:firefox-x11-0:140.9.0-1.el9_4.s390x
AppStream-9.4.0.Z.EUS:firefox-x11-0:140.9.0-1.el9_4.x86_64
Threats
Impact
Important
A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: Incorrect boundary conditions in the Audio/Video: Web Codecs component
7.5 (High)
Vendor Fix
For details on how to apply this update, which includes the changes described in this advisory, refer to:
https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2026:7845
Product status
Fixed
AppStream-9.4.0.Z.EUS:firefox-0:140.9.0-1.el9_4.aarch64
AppStream-9.4.0.Z.EUS:firefox-0:140.9.0-1.el9_4.ppc64le
AppStream-9.4.0.Z.EUS:firefox-0:140.9.0-1.el9_4.s390x
AppStream-9.4.0.Z.EUS:firefox-0:140.9.0-1.el9_4.src
AppStream-9.4.0.Z.EUS:firefox-0:140.9.0-1.el9_4.x86_64
AppStream-9.4.0.Z.EUS:firefox-debuginfo-0:140.9.0-1.el9_4.aarch64
AppStream-9.4.0.Z.EUS:firefox-debuginfo-0:140.9.0-1.el9_4.ppc64le
AppStream-9.4.0.Z.EUS:firefox-debuginfo-0:140.9.0-1.el9_4.s390x
AppStream-9.4.0.Z.EUS:firefox-debuginfo-0:140.9.0-1.el9_4.x86_64
AppStream-9.4.0.Z.EUS:firefox-debugsource-0:140.9.0-1.el9_4.aarch64
AppStream-9.4.0.Z.EUS:firefox-debugsource-0:140.9.0-1.el9_4.ppc64le
AppStream-9.4.0.Z.EUS:firefox-debugsource-0:140.9.0-1.el9_4.s390x
AppStream-9.4.0.Z.EUS:firefox-debugsource-0:140.9.0-1.el9_4.x86_64
AppStream-9.4.0.Z.EUS:firefox-x11-0:140.9.0-1.el9_4.aarch64
AppStream-9.4.0.Z.EUS:firefox-x11-0:140.9.0-1.el9_4.ppc64le
AppStream-9.4.0.Z.EUS:firefox-x11-0:140.9.0-1.el9_4.s390x
AppStream-9.4.0.Z.EUS:firefox-x11-0:140.9.0-1.el9_4.x86_64
Threats
Impact
Important
A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: JIT miscompilation in the JavaScript Engine: JIT component
7.5 (High)
Vendor Fix
For details on how to apply this update, which includes the changes described in this advisory, refer to:
https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2026:7845
Product status
Fixed
AppStream-9.4.0.Z.EUS:firefox-0:140.9.0-1.el9_4.aarch64
AppStream-9.4.0.Z.EUS:firefox-0:140.9.0-1.el9_4.ppc64le
AppStream-9.4.0.Z.EUS:firefox-0:140.9.0-1.el9_4.s390x
AppStream-9.4.0.Z.EUS:firefox-0:140.9.0-1.el9_4.src
AppStream-9.4.0.Z.EUS:firefox-0:140.9.0-1.el9_4.x86_64
AppStream-9.4.0.Z.EUS:firefox-debuginfo-0:140.9.0-1.el9_4.aarch64
AppStream-9.4.0.Z.EUS:firefox-debuginfo-0:140.9.0-1.el9_4.ppc64le
AppStream-9.4.0.Z.EUS:firefox-debuginfo-0:140.9.0-1.el9_4.s390x
AppStream-9.4.0.Z.EUS:firefox-debuginfo-0:140.9.0-1.el9_4.x86_64
AppStream-9.4.0.Z.EUS:firefox-debugsource-0:140.9.0-1.el9_4.aarch64
AppStream-9.4.0.Z.EUS:firefox-debugsource-0:140.9.0-1.el9_4.ppc64le
AppStream-9.4.0.Z.EUS:firefox-debugsource-0:140.9.0-1.el9_4.s390x
AppStream-9.4.0.Z.EUS:firefox-debugsource-0:140.9.0-1.el9_4.x86_64
AppStream-9.4.0.Z.EUS:firefox-x11-0:140.9.0-1.el9_4.aarch64
AppStream-9.4.0.Z.EUS:firefox-x11-0:140.9.0-1.el9_4.ppc64le
AppStream-9.4.0.Z.EUS:firefox-x11-0:140.9.0-1.el9_4.s390x
AppStream-9.4.0.Z.EUS:firefox-x11-0:140.9.0-1.el9_4.x86_64
Threats
Impact
Important
A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: Incorrect boundary conditions in the Layout: Text and Fonts component
7.5 (High)
Vendor Fix
For details on how to apply this update, which includes the changes described in this advisory, refer to:
https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2026:7845
Product status
Fixed
AppStream-9.4.0.Z.EUS:firefox-0:140.9.0-1.el9_4.aarch64
AppStream-9.4.0.Z.EUS:firefox-0:140.9.0-1.el9_4.ppc64le
AppStream-9.4.0.Z.EUS:firefox-0:140.9.0-1.el9_4.s390x
AppStream-9.4.0.Z.EUS:firefox-0:140.9.0-1.el9_4.src
AppStream-9.4.0.Z.EUS:firefox-0:140.9.0-1.el9_4.x86_64
AppStream-9.4.0.Z.EUS:firefox-debuginfo-0:140.9.0-1.el9_4.aarch64
AppStream-9.4.0.Z.EUS:firefox-debuginfo-0:140.9.0-1.el9_4.ppc64le
AppStream-9.4.0.Z.EUS:firefox-debuginfo-0:140.9.0-1.el9_4.s390x
AppStream-9.4.0.Z.EUS:firefox-debuginfo-0:140.9.0-1.el9_4.x86_64
AppStream-9.4.0.Z.EUS:firefox-debugsource-0:140.9.0-1.el9_4.aarch64
AppStream-9.4.0.Z.EUS:firefox-debugsource-0:140.9.0-1.el9_4.ppc64le
AppStream-9.4.0.Z.EUS:firefox-debugsource-0:140.9.0-1.el9_4.s390x
AppStream-9.4.0.Z.EUS:firefox-debugsource-0:140.9.0-1.el9_4.x86_64
AppStream-9.4.0.Z.EUS:firefox-x11-0:140.9.0-1.el9_4.aarch64
AppStream-9.4.0.Z.EUS:firefox-x11-0:140.9.0-1.el9_4.ppc64le
AppStream-9.4.0.Z.EUS:firefox-x11-0:140.9.0-1.el9_4.s390x
AppStream-9.4.0.Z.EUS:firefox-x11-0:140.9.0-1.el9_4.x86_64
Threats
Impact
Important
A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: Mitigation bypass in the Networking: HTTP component
7.5 (High)
Vendor Fix
For details on how to apply this update, which includes the changes described in this advisory, refer to:
https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2026:7845
Product status
Fixed
AppStream-9.4.0.Z.EUS:firefox-0:140.9.0-1.el9_4.aarch64
AppStream-9.4.0.Z.EUS:firefox-0:140.9.0-1.el9_4.ppc64le
AppStream-9.4.0.Z.EUS:firefox-0:140.9.0-1.el9_4.s390x
AppStream-9.4.0.Z.EUS:firefox-0:140.9.0-1.el9_4.src
AppStream-9.4.0.Z.EUS:firefox-0:140.9.0-1.el9_4.x86_64
AppStream-9.4.0.Z.EUS:firefox-debuginfo-0:140.9.0-1.el9_4.aarch64
AppStream-9.4.0.Z.EUS:firefox-debuginfo-0:140.9.0-1.el9_4.ppc64le
AppStream-9.4.0.Z.EUS:firefox-debuginfo-0:140.9.0-1.el9_4.s390x
AppStream-9.4.0.Z.EUS:firefox-debuginfo-0:140.9.0-1.el9_4.x86_64
AppStream-9.4.0.Z.EUS:firefox-debugsource-0:140.9.0-1.el9_4.aarch64
AppStream-9.4.0.Z.EUS:firefox-debugsource-0:140.9.0-1.el9_4.ppc64le
AppStream-9.4.0.Z.EUS:firefox-debugsource-0:140.9.0-1.el9_4.s390x
AppStream-9.4.0.Z.EUS:firefox-debugsource-0:140.9.0-1.el9_4.x86_64
AppStream-9.4.0.Z.EUS:firefox-x11-0:140.9.0-1.el9_4.aarch64
AppStream-9.4.0.Z.EUS:firefox-x11-0:140.9.0-1.el9_4.ppc64le
AppStream-9.4.0.Z.EUS:firefox-x11-0:140.9.0-1.el9_4.s390x
AppStream-9.4.0.Z.EUS:firefox-x11-0:140.9.0-1.el9_4.x86_64
Threats
Impact
Important
A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: Use-after-free in the JavaScript Engine component
6.1 (Medium)
Vendor Fix
For details on how to apply this update, which includes the changes described in this advisory, refer to:
https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2026:7845
Product status
Fixed
AppStream-9.4.0.Z.EUS:firefox-0:140.9.0-1.el9_4.aarch64
AppStream-9.4.0.Z.EUS:firefox-0:140.9.0-1.el9_4.ppc64le
AppStream-9.4.0.Z.EUS:firefox-0:140.9.0-1.el9_4.s390x
AppStream-9.4.0.Z.EUS:firefox-0:140.9.0-1.el9_4.src
AppStream-9.4.0.Z.EUS:firefox-0:140.9.0-1.el9_4.x86_64
AppStream-9.4.0.Z.EUS:firefox-debuginfo-0:140.9.0-1.el9_4.aarch64
AppStream-9.4.0.Z.EUS:firefox-debuginfo-0:140.9.0-1.el9_4.ppc64le
AppStream-9.4.0.Z.EUS:firefox-debuginfo-0:140.9.0-1.el9_4.s390x
AppStream-9.4.0.Z.EUS:firefox-debuginfo-0:140.9.0-1.el9_4.x86_64
AppStream-9.4.0.Z.EUS:firefox-debugsource-0:140.9.0-1.el9_4.aarch64
AppStream-9.4.0.Z.EUS:firefox-debugsource-0:140.9.0-1.el9_4.ppc64le
AppStream-9.4.0.Z.EUS:firefox-debugsource-0:140.9.0-1.el9_4.s390x
AppStream-9.4.0.Z.EUS:firefox-debugsource-0:140.9.0-1.el9_4.x86_64
AppStream-9.4.0.Z.EUS:firefox-x11-0:140.9.0-1.el9_4.aarch64
AppStream-9.4.0.Z.EUS:firefox-x11-0:140.9.0-1.el9_4.ppc64le
AppStream-9.4.0.Z.EUS:firefox-x11-0:140.9.0-1.el9_4.s390x
AppStream-9.4.0.Z.EUS:firefox-x11-0:140.9.0-1.el9_4.x86_64
Threats
Impact
Moderate
A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: JIT miscompilation in the JavaScript Engine component
6.1 (Medium)
Vendor Fix
For details on how to apply this update, which includes the changes described in this advisory, refer to:
https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2026:7845
Product status
Fixed
AppStream-9.4.0.Z.EUS:firefox-0:140.9.0-1.el9_4.aarch64
AppStream-9.4.0.Z.EUS:firefox-0:140.9.0-1.el9_4.ppc64le
AppStream-9.4.0.Z.EUS:firefox-0:140.9.0-1.el9_4.s390x
AppStream-9.4.0.Z.EUS:firefox-0:140.9.0-1.el9_4.src
AppStream-9.4.0.Z.EUS:firefox-0:140.9.0-1.el9_4.x86_64
AppStream-9.4.0.Z.EUS:firefox-debuginfo-0:140.9.0-1.el9_4.aarch64
AppStream-9.4.0.Z.EUS:firefox-debuginfo-0:140.9.0-1.el9_4.ppc64le
AppStream-9.4.0.Z.EUS:firefox-debuginfo-0:140.9.0-1.el9_4.s390x
AppStream-9.4.0.Z.EUS:firefox-debuginfo-0:140.9.0-1.el9_4.x86_64
AppStream-9.4.0.Z.EUS:firefox-debugsource-0:140.9.0-1.el9_4.aarch64
AppStream-9.4.0.Z.EUS:firefox-debugsource-0:140.9.0-1.el9_4.ppc64le
AppStream-9.4.0.Z.EUS:firefox-debugsource-0:140.9.0-1.el9_4.s390x
AppStream-9.4.0.Z.EUS:firefox-debugsource-0:140.9.0-1.el9_4.x86_64
AppStream-9.4.0.Z.EUS:firefox-x11-0:140.9.0-1.el9_4.aarch64
AppStream-9.4.0.Z.EUS:firefox-x11-0:140.9.0-1.el9_4.ppc64le
AppStream-9.4.0.Z.EUS:firefox-x11-0:140.9.0-1.el9_4.s390x
AppStream-9.4.0.Z.EUS:firefox-x11-0:140.9.0-1.el9_4.x86_64
Threats
Impact
Moderate
A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: Denial-of-service in the WebRTC: Signaling component
7.5 (High)
Vendor Fix
For details on how to apply this update, which includes the changes described in this advisory, refer to:
https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2026:7845
Product status
Fixed
AppStream-9.4.0.Z.EUS:firefox-0:140.9.0-1.el9_4.aarch64
AppStream-9.4.0.Z.EUS:firefox-0:140.9.0-1.el9_4.ppc64le
AppStream-9.4.0.Z.EUS:firefox-0:140.9.0-1.el9_4.s390x
AppStream-9.4.0.Z.EUS:firefox-0:140.9.0-1.el9_4.src
AppStream-9.4.0.Z.EUS:firefox-0:140.9.0-1.el9_4.x86_64
AppStream-9.4.0.Z.EUS:firefox-debuginfo-0:140.9.0-1.el9_4.aarch64
AppStream-9.4.0.Z.EUS:firefox-debuginfo-0:140.9.0-1.el9_4.ppc64le
AppStream-9.4.0.Z.EUS:firefox-debuginfo-0:140.9.0-1.el9_4.s390x
AppStream-9.4.0.Z.EUS:firefox-debuginfo-0:140.9.0-1.el9_4.x86_64
AppStream-9.4.0.Z.EUS:firefox-debugsource-0:140.9.0-1.el9_4.aarch64
AppStream-9.4.0.Z.EUS:firefox-debugsource-0:140.9.0-1.el9_4.ppc64le
AppStream-9.4.0.Z.EUS:firefox-debugsource-0:140.9.0-1.el9_4.s390x
AppStream-9.4.0.Z.EUS:firefox-debugsource-0:140.9.0-1.el9_4.x86_64
AppStream-9.4.0.Z.EUS:firefox-x11-0:140.9.0-1.el9_4.aarch64
AppStream-9.4.0.Z.EUS:firefox-x11-0:140.9.0-1.el9_4.ppc64le
AppStream-9.4.0.Z.EUS:firefox-x11-0:140.9.0-1.el9_4.s390x
AppStream-9.4.0.Z.EUS:firefox-x11-0:140.9.0-1.el9_4.x86_64
Threats
Impact
Moderate
A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: Undefined behavior in the WebRTC: Signaling component
6.5 (Medium)
Vendor Fix
For details on how to apply this update, which includes the changes described in this advisory, refer to:
https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2026:7845
Product status
Fixed
AppStream-9.4.0.Z.EUS:firefox-0:140.9.0-1.el9_4.aarch64
AppStream-9.4.0.Z.EUS:firefox-0:140.9.0-1.el9_4.ppc64le
AppStream-9.4.0.Z.EUS:firefox-0:140.9.0-1.el9_4.s390x
AppStream-9.4.0.Z.EUS:firefox-0:140.9.0-1.el9_4.src
AppStream-9.4.0.Z.EUS:firefox-0:140.9.0-1.el9_4.x86_64
AppStream-9.4.0.Z.EUS:firefox-debuginfo-0:140.9.0-1.el9_4.aarch64
AppStream-9.4.0.Z.EUS:firefox-debuginfo-0:140.9.0-1.el9_4.ppc64le
AppStream-9.4.0.Z.EUS:firefox-debuginfo-0:140.9.0-1.el9_4.s390x
AppStream-9.4.0.Z.EUS:firefox-debuginfo-0:140.9.0-1.el9_4.x86_64
AppStream-9.4.0.Z.EUS:firefox-debugsource-0:140.9.0-1.el9_4.aarch64
AppStream-9.4.0.Z.EUS:firefox-debugsource-0:140.9.0-1.el9_4.ppc64le
AppStream-9.4.0.Z.EUS:firefox-debugsource-0:140.9.0-1.el9_4.s390x
AppStream-9.4.0.Z.EUS:firefox-debugsource-0:140.9.0-1.el9_4.x86_64
AppStream-9.4.0.Z.EUS:firefox-x11-0:140.9.0-1.el9_4.aarch64
AppStream-9.4.0.Z.EUS:firefox-x11-0:140.9.0-1.el9_4.ppc64le
AppStream-9.4.0.Z.EUS:firefox-x11-0:140.9.0-1.el9_4.s390x
AppStream-9.4.0.Z.EUS:firefox-x11-0:140.9.0-1.el9_4.x86_64
Threats
Impact
Moderate
A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: Incorrect boundary conditions in the Graphics: Canvas2D component
6.1 (Medium)
Vendor Fix
For details on how to apply this update, which includes the changes described in this advisory, refer to:
https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2026:7845
Product status
Fixed
AppStream-9.4.0.Z.EUS:firefox-0:140.9.0-1.el9_4.aarch64
AppStream-9.4.0.Z.EUS:firefox-0:140.9.0-1.el9_4.ppc64le
AppStream-9.4.0.Z.EUS:firefox-0:140.9.0-1.el9_4.s390x
AppStream-9.4.0.Z.EUS:firefox-0:140.9.0-1.el9_4.src
AppStream-9.4.0.Z.EUS:firefox-0:140.9.0-1.el9_4.x86_64
AppStream-9.4.0.Z.EUS:firefox-debuginfo-0:140.9.0-1.el9_4.aarch64
AppStream-9.4.0.Z.EUS:firefox-debuginfo-0:140.9.0-1.el9_4.ppc64le
AppStream-9.4.0.Z.EUS:firefox-debuginfo-0:140.9.0-1.el9_4.s390x
AppStream-9.4.0.Z.EUS:firefox-debuginfo-0:140.9.0-1.el9_4.x86_64
AppStream-9.4.0.Z.EUS:firefox-debugsource-0:140.9.0-1.el9_4.aarch64
AppStream-9.4.0.Z.EUS:firefox-debugsource-0:140.9.0-1.el9_4.ppc64le
AppStream-9.4.0.Z.EUS:firefox-debugsource-0:140.9.0-1.el9_4.s390x
AppStream-9.4.0.Z.EUS:firefox-debugsource-0:140.9.0-1.el9_4.x86_64
AppStream-9.4.0.Z.EUS:firefox-x11-0:140.9.0-1.el9_4.aarch64
AppStream-9.4.0.Z.EUS:firefox-x11-0:140.9.0-1.el9_4.ppc64le
AppStream-9.4.0.Z.EUS:firefox-x11-0:140.9.0-1.el9_4.s390x
AppStream-9.4.0.Z.EUS:firefox-x11-0:140.9.0-1.el9_4.x86_64
Threats
Impact
Moderate
A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: Incorrect boundary conditions in the Graphics: Canvas2D component
6.1 (Medium)
Vendor Fix
For details on how to apply this update, which includes the changes described in this advisory, refer to:
https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2026:7845
Product status
Fixed
AppStream-9.4.0.Z.EUS:firefox-0:140.9.0-1.el9_4.aarch64
AppStream-9.4.0.Z.EUS:firefox-0:140.9.0-1.el9_4.ppc64le
AppStream-9.4.0.Z.EUS:firefox-0:140.9.0-1.el9_4.s390x
AppStream-9.4.0.Z.EUS:firefox-0:140.9.0-1.el9_4.src
AppStream-9.4.0.Z.EUS:firefox-0:140.9.0-1.el9_4.x86_64
AppStream-9.4.0.Z.EUS:firefox-debuginfo-0:140.9.0-1.el9_4.aarch64
AppStream-9.4.0.Z.EUS:firefox-debuginfo-0:140.9.0-1.el9_4.ppc64le
AppStream-9.4.0.Z.EUS:firefox-debuginfo-0:140.9.0-1.el9_4.s390x
AppStream-9.4.0.Z.EUS:firefox-debuginfo-0:140.9.0-1.el9_4.x86_64
AppStream-9.4.0.Z.EUS:firefox-debugsource-0:140.9.0-1.el9_4.aarch64
AppStream-9.4.0.Z.EUS:firefox-debugsource-0:140.9.0-1.el9_4.ppc64le
AppStream-9.4.0.Z.EUS:firefox-debugsource-0:140.9.0-1.el9_4.s390x
AppStream-9.4.0.Z.EUS:firefox-debugsource-0:140.9.0-1.el9_4.x86_64
AppStream-9.4.0.Z.EUS:firefox-x11-0:140.9.0-1.el9_4.aarch64
AppStream-9.4.0.Z.EUS:firefox-x11-0:140.9.0-1.el9_4.ppc64le
AppStream-9.4.0.Z.EUS:firefox-x11-0:140.9.0-1.el9_4.s390x
AppStream-9.4.0.Z.EUS:firefox-x11-0:140.9.0-1.el9_4.x86_64
Threats
Impact
Moderate
A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: Incorrect boundary conditions in the Graphics component
6.1 (Medium)
Vendor Fix
For details on how to apply this update, which includes the changes described in this advisory, refer to:
https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2026:7845
Product status
Fixed
AppStream-9.4.0.Z.EUS:firefox-0:140.9.0-1.el9_4.aarch64
AppStream-9.4.0.Z.EUS:firefox-0:140.9.0-1.el9_4.ppc64le
AppStream-9.4.0.Z.EUS:firefox-0:140.9.0-1.el9_4.s390x
AppStream-9.4.0.Z.EUS:firefox-0:140.9.0-1.el9_4.src
AppStream-9.4.0.Z.EUS:firefox-0:140.9.0-1.el9_4.x86_64
AppStream-9.4.0.Z.EUS:firefox-debuginfo-0:140.9.0-1.el9_4.aarch64
AppStream-9.4.0.Z.EUS:firefox-debuginfo-0:140.9.0-1.el9_4.ppc64le
AppStream-9.4.0.Z.EUS:firefox-debuginfo-0:140.9.0-1.el9_4.s390x
AppStream-9.4.0.Z.EUS:firefox-debuginfo-0:140.9.0-1.el9_4.x86_64
AppStream-9.4.0.Z.EUS:firefox-debugsource-0:140.9.0-1.el9_4.aarch64
AppStream-9.4.0.Z.EUS:firefox-debugsource-0:140.9.0-1.el9_4.ppc64le
AppStream-9.4.0.Z.EUS:firefox-debugsource-0:140.9.0-1.el9_4.s390x
AppStream-9.4.0.Z.EUS:firefox-debugsource-0:140.9.0-1.el9_4.x86_64
AppStream-9.4.0.Z.EUS:firefox-x11-0:140.9.0-1.el9_4.aarch64
AppStream-9.4.0.Z.EUS:firefox-x11-0:140.9.0-1.el9_4.ppc64le
AppStream-9.4.0.Z.EUS:firefox-x11-0:140.9.0-1.el9_4.s390x
AppStream-9.4.0.Z.EUS:firefox-x11-0:140.9.0-1.el9_4.x86_64
Threats
Impact
Moderate
A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: Incorrect boundary conditions in the Audio/Video: GMP component
6.1 (Medium)
Vendor Fix
For details on how to apply this update, which includes the changes described in this advisory, refer to:
https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2026:7845
Product status
Fixed
AppStream-9.4.0.Z.EUS:firefox-0:140.9.0-1.el9_4.aarch64
AppStream-9.4.0.Z.EUS:firefox-0:140.9.0-1.el9_4.ppc64le
AppStream-9.4.0.Z.EUS:firefox-0:140.9.0-1.el9_4.s390x
AppStream-9.4.0.Z.EUS:firefox-0:140.9.0-1.el9_4.src
AppStream-9.4.0.Z.EUS:firefox-0:140.9.0-1.el9_4.x86_64
AppStream-9.4.0.Z.EUS:firefox-debuginfo-0:140.9.0-1.el9_4.aarch64
AppStream-9.4.0.Z.EUS:firefox-debuginfo-0:140.9.0-1.el9_4.ppc64le
AppStream-9.4.0.Z.EUS:firefox-debuginfo-0:140.9.0-1.el9_4.s390x
AppStream-9.4.0.Z.EUS:firefox-debuginfo-0:140.9.0-1.el9_4.x86_64
AppStream-9.4.0.Z.EUS:firefox-debugsource-0:140.9.0-1.el9_4.aarch64
AppStream-9.4.0.Z.EUS:firefox-debugsource-0:140.9.0-1.el9_4.ppc64le
AppStream-9.4.0.Z.EUS:firefox-debugsource-0:140.9.0-1.el9_4.s390x
AppStream-9.4.0.Z.EUS:firefox-debugsource-0:140.9.0-1.el9_4.x86_64
AppStream-9.4.0.Z.EUS:firefox-x11-0:140.9.0-1.el9_4.aarch64
AppStream-9.4.0.Z.EUS:firefox-x11-0:140.9.0-1.el9_4.ppc64le
AppStream-9.4.0.Z.EUS:firefox-x11-0:140.9.0-1.el9_4.s390x
AppStream-9.4.0.Z.EUS:firefox-x11-0:140.9.0-1.el9_4.x86_64
Threats
Impact
Moderate
A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: Incorrect boundary conditions in the Audio/Video component
6.1 (Medium)
Vendor Fix
For details on how to apply this update, which includes the changes described in this advisory, refer to:
https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2026:7845
Product status
Fixed
AppStream-9.4.0.Z.EUS:firefox-0:140.9.0-1.el9_4.aarch64
AppStream-9.4.0.Z.EUS:firefox-0:140.9.0-1.el9_4.ppc64le
AppStream-9.4.0.Z.EUS:firefox-0:140.9.0-1.el9_4.s390x
AppStream-9.4.0.Z.EUS:firefox-0:140.9.0-1.el9_4.src
AppStream-9.4.0.Z.EUS:firefox-0:140.9.0-1.el9_4.x86_64
AppStream-9.4.0.Z.EUS:firefox-debuginfo-0:140.9.0-1.el9_4.aarch64
AppStream-9.4.0.Z.EUS:firefox-debuginfo-0:140.9.0-1.el9_4.ppc64le
AppStream-9.4.0.Z.EUS:firefox-debuginfo-0:140.9.0-1.el9_4.s390x
AppStream-9.4.0.Z.EUS:firefox-debuginfo-0:140.9.0-1.el9_4.x86_64
AppStream-9.4.0.Z.EUS:firefox-debugsource-0:140.9.0-1.el9_4.aarch64
AppStream-9.4.0.Z.EUS:firefox-debugsource-0:140.9.0-1.el9_4.ppc64le
AppStream-9.4.0.Z.EUS:firefox-debugsource-0:140.9.0-1.el9_4.s390x
AppStream-9.4.0.Z.EUS:firefox-debugsource-0:140.9.0-1.el9_4.x86_64
AppStream-9.4.0.Z.EUS:firefox-x11-0:140.9.0-1.el9_4.aarch64
AppStream-9.4.0.Z.EUS:firefox-x11-0:140.9.0-1.el9_4.ppc64le
AppStream-9.4.0.Z.EUS:firefox-x11-0:140.9.0-1.el9_4.s390x
AppStream-9.4.0.Z.EUS:firefox-x11-0:140.9.0-1.el9_4.x86_64
Threats
Impact
Moderate
A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: Use-after-free in the Widget: Cocoa component
6.1 (Medium)
Vendor Fix
For details on how to apply this update, which includes the changes described in this advisory, refer to:
https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2026:7845
Product status
Fixed
AppStream-9.4.0.Z.EUS:firefox-0:140.9.0-1.el9_4.aarch64
AppStream-9.4.0.Z.EUS:firefox-0:140.9.0-1.el9_4.ppc64le
AppStream-9.4.0.Z.EUS:firefox-0:140.9.0-1.el9_4.s390x
AppStream-9.4.0.Z.EUS:firefox-0:140.9.0-1.el9_4.src
AppStream-9.4.0.Z.EUS:firefox-0:140.9.0-1.el9_4.x86_64
AppStream-9.4.0.Z.EUS:firefox-debuginfo-0:140.9.0-1.el9_4.aarch64
AppStream-9.4.0.Z.EUS:firefox-debuginfo-0:140.9.0-1.el9_4.ppc64le
AppStream-9.4.0.Z.EUS:firefox-debuginfo-0:140.9.0-1.el9_4.s390x
AppStream-9.4.0.Z.EUS:firefox-debuginfo-0:140.9.0-1.el9_4.x86_64
AppStream-9.4.0.Z.EUS:firefox-debugsource-0:140.9.0-1.el9_4.aarch64
AppStream-9.4.0.Z.EUS:firefox-debugsource-0:140.9.0-1.el9_4.ppc64le
AppStream-9.4.0.Z.EUS:firefox-debugsource-0:140.9.0-1.el9_4.s390x
AppStream-9.4.0.Z.EUS:firefox-debugsource-0:140.9.0-1.el9_4.x86_64
AppStream-9.4.0.Z.EUS:firefox-x11-0:140.9.0-1.el9_4.aarch64
AppStream-9.4.0.Z.EUS:firefox-x11-0:140.9.0-1.el9_4.ppc64le
AppStream-9.4.0.Z.EUS:firefox-x11-0:140.9.0-1.el9_4.s390x
AppStream-9.4.0.Z.EUS:firefox-x11-0:140.9.0-1.el9_4.x86_64
Threats
Impact
Moderate
A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: Information disclosure in the Widget: Cocoa component
6.5 (Medium)
Vendor Fix
For details on how to apply this update, which includes the changes described in this advisory, refer to:
https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2026:7845
Product status
Fixed
AppStream-9.4.0.Z.EUS:firefox-0:140.9.0-1.el9_4.aarch64
AppStream-9.4.0.Z.EUS:firefox-0:140.9.0-1.el9_4.ppc64le
AppStream-9.4.0.Z.EUS:firefox-0:140.9.0-1.el9_4.s390x
AppStream-9.4.0.Z.EUS:firefox-0:140.9.0-1.el9_4.src
AppStream-9.4.0.Z.EUS:firefox-0:140.9.0-1.el9_4.x86_64
AppStream-9.4.0.Z.EUS:firefox-debuginfo-0:140.9.0-1.el9_4.aarch64
AppStream-9.4.0.Z.EUS:firefox-debuginfo-0:140.9.0-1.el9_4.ppc64le
AppStream-9.4.0.Z.EUS:firefox-debuginfo-0:140.9.0-1.el9_4.s390x
AppStream-9.4.0.Z.EUS:firefox-debuginfo-0:140.9.0-1.el9_4.x86_64
AppStream-9.4.0.Z.EUS:firefox-debugsource-0:140.9.0-1.el9_4.aarch64
AppStream-9.4.0.Z.EUS:firefox-debugsource-0:140.9.0-1.el9_4.ppc64le
AppStream-9.4.0.Z.EUS:firefox-debugsource-0:140.9.0-1.el9_4.s390x
AppStream-9.4.0.Z.EUS:firefox-debugsource-0:140.9.0-1.el9_4.x86_64
AppStream-9.4.0.Z.EUS:firefox-x11-0:140.9.0-1.el9_4.aarch64
AppStream-9.4.0.Z.EUS:firefox-x11-0:140.9.0-1.el9_4.ppc64le
AppStream-9.4.0.Z.EUS:firefox-x11-0:140.9.0-1.el9_4.s390x
AppStream-9.4.0.Z.EUS:firefox-x11-0:140.9.0-1.el9_4.x86_64
Threats
Impact
Moderate
A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: Incorrect boundary conditions in the Graphics component
6.1 (Medium)
Vendor Fix
For details on how to apply this update, which includes the changes described in this advisory, refer to:
https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2026:7845
Product status
Fixed
AppStream-9.4.0.Z.EUS:firefox-0:140.9.0-1.el9_4.aarch64
AppStream-9.4.0.Z.EUS:firefox-0:140.9.0-1.el9_4.ppc64le
AppStream-9.4.0.Z.EUS:firefox-0:140.9.0-1.el9_4.s390x
AppStream-9.4.0.Z.EUS:firefox-0:140.9.0-1.el9_4.src
AppStream-9.4.0.Z.EUS:firefox-0:140.9.0-1.el9_4.x86_64
AppStream-9.4.0.Z.EUS:firefox-debuginfo-0:140.9.0-1.el9_4.aarch64
AppStream-9.4.0.Z.EUS:firefox-debuginfo-0:140.9.0-1.el9_4.ppc64le
AppStream-9.4.0.Z.EUS:firefox-debuginfo-0:140.9.0-1.el9_4.s390x
AppStream-9.4.0.Z.EUS:firefox-debuginfo-0:140.9.0-1.el9_4.x86_64
AppStream-9.4.0.Z.EUS:firefox-debugsource-0:140.9.0-1.el9_4.aarch64
AppStream-9.4.0.Z.EUS:firefox-debugsource-0:140.9.0-1.el9_4.ppc64le
AppStream-9.4.0.Z.EUS:firefox-debugsource-0:140.9.0-1.el9_4.s390x
AppStream-9.4.0.Z.EUS:firefox-debugsource-0:140.9.0-1.el9_4.x86_64
AppStream-9.4.0.Z.EUS:firefox-x11-0:140.9.0-1.el9_4.aarch64
AppStream-9.4.0.Z.EUS:firefox-x11-0:140.9.0-1.el9_4.ppc64le
AppStream-9.4.0.Z.EUS:firefox-x11-0:140.9.0-1.el9_4.s390x
AppStream-9.4.0.Z.EUS:firefox-x11-0:140.9.0-1.el9_4.x86_64
Threats
Impact
Moderate
A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: Incorrect boundary conditions in the Audio/Video component
6.5 (Medium)
Vendor Fix
For details on how to apply this update, which includes the changes described in this advisory, refer to:
https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2026:7845
Product status
Fixed
AppStream-9.4.0.Z.EUS:firefox-0:140.9.0-1.el9_4.aarch64
AppStream-9.4.0.Z.EUS:firefox-0:140.9.0-1.el9_4.ppc64le
AppStream-9.4.0.Z.EUS:firefox-0:140.9.0-1.el9_4.s390x
AppStream-9.4.0.Z.EUS:firefox-0:140.9.0-1.el9_4.src
AppStream-9.4.0.Z.EUS:firefox-0:140.9.0-1.el9_4.x86_64
AppStream-9.4.0.Z.EUS:firefox-debuginfo-0:140.9.0-1.el9_4.aarch64
AppStream-9.4.0.Z.EUS:firefox-debuginfo-0:140.9.0-1.el9_4.ppc64le
AppStream-9.4.0.Z.EUS:firefox-debuginfo-0:140.9.0-1.el9_4.s390x
AppStream-9.4.0.Z.EUS:firefox-debuginfo-0:140.9.0-1.el9_4.x86_64
AppStream-9.4.0.Z.EUS:firefox-debugsource-0:140.9.0-1.el9_4.aarch64
AppStream-9.4.0.Z.EUS:firefox-debugsource-0:140.9.0-1.el9_4.ppc64le
AppStream-9.4.0.Z.EUS:firefox-debugsource-0:140.9.0-1.el9_4.s390x
AppStream-9.4.0.Z.EUS:firefox-debugsource-0:140.9.0-1.el9_4.x86_64
AppStream-9.4.0.Z.EUS:firefox-x11-0:140.9.0-1.el9_4.aarch64
AppStream-9.4.0.Z.EUS:firefox-x11-0:140.9.0-1.el9_4.ppc64le
AppStream-9.4.0.Z.EUS:firefox-x11-0:140.9.0-1.el9_4.s390x
AppStream-9.4.0.Z.EUS:firefox-x11-0:140.9.0-1.el9_4.x86_64
Threats
Impact
Moderate
A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: Uninitialized memory in the Graphics: Canvas2D component
6.5 (Medium)
Vendor Fix
For details on how to apply this update, which includes the changes described in this advisory, refer to:
https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2026:7845
Product status
Fixed
AppStream-9.4.0.Z.EUS:firefox-0:140.9.0-1.el9_4.aarch64
AppStream-9.4.0.Z.EUS:firefox-0:140.9.0-1.el9_4.ppc64le
AppStream-9.4.0.Z.EUS:firefox-0:140.9.0-1.el9_4.s390x
AppStream-9.4.0.Z.EUS:firefox-0:140.9.0-1.el9_4.src
AppStream-9.4.0.Z.EUS:firefox-0:140.9.0-1.el9_4.x86_64
AppStream-9.4.0.Z.EUS:firefox-debuginfo-0:140.9.0-1.el9_4.aarch64
AppStream-9.4.0.Z.EUS:firefox-debuginfo-0:140.9.0-1.el9_4.ppc64le
AppStream-9.4.0.Z.EUS:firefox-debuginfo-0:140.9.0-1.el9_4.s390x
AppStream-9.4.0.Z.EUS:firefox-debuginfo-0:140.9.0-1.el9_4.x86_64
AppStream-9.4.0.Z.EUS:firefox-debugsource-0:140.9.0-1.el9_4.aarch64
AppStream-9.4.0.Z.EUS:firefox-debugsource-0:140.9.0-1.el9_4.ppc64le
AppStream-9.4.0.Z.EUS:firefox-debugsource-0:140.9.0-1.el9_4.s390x
AppStream-9.4.0.Z.EUS:firefox-debugsource-0:140.9.0-1.el9_4.x86_64
AppStream-9.4.0.Z.EUS:firefox-x11-0:140.9.0-1.el9_4.aarch64
AppStream-9.4.0.Z.EUS:firefox-x11-0:140.9.0-1.el9_4.ppc64le
AppStream-9.4.0.Z.EUS:firefox-x11-0:140.9.0-1.el9_4.s390x
AppStream-9.4.0.Z.EUS:firefox-x11-0:140.9.0-1.el9_4.x86_64
Threats
Impact
Moderate
A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: Incorrect boundary conditions, uninitialized memory in the JavaScript Engine component
6.1 (Medium)
Vendor Fix
For details on how to apply this update, which includes the changes described in this advisory, refer to:
https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2026:7845
Product status
Fixed
AppStream-9.4.0.Z.EUS:firefox-0:140.9.0-1.el9_4.aarch64
AppStream-9.4.0.Z.EUS:firefox-0:140.9.0-1.el9_4.ppc64le
AppStream-9.4.0.Z.EUS:firefox-0:140.9.0-1.el9_4.s390x
AppStream-9.4.0.Z.EUS:firefox-0:140.9.0-1.el9_4.src
AppStream-9.4.0.Z.EUS:firefox-0:140.9.0-1.el9_4.x86_64
AppStream-9.4.0.Z.EUS:firefox-debuginfo-0:140.9.0-1.el9_4.aarch64
AppStream-9.4.0.Z.EUS:firefox-debuginfo-0:140.9.0-1.el9_4.ppc64le
AppStream-9.4.0.Z.EUS:firefox-debuginfo-0:140.9.0-1.el9_4.s390x
AppStream-9.4.0.Z.EUS:firefox-debuginfo-0:140.9.0-1.el9_4.x86_64
AppStream-9.4.0.Z.EUS:firefox-debugsource-0:140.9.0-1.el9_4.aarch64
AppStream-9.4.0.Z.EUS:firefox-debugsource-0:140.9.0-1.el9_4.ppc64le
AppStream-9.4.0.Z.EUS:firefox-debugsource-0:140.9.0-1.el9_4.s390x
AppStream-9.4.0.Z.EUS:firefox-debugsource-0:140.9.0-1.el9_4.x86_64
AppStream-9.4.0.Z.EUS:firefox-x11-0:140.9.0-1.el9_4.aarch64
AppStream-9.4.0.Z.EUS:firefox-x11-0:140.9.0-1.el9_4.ppc64le
AppStream-9.4.0.Z.EUS:firefox-x11-0:140.9.0-1.el9_4.s390x
AppStream-9.4.0.Z.EUS:firefox-x11-0:140.9.0-1.el9_4.x86_64
Threats
Impact
Moderate
A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: Privilege escalation in the Netmonitor component
6.1 (Medium)
Vendor Fix
For details on how to apply this update, which includes the changes described in this advisory, refer to:
https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2026:7845
Product status
Fixed
AppStream-9.4.0.Z.EUS:firefox-0:140.9.0-1.el9_4.aarch64
AppStream-9.4.0.Z.EUS:firefox-0:140.9.0-1.el9_4.ppc64le
AppStream-9.4.0.Z.EUS:firefox-0:140.9.0-1.el9_4.s390x
AppStream-9.4.0.Z.EUS:firefox-0:140.9.0-1.el9_4.src
AppStream-9.4.0.Z.EUS:firefox-0:140.9.0-1.el9_4.x86_64
AppStream-9.4.0.Z.EUS:firefox-debuginfo-0:140.9.0-1.el9_4.aarch64
AppStream-9.4.0.Z.EUS:firefox-debuginfo-0:140.9.0-1.el9_4.ppc64le
AppStream-9.4.0.Z.EUS:firefox-debuginfo-0:140.9.0-1.el9_4.s390x
AppStream-9.4.0.Z.EUS:firefox-debuginfo-0:140.9.0-1.el9_4.x86_64
AppStream-9.4.0.Z.EUS:firefox-debugsource-0:140.9.0-1.el9_4.aarch64
AppStream-9.4.0.Z.EUS:firefox-debugsource-0:140.9.0-1.el9_4.ppc64le
AppStream-9.4.0.Z.EUS:firefox-debugsource-0:140.9.0-1.el9_4.s390x
AppStream-9.4.0.Z.EUS:firefox-debugsource-0:140.9.0-1.el9_4.x86_64
AppStream-9.4.0.Z.EUS:firefox-x11-0:140.9.0-1.el9_4.aarch64
AppStream-9.4.0.Z.EUS:firefox-x11-0:140.9.0-1.el9_4.ppc64le
AppStream-9.4.0.Z.EUS:firefox-x11-0:140.9.0-1.el9_4.s390x
AppStream-9.4.0.Z.EUS:firefox-x11-0:140.9.0-1.el9_4.x86_64
Threats
Impact
Moderate
A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: Undefined behavior in the WebRTC: Signaling component
CWE-475 - Undefined Behavior for Input to API
Vendor Fix
For details on how to apply this update, which includes the changes described in this advisory, refer to:
https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2026:7845
Product status
Fixed
AppStream-9.4.0.Z.EUS:firefox-0:140.9.0-1.el9_4.aarch64
AppStream-9.4.0.Z.EUS:firefox-0:140.9.0-1.el9_4.ppc64le
AppStream-9.4.0.Z.EUS:firefox-0:140.9.0-1.el9_4.s390x
AppStream-9.4.0.Z.EUS:firefox-0:140.9.0-1.el9_4.src
AppStream-9.4.0.Z.EUS:firefox-0:140.9.0-1.el9_4.x86_64
AppStream-9.4.0.Z.EUS:firefox-debuginfo-0:140.9.0-1.el9_4.aarch64
AppStream-9.4.0.Z.EUS:firefox-debuginfo-0:140.9.0-1.el9_4.ppc64le
AppStream-9.4.0.Z.EUS:firefox-debuginfo-0:140.9.0-1.el9_4.s390x
AppStream-9.4.0.Z.EUS:firefox-debuginfo-0:140.9.0-1.el9_4.x86_64
AppStream-9.4.0.Z.EUS:firefox-debugsource-0:140.9.0-1.el9_4.aarch64
AppStream-9.4.0.Z.EUS:firefox-debugsource-0:140.9.0-1.el9_4.ppc64le
AppStream-9.4.0.Z.EUS:firefox-debugsource-0:140.9.0-1.el9_4.s390x
AppStream-9.4.0.Z.EUS:firefox-debugsource-0:140.9.0-1.el9_4.x86_64
AppStream-9.4.0.Z.EUS:firefox-x11-0:140.9.0-1.el9_4.aarch64
AppStream-9.4.0.Z.EUS:firefox-x11-0:140.9.0-1.el9_4.ppc64le
AppStream-9.4.0.Z.EUS:firefox-x11-0:140.9.0-1.el9_4.s390x
AppStream-9.4.0.Z.EUS:firefox-x11-0:140.9.0-1.el9_4.x86_64
Threats
Impact
Low
A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: Incorrect boundary conditions in the Graphics: Text component
CWE-805 - Buffer Access with Incorrect Length Value
Vendor Fix
For details on how to apply this update, which includes the changes described in this advisory, refer to:
https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2026:7845
Product status
Fixed
AppStream-9.4.0.Z.EUS:firefox-0:140.9.0-1.el9_4.aarch64
AppStream-9.4.0.Z.EUS:firefox-0:140.9.0-1.el9_4.ppc64le
AppStream-9.4.0.Z.EUS:firefox-0:140.9.0-1.el9_4.s390x
AppStream-9.4.0.Z.EUS:firefox-0:140.9.0-1.el9_4.src
AppStream-9.4.0.Z.EUS:firefox-0:140.9.0-1.el9_4.x86_64
AppStream-9.4.0.Z.EUS:firefox-debuginfo-0:140.9.0-1.el9_4.aarch64
AppStream-9.4.0.Z.EUS:firefox-debuginfo-0:140.9.0-1.el9_4.ppc64le
AppStream-9.4.0.Z.EUS:firefox-debuginfo-0:140.9.0-1.el9_4.s390x
AppStream-9.4.0.Z.EUS:firefox-debuginfo-0:140.9.0-1.el9_4.x86_64
AppStream-9.4.0.Z.EUS:firefox-debugsource-0:140.9.0-1.el9_4.aarch64
AppStream-9.4.0.Z.EUS:firefox-debugsource-0:140.9.0-1.el9_4.ppc64le
AppStream-9.4.0.Z.EUS:firefox-debugsource-0:140.9.0-1.el9_4.s390x
AppStream-9.4.0.Z.EUS:firefox-debugsource-0:140.9.0-1.el9_4.x86_64
AppStream-9.4.0.Z.EUS:firefox-x11-0:140.9.0-1.el9_4.aarch64
AppStream-9.4.0.Z.EUS:firefox-x11-0:140.9.0-1.el9_4.ppc64le
AppStream-9.4.0.Z.EUS:firefox-x11-0:140.9.0-1.el9_4.s390x
AppStream-9.4.0.Z.EUS:firefox-x11-0:140.9.0-1.el9_4.x86_64
Threats
Impact
Low
A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: Memory safety bugs present in Firefox ESR 140.8, Thunderbird ESR 140.8, Firefox 148 and Thunderbird 148. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code.
7.5 (High)
Vendor Fix
For details on how to apply this update, which includes the changes described in this advisory, refer to:
https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2026:7845
Product status
Fixed
AppStream-9.4.0.Z.EUS:firefox-0:140.9.0-1.el9_4.aarch64
AppStream-9.4.0.Z.EUS:firefox-0:140.9.0-1.el9_4.ppc64le
AppStream-9.4.0.Z.EUS:firefox-0:140.9.0-1.el9_4.s390x
AppStream-9.4.0.Z.EUS:firefox-0:140.9.0-1.el9_4.src
AppStream-9.4.0.Z.EUS:firefox-0:140.9.0-1.el9_4.x86_64
AppStream-9.4.0.Z.EUS:firefox-debuginfo-0:140.9.0-1.el9_4.aarch64
AppStream-9.4.0.Z.EUS:firefox-debuginfo-0:140.9.0-1.el9_4.ppc64le
AppStream-9.4.0.Z.EUS:firefox-debuginfo-0:140.9.0-1.el9_4.s390x
AppStream-9.4.0.Z.EUS:firefox-debuginfo-0:140.9.0-1.el9_4.x86_64
AppStream-9.4.0.Z.EUS:firefox-debugsource-0:140.9.0-1.el9_4.aarch64
AppStream-9.4.0.Z.EUS:firefox-debugsource-0:140.9.0-1.el9_4.ppc64le
AppStream-9.4.0.Z.EUS:firefox-debugsource-0:140.9.0-1.el9_4.s390x
AppStream-9.4.0.Z.EUS:firefox-debugsource-0:140.9.0-1.el9_4.x86_64
AppStream-9.4.0.Z.EUS:firefox-x11-0:140.9.0-1.el9_4.aarch64
AppStream-9.4.0.Z.EUS:firefox-x11-0:140.9.0-1.el9_4.ppc64le
AppStream-9.4.0.Z.EUS:firefox-x11-0:140.9.0-1.el9_4.s390x
AppStream-9.4.0.Z.EUS:firefox-x11-0:140.9.0-1.el9_4.x86_64
Threats
Impact
Important
A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: Memory safety bugs present in Firefox ESR 115.33, Firefox ESR 140.8, Thunderbird ESR 140.8, Firefox 148 and Thunderbird 148. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code.
7.5 (High)
Vendor Fix
For details on how to apply this update, which includes the changes described in this advisory, refer to:
https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2026:7845
Product status
Fixed
AppStream-9.4.0.Z.EUS:firefox-0:140.9.0-1.el9_4.aarch64
AppStream-9.4.0.Z.EUS:firefox-0:140.9.0-1.el9_4.ppc64le
AppStream-9.4.0.Z.EUS:firefox-0:140.9.0-1.el9_4.s390x
AppStream-9.4.0.Z.EUS:firefox-0:140.9.0-1.el9_4.src
AppStream-9.4.0.Z.EUS:firefox-0:140.9.0-1.el9_4.x86_64
AppStream-9.4.0.Z.EUS:firefox-debuginfo-0:140.9.0-1.el9_4.aarch64
AppStream-9.4.0.Z.EUS:firefox-debuginfo-0:140.9.0-1.el9_4.ppc64le
AppStream-9.4.0.Z.EUS:firefox-debuginfo-0:140.9.0-1.el9_4.s390x
AppStream-9.4.0.Z.EUS:firefox-debuginfo-0:140.9.0-1.el9_4.x86_64
AppStream-9.4.0.Z.EUS:firefox-debugsource-0:140.9.0-1.el9_4.aarch64
AppStream-9.4.0.Z.EUS:firefox-debugsource-0:140.9.0-1.el9_4.ppc64le
AppStream-9.4.0.Z.EUS:firefox-debugsource-0:140.9.0-1.el9_4.s390x
AppStream-9.4.0.Z.EUS:firefox-debugsource-0:140.9.0-1.el9_4.x86_64
AppStream-9.4.0.Z.EUS:firefox-x11-0:140.9.0-1.el9_4.aarch64
AppStream-9.4.0.Z.EUS:firefox-x11-0:140.9.0-1.el9_4.ppc64le
AppStream-9.4.0.Z.EUS:firefox-x11-0:140.9.0-1.el9_4.s390x
AppStream-9.4.0.Z.EUS:firefox-x11-0:140.9.0-1.el9_4.x86_64
Threats
Impact
Important
References
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"text": "Mozilla Firefox is an open-source web browser, designed for standards compliance, performance, and portability.\n\nSecurity Fix(es):\n\n* firefox: thunderbird: Use-after-free in the JavaScript Engine component (CVE-2026-4701)\n\n* firefox: thunderbird: Memory safety bugs fixed in Firefox ESR 115.34, Firefox ESR 140.9, Thunderbird ESR 140.9, Firefox 149 and Thunderbird 149 (CVE-2026-4721)\n\n* firefox: thunderbird: Privilege escalation in the Netmonitor component (CVE-2026-4717)\n\n* firefox: thunderbird: Sandbox escape due to use-after-free in the Disability Access APIs component (CVE-2026-4688)\n\n* firefox: thunderbird: Incorrect boundary conditions in the Graphics: Canvas2D component (CVE-2026-4706)\n\n* firefox: thunderbird: Incorrect boundary conditions in the Audio/Video: Web Codecs component (CVE-2026-4695)\n\n* firefox: thunderbird: Sandbox escape due to incorrect boundary conditions, integer overflow in the XPCOM component (CVE-2026-4689)\n\n* firefox: thunderbird: JIT miscompilation in the JavaScript Engine: JIT component (CVE-2026-4698)\n\n* firefox: thunderbird: Incorrect boundary conditions, uninitialized memory in the JavaScript Engine component (CVE-2026-4716)\n\n* firefox: thunderbird: Race condition, use-after-free in the Graphics: WebRender component (CVE-2026-4684)\n\n* firefox: thunderbird: Undefined behavior in the WebRTC: Signaling component (CVE-2026-4705)\n\n* firefox: thunderbird: Uninitialized memory in the Graphics: Canvas2D component (CVE-2026-4715)\n\n* firefox: thunderbird: Incorrect boundary conditions in the Graphics: Canvas2D component (CVE-2026-4685)\n\n* firefox: thunderbird: Incorrect boundary conditions in the Audio/Video component (CVE-2026-4714)\n\n* firefox: thunderbird: Incorrect boundary conditions in the Audio/Video: GMP component (CVE-2026-4709)\n\n* firefox: thunderbird: Incorrect boundary conditions in the Audio/Video component (CVE-2026-4710)\n\n* firefox: thunderbird: Information disclosure in the Widget: Cocoa component (CVE-2026-4712)\n\n* firefox: thunderbird: Incorrect boundary conditions in the Audio/Video: Web Codecs component (CVE-2026-4697)\n\n* firefox: thunderbird: Incorrect boundary conditions in the Graphics component (CVE-2026-4713)\n\n* firefox: thunderbird: Sandbox escape due to incorrect boundary conditions, integer overflow in the XPCOM component (CVE-2026-4690)\n\n* firefox: thunderbird: Use-after-free in the Widget: Cocoa component (CVE-2026-4711)\n\n* firefox: thunderbird: Incorrect boundary conditions in the Graphics: Canvas2D component (CVE-2026-4686)\n\n* firefox: thunderbird: Incorrect boundary conditions in the Graphics component (CVE-2026-4708)\n\n* firefox: thunderbird: Use-after-free in the CSS Parsing and Computation component (CVE-2026-4691)\n\n* firefox: thunderbird: Incorrect boundary conditions in the Layout: Text and Fonts component (CVE-2026-4699)\n\n* firefox: thunderbird: Use-after-free in the Layout: Text and Fonts component (CVE-2026-4696)\n\n* firefox: thunderbird: Incorrect boundary conditions in the Audio/Video: Playback component (CVE-2026-4693)\n\n* firefox: thunderbird: Undefined behavior in the WebRTC: Signaling component (CVE-2026-4718)\n\n* firefox: thunderbird: JIT miscompilation in the JavaScript Engine component (CVE-2026-4702)\n\n* firefox: thunderbird: Incorrect boundary conditions in the Graphics: Text component (CVE-2026-4719)\n\n* firefox: thunderbird: Incorrect boundary conditions, integer overflow in the Graphics component (CVE-2026-4694)\n\n* firefox: thunderbird: Sandbox escape in the Responsive Design Mode component (CVE-2026-4692)\n\n* firefox: thunderbird: Memory safety bugs fixed in Firefox ESR 140.9, Thunderbird ESR 140.9, Firefox 149 and Thunderbird 149 (CVE-2026-4720)\n\n* firefox: thunderbird: Mitigation bypass in the Networking: HTTP component (CVE-2026-4700)\n\n* firefox: thunderbird: Incorrect boundary conditions in the Graphics: Canvas2D component (CVE-2026-4707)\n\n* firefox: thunderbird: Denial-of-service in the WebRTC: Signaling component (CVE-2026-4704)\n\n* firefox: thunderbird: Sandbox escape due to incorrect boundary conditions in the Telemetry component (CVE-2026-4687)\n\nFor more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.",
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],
"restart_required": {
"category": "none"
},
"url": "https://access.redhat.com/errata/RHSA-2026:7845"
}
],
"scores": [
{
"cvss_v3": {
"attackComplexity": "HIGH",
"attackVector": "NETWORK",
"availabilityImpact": "HIGH",
"baseScore": 7.5,
"baseSeverity": "HIGH",
"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "REQUIRED",
"vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H",
"version": "3.1"
},
"products": [
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]
}
],
"threats": [
{
"category": "impact",
"details": "Important"
}
],
"title": "firefox: thunderbird: Memory safety bugs fixed in Firefox ESR 115.34, Firefox ESR 140.9, Thunderbird ESR 140.9, Firefox 149 and Thunderbird 149"
}
]
}
RHSA-2026:8287
Vulnerability from csaf_redhat - Published: 2026-04-15 10:42 - Updated: 2026-04-28 18:40Summary
Red Hat Security Advisory: thunderbird security update
Severity
Important
Notes
Topic: An update for thunderbird is now available for Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions.
Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.
Details: Mozilla Thunderbird is a standalone mail and newsgroup client.
Security Fix(es):
* firefox: thunderbird: Use-after-free in the JavaScript Engine component (CVE-2026-4701)
* firefox: thunderbird: Memory safety bugs fixed in Firefox ESR 115.34, Firefox ESR 140.9, Thunderbird ESR 140.9, Firefox 149 and Thunderbird 149 (CVE-2026-4721)
* firefox: thunderbird: Privilege escalation in the Netmonitor component (CVE-2026-4717)
* firefox: thunderbird: Sandbox escape due to use-after-free in the Disability Access APIs component (CVE-2026-4688)
* firefox: thunderbird: Incorrect boundary conditions in the Graphics: Canvas2D component (CVE-2026-4706)
* firefox: thunderbird: Incorrect boundary conditions in the Audio/Video: Web Codecs component (CVE-2026-4695)
* firefox: thunderbird: Sandbox escape due to incorrect boundary conditions, integer overflow in the XPCOM component (CVE-2026-4689)
* firefox: thunderbird: JIT miscompilation in the JavaScript Engine: JIT component (CVE-2026-4698)
* firefox: thunderbird: Incorrect boundary conditions, uninitialized memory in the JavaScript Engine component (CVE-2026-4716)
* firefox: thunderbird: Race condition, use-after-free in the Graphics: WebRender component (CVE-2026-4684)
* firefox: thunderbird: Undefined behavior in the WebRTC: Signaling component (CVE-2026-4705)
* firefox: thunderbird: Uninitialized memory in the Graphics: Canvas2D component (CVE-2026-4715)
* firefox: thunderbird: Incorrect boundary conditions in the Graphics: Canvas2D component (CVE-2026-4685)
* firefox: thunderbird: Incorrect boundary conditions in the Audio/Video component (CVE-2026-4714)
* firefox: thunderbird: Incorrect boundary conditions in the Audio/Video: GMP component (CVE-2026-4709)
* firefox: thunderbird: Incorrect boundary conditions in the Audio/Video component (CVE-2026-4710)
* firefox: thunderbird: Information disclosure in the Widget: Cocoa component (CVE-2026-4712)
* firefox: thunderbird: Incorrect boundary conditions in the Audio/Video: Web Codecs component (CVE-2026-4697)
* firefox: thunderbird: Incorrect boundary conditions in the Graphics component (CVE-2026-4713)
* firefox: thunderbird: Sandbox escape due to incorrect boundary conditions, integer overflow in the XPCOM component (CVE-2026-4690)
* firefox: thunderbird: Use-after-free in the Widget: Cocoa component (CVE-2026-4711)
* firefox: thunderbird: Incorrect boundary conditions in the Graphics: Canvas2D component (CVE-2026-4686)
* firefox: thunderbird: Incorrect boundary conditions in the Graphics component (CVE-2026-4708)
* firefox: thunderbird: Use-after-free in the CSS Parsing and Computation component (CVE-2026-4691)
* firefox: thunderbird: Incorrect boundary conditions in the Layout: Text and Fonts component (CVE-2026-4699)
* firefox: thunderbird: Use-after-free in the Layout: Text and Fonts component (CVE-2026-4696)
* firefox: thunderbird: Incorrect boundary conditions in the Audio/Video: Playback component (CVE-2026-4693)
* firefox: thunderbird: Undefined behavior in the WebRTC: Signaling component (CVE-2026-4718)
* firefox: thunderbird: JIT miscompilation in the JavaScript Engine component (CVE-2026-4702)
* firefox: thunderbird: Incorrect boundary conditions in the Graphics: Text component (CVE-2026-4719)
* firefox: thunderbird: Incorrect boundary conditions, integer overflow in the Graphics component (CVE-2026-4694)
* firefox: thunderbird: Sandbox escape in the Responsive Design Mode component (CVE-2026-4692)
* firefox: thunderbird: Memory safety bugs fixed in Firefox ESR 140.9, Thunderbird ESR 140.9, Firefox 149 and Thunderbird 149 (CVE-2026-4720)
* firefox: thunderbird: Mitigation bypass in the Networking: HTTP component (CVE-2026-4700)
* firefox: thunderbird: Incorrect boundary conditions in the Graphics: Canvas2D component (CVE-2026-4707)
* firefox: thunderbird: Denial-of-service in the WebRTC: Signaling component (CVE-2026-4704)
* firefox: thunderbird: Sandbox escape due to incorrect boundary conditions in the Telemetry component (CVE-2026-4687)
* thunderbird: Out of bounds read in IMAP parsing (CVE-2026-4371)
* thunderbird: Spoofing issue in Thunderbird (CVE-2026-3889)
For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.
Terms of Use: This content is licensed under the Creative Commons Attribution 4.0 International License (https://creativecommons.org/licenses/by/4.0/). If you distribute this content, or a modified version of it, you must provide attribution to Red Hat Inc. and provide a link to the original.
A flaw was found in Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: Spoofing issue in Thunderbird
5.4 (Medium)
Vendor Fix
For details on how to apply this update, which includes the changes described in this advisory, refer to:
https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2026:8287
Workaround
Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability.
Product status
Fixed
AppStream-9.2.0.Z.E4S:thunderbird-0:140.9.0-1.el9_2.aarch64
AppStream-9.2.0.Z.E4S:thunderbird-0:140.9.0-1.el9_2.ppc64le
AppStream-9.2.0.Z.E4S:thunderbird-0:140.9.0-1.el9_2.s390x
AppStream-9.2.0.Z.E4S:thunderbird-0:140.9.0-1.el9_2.src
AppStream-9.2.0.Z.E4S:thunderbird-0:140.9.0-1.el9_2.x86_64
AppStream-9.2.0.Z.E4S:thunderbird-debuginfo-0:140.9.0-1.el9_2.aarch64
AppStream-9.2.0.Z.E4S:thunderbird-debuginfo-0:140.9.0-1.el9_2.ppc64le
AppStream-9.2.0.Z.E4S:thunderbird-debuginfo-0:140.9.0-1.el9_2.s390x
AppStream-9.2.0.Z.E4S:thunderbird-debuginfo-0:140.9.0-1.el9_2.x86_64
AppStream-9.2.0.Z.E4S:thunderbird-debugsource-0:140.9.0-1.el9_2.aarch64
AppStream-9.2.0.Z.E4S:thunderbird-debugsource-0:140.9.0-1.el9_2.ppc64le
AppStream-9.2.0.Z.E4S:thunderbird-debugsource-0:140.9.0-1.el9_2.s390x
AppStream-9.2.0.Z.E4S:thunderbird-debugsource-0:140.9.0-1.el9_2.x86_64
Threats
Impact
Low
A flaw was found in Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: A malicious mail server could send malformed strings with negative lengths, causing the parser to read memory outside the buffer. If a mail server or connection to a mail server were compromised, an attacker could cause the parser to malfunction, potentially crashing Thunderbird or leaking sensitive data.
8.2 (High)
Vendor Fix
For details on how to apply this update, which includes the changes described in this advisory, refer to:
https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2026:8287
Workaround
Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability.
Product status
Fixed
AppStream-9.2.0.Z.E4S:thunderbird-0:140.9.0-1.el9_2.aarch64
AppStream-9.2.0.Z.E4S:thunderbird-0:140.9.0-1.el9_2.ppc64le
AppStream-9.2.0.Z.E4S:thunderbird-0:140.9.0-1.el9_2.s390x
AppStream-9.2.0.Z.E4S:thunderbird-0:140.9.0-1.el9_2.src
AppStream-9.2.0.Z.E4S:thunderbird-0:140.9.0-1.el9_2.x86_64
AppStream-9.2.0.Z.E4S:thunderbird-debuginfo-0:140.9.0-1.el9_2.aarch64
AppStream-9.2.0.Z.E4S:thunderbird-debuginfo-0:140.9.0-1.el9_2.ppc64le
AppStream-9.2.0.Z.E4S:thunderbird-debuginfo-0:140.9.0-1.el9_2.s390x
AppStream-9.2.0.Z.E4S:thunderbird-debuginfo-0:140.9.0-1.el9_2.x86_64
AppStream-9.2.0.Z.E4S:thunderbird-debugsource-0:140.9.0-1.el9_2.aarch64
AppStream-9.2.0.Z.E4S:thunderbird-debugsource-0:140.9.0-1.el9_2.ppc64le
AppStream-9.2.0.Z.E4S:thunderbird-debugsource-0:140.9.0-1.el9_2.s390x
AppStream-9.2.0.Z.E4S:thunderbird-debugsource-0:140.9.0-1.el9_2.x86_64
Threats
Impact
Important
A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: Race condition, use-after-free in the Graphics: WebRender component
7.5 (High)
Vendor Fix
For details on how to apply this update, which includes the changes described in this advisory, refer to:
https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2026:8287
Product status
Fixed
AppStream-9.2.0.Z.E4S:thunderbird-0:140.9.0-1.el9_2.aarch64
AppStream-9.2.0.Z.E4S:thunderbird-0:140.9.0-1.el9_2.ppc64le
AppStream-9.2.0.Z.E4S:thunderbird-0:140.9.0-1.el9_2.s390x
AppStream-9.2.0.Z.E4S:thunderbird-0:140.9.0-1.el9_2.src
AppStream-9.2.0.Z.E4S:thunderbird-0:140.9.0-1.el9_2.x86_64
AppStream-9.2.0.Z.E4S:thunderbird-debuginfo-0:140.9.0-1.el9_2.aarch64
AppStream-9.2.0.Z.E4S:thunderbird-debuginfo-0:140.9.0-1.el9_2.ppc64le
AppStream-9.2.0.Z.E4S:thunderbird-debuginfo-0:140.9.0-1.el9_2.s390x
AppStream-9.2.0.Z.E4S:thunderbird-debuginfo-0:140.9.0-1.el9_2.x86_64
AppStream-9.2.0.Z.E4S:thunderbird-debugsource-0:140.9.0-1.el9_2.aarch64
AppStream-9.2.0.Z.E4S:thunderbird-debugsource-0:140.9.0-1.el9_2.ppc64le
AppStream-9.2.0.Z.E4S:thunderbird-debugsource-0:140.9.0-1.el9_2.s390x
AppStream-9.2.0.Z.E4S:thunderbird-debugsource-0:140.9.0-1.el9_2.x86_64
Threats
Impact
Important
A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: Incorrect boundary conditions in the Graphics: Canvas2D component
7.5 (High)
Vendor Fix
For details on how to apply this update, which includes the changes described in this advisory, refer to:
https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2026:8287
Product status
Fixed
AppStream-9.2.0.Z.E4S:thunderbird-0:140.9.0-1.el9_2.aarch64
AppStream-9.2.0.Z.E4S:thunderbird-0:140.9.0-1.el9_2.ppc64le
AppStream-9.2.0.Z.E4S:thunderbird-0:140.9.0-1.el9_2.s390x
AppStream-9.2.0.Z.E4S:thunderbird-0:140.9.0-1.el9_2.src
AppStream-9.2.0.Z.E4S:thunderbird-0:140.9.0-1.el9_2.x86_64
AppStream-9.2.0.Z.E4S:thunderbird-debuginfo-0:140.9.0-1.el9_2.aarch64
AppStream-9.2.0.Z.E4S:thunderbird-debuginfo-0:140.9.0-1.el9_2.ppc64le
AppStream-9.2.0.Z.E4S:thunderbird-debuginfo-0:140.9.0-1.el9_2.s390x
AppStream-9.2.0.Z.E4S:thunderbird-debuginfo-0:140.9.0-1.el9_2.x86_64
AppStream-9.2.0.Z.E4S:thunderbird-debugsource-0:140.9.0-1.el9_2.aarch64
AppStream-9.2.0.Z.E4S:thunderbird-debugsource-0:140.9.0-1.el9_2.ppc64le
AppStream-9.2.0.Z.E4S:thunderbird-debugsource-0:140.9.0-1.el9_2.s390x
AppStream-9.2.0.Z.E4S:thunderbird-debugsource-0:140.9.0-1.el9_2.x86_64
Threats
Impact
Important
A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: Incorrect boundary conditions in the Graphics: Canvas2D component
7.5 (High)
Vendor Fix
For details on how to apply this update, which includes the changes described in this advisory, refer to:
https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2026:8287
Product status
Fixed
AppStream-9.2.0.Z.E4S:thunderbird-0:140.9.0-1.el9_2.aarch64
AppStream-9.2.0.Z.E4S:thunderbird-0:140.9.0-1.el9_2.ppc64le
AppStream-9.2.0.Z.E4S:thunderbird-0:140.9.0-1.el9_2.s390x
AppStream-9.2.0.Z.E4S:thunderbird-0:140.9.0-1.el9_2.src
AppStream-9.2.0.Z.E4S:thunderbird-0:140.9.0-1.el9_2.x86_64
AppStream-9.2.0.Z.E4S:thunderbird-debuginfo-0:140.9.0-1.el9_2.aarch64
AppStream-9.2.0.Z.E4S:thunderbird-debuginfo-0:140.9.0-1.el9_2.ppc64le
AppStream-9.2.0.Z.E4S:thunderbird-debuginfo-0:140.9.0-1.el9_2.s390x
AppStream-9.2.0.Z.E4S:thunderbird-debuginfo-0:140.9.0-1.el9_2.x86_64
AppStream-9.2.0.Z.E4S:thunderbird-debugsource-0:140.9.0-1.el9_2.aarch64
AppStream-9.2.0.Z.E4S:thunderbird-debugsource-0:140.9.0-1.el9_2.ppc64le
AppStream-9.2.0.Z.E4S:thunderbird-debugsource-0:140.9.0-1.el9_2.s390x
AppStream-9.2.0.Z.E4S:thunderbird-debugsource-0:140.9.0-1.el9_2.x86_64
Threats
Impact
Important
A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: Sandbox escape due to incorrect boundary conditions in the Telemetry component
7.5 (High)
Vendor Fix
For details on how to apply this update, which includes the changes described in this advisory, refer to:
https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2026:8287
Product status
Fixed
AppStream-9.2.0.Z.E4S:thunderbird-0:140.9.0-1.el9_2.aarch64
AppStream-9.2.0.Z.E4S:thunderbird-0:140.9.0-1.el9_2.ppc64le
AppStream-9.2.0.Z.E4S:thunderbird-0:140.9.0-1.el9_2.s390x
AppStream-9.2.0.Z.E4S:thunderbird-0:140.9.0-1.el9_2.src
AppStream-9.2.0.Z.E4S:thunderbird-0:140.9.0-1.el9_2.x86_64
AppStream-9.2.0.Z.E4S:thunderbird-debuginfo-0:140.9.0-1.el9_2.aarch64
AppStream-9.2.0.Z.E4S:thunderbird-debuginfo-0:140.9.0-1.el9_2.ppc64le
AppStream-9.2.0.Z.E4S:thunderbird-debuginfo-0:140.9.0-1.el9_2.s390x
AppStream-9.2.0.Z.E4S:thunderbird-debuginfo-0:140.9.0-1.el9_2.x86_64
AppStream-9.2.0.Z.E4S:thunderbird-debugsource-0:140.9.0-1.el9_2.aarch64
AppStream-9.2.0.Z.E4S:thunderbird-debugsource-0:140.9.0-1.el9_2.ppc64le
AppStream-9.2.0.Z.E4S:thunderbird-debugsource-0:140.9.0-1.el9_2.s390x
AppStream-9.2.0.Z.E4S:thunderbird-debugsource-0:140.9.0-1.el9_2.x86_64
Threats
Impact
Important
A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: Sandbox escape due to use-after-free in the Disability Access APIs component
7.5 (High)
Vendor Fix
For details on how to apply this update, which includes the changes described in this advisory, refer to:
https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2026:8287
Product status
Fixed
AppStream-9.2.0.Z.E4S:thunderbird-0:140.9.0-1.el9_2.aarch64
AppStream-9.2.0.Z.E4S:thunderbird-0:140.9.0-1.el9_2.ppc64le
AppStream-9.2.0.Z.E4S:thunderbird-0:140.9.0-1.el9_2.s390x
AppStream-9.2.0.Z.E4S:thunderbird-0:140.9.0-1.el9_2.src
AppStream-9.2.0.Z.E4S:thunderbird-0:140.9.0-1.el9_2.x86_64
AppStream-9.2.0.Z.E4S:thunderbird-debuginfo-0:140.9.0-1.el9_2.aarch64
AppStream-9.2.0.Z.E4S:thunderbird-debuginfo-0:140.9.0-1.el9_2.ppc64le
AppStream-9.2.0.Z.E4S:thunderbird-debuginfo-0:140.9.0-1.el9_2.s390x
AppStream-9.2.0.Z.E4S:thunderbird-debuginfo-0:140.9.0-1.el9_2.x86_64
AppStream-9.2.0.Z.E4S:thunderbird-debugsource-0:140.9.0-1.el9_2.aarch64
AppStream-9.2.0.Z.E4S:thunderbird-debugsource-0:140.9.0-1.el9_2.ppc64le
AppStream-9.2.0.Z.E4S:thunderbird-debugsource-0:140.9.0-1.el9_2.s390x
AppStream-9.2.0.Z.E4S:thunderbird-debugsource-0:140.9.0-1.el9_2.x86_64
Threats
Impact
Important
A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: Sandbox escape due to incorrect boundary conditions, integer overflow in the XPCOM component
7.5 (High)
Vendor Fix
For details on how to apply this update, which includes the changes described in this advisory, refer to:
https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2026:8287
Product status
Fixed
AppStream-9.2.0.Z.E4S:thunderbird-0:140.9.0-1.el9_2.aarch64
AppStream-9.2.0.Z.E4S:thunderbird-0:140.9.0-1.el9_2.ppc64le
AppStream-9.2.0.Z.E4S:thunderbird-0:140.9.0-1.el9_2.s390x
AppStream-9.2.0.Z.E4S:thunderbird-0:140.9.0-1.el9_2.src
AppStream-9.2.0.Z.E4S:thunderbird-0:140.9.0-1.el9_2.x86_64
AppStream-9.2.0.Z.E4S:thunderbird-debuginfo-0:140.9.0-1.el9_2.aarch64
AppStream-9.2.0.Z.E4S:thunderbird-debuginfo-0:140.9.0-1.el9_2.ppc64le
AppStream-9.2.0.Z.E4S:thunderbird-debuginfo-0:140.9.0-1.el9_2.s390x
AppStream-9.2.0.Z.E4S:thunderbird-debuginfo-0:140.9.0-1.el9_2.x86_64
AppStream-9.2.0.Z.E4S:thunderbird-debugsource-0:140.9.0-1.el9_2.aarch64
AppStream-9.2.0.Z.E4S:thunderbird-debugsource-0:140.9.0-1.el9_2.ppc64le
AppStream-9.2.0.Z.E4S:thunderbird-debugsource-0:140.9.0-1.el9_2.s390x
AppStream-9.2.0.Z.E4S:thunderbird-debugsource-0:140.9.0-1.el9_2.x86_64
Threats
Impact
Important
A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: Sandbox escape due to incorrect boundary conditions, integer overflow in the XPCOM component
7.5 (High)
Vendor Fix
For details on how to apply this update, which includes the changes described in this advisory, refer to:
https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2026:8287
Product status
Fixed
AppStream-9.2.0.Z.E4S:thunderbird-0:140.9.0-1.el9_2.aarch64
AppStream-9.2.0.Z.E4S:thunderbird-0:140.9.0-1.el9_2.ppc64le
AppStream-9.2.0.Z.E4S:thunderbird-0:140.9.0-1.el9_2.s390x
AppStream-9.2.0.Z.E4S:thunderbird-0:140.9.0-1.el9_2.src
AppStream-9.2.0.Z.E4S:thunderbird-0:140.9.0-1.el9_2.x86_64
AppStream-9.2.0.Z.E4S:thunderbird-debuginfo-0:140.9.0-1.el9_2.aarch64
AppStream-9.2.0.Z.E4S:thunderbird-debuginfo-0:140.9.0-1.el9_2.ppc64le
AppStream-9.2.0.Z.E4S:thunderbird-debuginfo-0:140.9.0-1.el9_2.s390x
AppStream-9.2.0.Z.E4S:thunderbird-debuginfo-0:140.9.0-1.el9_2.x86_64
AppStream-9.2.0.Z.E4S:thunderbird-debugsource-0:140.9.0-1.el9_2.aarch64
AppStream-9.2.0.Z.E4S:thunderbird-debugsource-0:140.9.0-1.el9_2.ppc64le
AppStream-9.2.0.Z.E4S:thunderbird-debugsource-0:140.9.0-1.el9_2.s390x
AppStream-9.2.0.Z.E4S:thunderbird-debugsource-0:140.9.0-1.el9_2.x86_64
Threats
Impact
Important
A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: Use-after-free in the CSS Parsing and Computation component
7.5 (High)
Vendor Fix
For details on how to apply this update, which includes the changes described in this advisory, refer to:
https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2026:8287
Product status
Fixed
AppStream-9.2.0.Z.E4S:thunderbird-0:140.9.0-1.el9_2.aarch64
AppStream-9.2.0.Z.E4S:thunderbird-0:140.9.0-1.el9_2.ppc64le
AppStream-9.2.0.Z.E4S:thunderbird-0:140.9.0-1.el9_2.s390x
AppStream-9.2.0.Z.E4S:thunderbird-0:140.9.0-1.el9_2.src
AppStream-9.2.0.Z.E4S:thunderbird-0:140.9.0-1.el9_2.x86_64
AppStream-9.2.0.Z.E4S:thunderbird-debuginfo-0:140.9.0-1.el9_2.aarch64
AppStream-9.2.0.Z.E4S:thunderbird-debuginfo-0:140.9.0-1.el9_2.ppc64le
AppStream-9.2.0.Z.E4S:thunderbird-debuginfo-0:140.9.0-1.el9_2.s390x
AppStream-9.2.0.Z.E4S:thunderbird-debuginfo-0:140.9.0-1.el9_2.x86_64
AppStream-9.2.0.Z.E4S:thunderbird-debugsource-0:140.9.0-1.el9_2.aarch64
AppStream-9.2.0.Z.E4S:thunderbird-debugsource-0:140.9.0-1.el9_2.ppc64le
AppStream-9.2.0.Z.E4S:thunderbird-debugsource-0:140.9.0-1.el9_2.s390x
AppStream-9.2.0.Z.E4S:thunderbird-debugsource-0:140.9.0-1.el9_2.x86_64
Threats
Impact
Important
A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: Sandbox escape in the Responsive Design Mode component
7.5 (High)
Vendor Fix
For details on how to apply this update, which includes the changes described in this advisory, refer to:
https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2026:8287
Product status
Fixed
AppStream-9.2.0.Z.E4S:thunderbird-0:140.9.0-1.el9_2.aarch64
AppStream-9.2.0.Z.E4S:thunderbird-0:140.9.0-1.el9_2.ppc64le
AppStream-9.2.0.Z.E4S:thunderbird-0:140.9.0-1.el9_2.s390x
AppStream-9.2.0.Z.E4S:thunderbird-0:140.9.0-1.el9_2.src
AppStream-9.2.0.Z.E4S:thunderbird-0:140.9.0-1.el9_2.x86_64
AppStream-9.2.0.Z.E4S:thunderbird-debuginfo-0:140.9.0-1.el9_2.aarch64
AppStream-9.2.0.Z.E4S:thunderbird-debuginfo-0:140.9.0-1.el9_2.ppc64le
AppStream-9.2.0.Z.E4S:thunderbird-debuginfo-0:140.9.0-1.el9_2.s390x
AppStream-9.2.0.Z.E4S:thunderbird-debuginfo-0:140.9.0-1.el9_2.x86_64
AppStream-9.2.0.Z.E4S:thunderbird-debugsource-0:140.9.0-1.el9_2.aarch64
AppStream-9.2.0.Z.E4S:thunderbird-debugsource-0:140.9.0-1.el9_2.ppc64le
AppStream-9.2.0.Z.E4S:thunderbird-debugsource-0:140.9.0-1.el9_2.s390x
AppStream-9.2.0.Z.E4S:thunderbird-debugsource-0:140.9.0-1.el9_2.x86_64
Threats
Impact
Important
A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: Incorrect boundary conditions in the Audio/Video: Playback component
7.5 (High)
Vendor Fix
For details on how to apply this update, which includes the changes described in this advisory, refer to:
https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2026:8287
Product status
Fixed
AppStream-9.2.0.Z.E4S:thunderbird-0:140.9.0-1.el9_2.aarch64
AppStream-9.2.0.Z.E4S:thunderbird-0:140.9.0-1.el9_2.ppc64le
AppStream-9.2.0.Z.E4S:thunderbird-0:140.9.0-1.el9_2.s390x
AppStream-9.2.0.Z.E4S:thunderbird-0:140.9.0-1.el9_2.src
AppStream-9.2.0.Z.E4S:thunderbird-0:140.9.0-1.el9_2.x86_64
AppStream-9.2.0.Z.E4S:thunderbird-debuginfo-0:140.9.0-1.el9_2.aarch64
AppStream-9.2.0.Z.E4S:thunderbird-debuginfo-0:140.9.0-1.el9_2.ppc64le
AppStream-9.2.0.Z.E4S:thunderbird-debuginfo-0:140.9.0-1.el9_2.s390x
AppStream-9.2.0.Z.E4S:thunderbird-debuginfo-0:140.9.0-1.el9_2.x86_64
AppStream-9.2.0.Z.E4S:thunderbird-debugsource-0:140.9.0-1.el9_2.aarch64
AppStream-9.2.0.Z.E4S:thunderbird-debugsource-0:140.9.0-1.el9_2.ppc64le
AppStream-9.2.0.Z.E4S:thunderbird-debugsource-0:140.9.0-1.el9_2.s390x
AppStream-9.2.0.Z.E4S:thunderbird-debugsource-0:140.9.0-1.el9_2.x86_64
Threats
Impact
Important
A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: Incorrect boundary conditions, integer overflow in the Graphics component
7.5 (High)
Vendor Fix
For details on how to apply this update, which includes the changes described in this advisory, refer to:
https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2026:8287
Product status
Fixed
AppStream-9.2.0.Z.E4S:thunderbird-0:140.9.0-1.el9_2.aarch64
AppStream-9.2.0.Z.E4S:thunderbird-0:140.9.0-1.el9_2.ppc64le
AppStream-9.2.0.Z.E4S:thunderbird-0:140.9.0-1.el9_2.s390x
AppStream-9.2.0.Z.E4S:thunderbird-0:140.9.0-1.el9_2.src
AppStream-9.2.0.Z.E4S:thunderbird-0:140.9.0-1.el9_2.x86_64
AppStream-9.2.0.Z.E4S:thunderbird-debuginfo-0:140.9.0-1.el9_2.aarch64
AppStream-9.2.0.Z.E4S:thunderbird-debuginfo-0:140.9.0-1.el9_2.ppc64le
AppStream-9.2.0.Z.E4S:thunderbird-debuginfo-0:140.9.0-1.el9_2.s390x
AppStream-9.2.0.Z.E4S:thunderbird-debuginfo-0:140.9.0-1.el9_2.x86_64
AppStream-9.2.0.Z.E4S:thunderbird-debugsource-0:140.9.0-1.el9_2.aarch64
AppStream-9.2.0.Z.E4S:thunderbird-debugsource-0:140.9.0-1.el9_2.ppc64le
AppStream-9.2.0.Z.E4S:thunderbird-debugsource-0:140.9.0-1.el9_2.s390x
AppStream-9.2.0.Z.E4S:thunderbird-debugsource-0:140.9.0-1.el9_2.x86_64
Threats
Impact
Important
A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: Incorrect boundary conditions in the Audio/Video: Web Codecs component
7.5 (High)
Vendor Fix
For details on how to apply this update, which includes the changes described in this advisory, refer to:
https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2026:8287
Product status
Fixed
AppStream-9.2.0.Z.E4S:thunderbird-0:140.9.0-1.el9_2.aarch64
AppStream-9.2.0.Z.E4S:thunderbird-0:140.9.0-1.el9_2.ppc64le
AppStream-9.2.0.Z.E4S:thunderbird-0:140.9.0-1.el9_2.s390x
AppStream-9.2.0.Z.E4S:thunderbird-0:140.9.0-1.el9_2.src
AppStream-9.2.0.Z.E4S:thunderbird-0:140.9.0-1.el9_2.x86_64
AppStream-9.2.0.Z.E4S:thunderbird-debuginfo-0:140.9.0-1.el9_2.aarch64
AppStream-9.2.0.Z.E4S:thunderbird-debuginfo-0:140.9.0-1.el9_2.ppc64le
AppStream-9.2.0.Z.E4S:thunderbird-debuginfo-0:140.9.0-1.el9_2.s390x
AppStream-9.2.0.Z.E4S:thunderbird-debuginfo-0:140.9.0-1.el9_2.x86_64
AppStream-9.2.0.Z.E4S:thunderbird-debugsource-0:140.9.0-1.el9_2.aarch64
AppStream-9.2.0.Z.E4S:thunderbird-debugsource-0:140.9.0-1.el9_2.ppc64le
AppStream-9.2.0.Z.E4S:thunderbird-debugsource-0:140.9.0-1.el9_2.s390x
AppStream-9.2.0.Z.E4S:thunderbird-debugsource-0:140.9.0-1.el9_2.x86_64
Threats
Impact
Important
A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: Use-after-free in the Layout: Text and Fonts component
7.5 (High)
Vendor Fix
For details on how to apply this update, which includes the changes described in this advisory, refer to:
https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2026:8287
Product status
Fixed
AppStream-9.2.0.Z.E4S:thunderbird-0:140.9.0-1.el9_2.aarch64
AppStream-9.2.0.Z.E4S:thunderbird-0:140.9.0-1.el9_2.ppc64le
AppStream-9.2.0.Z.E4S:thunderbird-0:140.9.0-1.el9_2.s390x
AppStream-9.2.0.Z.E4S:thunderbird-0:140.9.0-1.el9_2.src
AppStream-9.2.0.Z.E4S:thunderbird-0:140.9.0-1.el9_2.x86_64
AppStream-9.2.0.Z.E4S:thunderbird-debuginfo-0:140.9.0-1.el9_2.aarch64
AppStream-9.2.0.Z.E4S:thunderbird-debuginfo-0:140.9.0-1.el9_2.ppc64le
AppStream-9.2.0.Z.E4S:thunderbird-debuginfo-0:140.9.0-1.el9_2.s390x
AppStream-9.2.0.Z.E4S:thunderbird-debuginfo-0:140.9.0-1.el9_2.x86_64
AppStream-9.2.0.Z.E4S:thunderbird-debugsource-0:140.9.0-1.el9_2.aarch64
AppStream-9.2.0.Z.E4S:thunderbird-debugsource-0:140.9.0-1.el9_2.ppc64le
AppStream-9.2.0.Z.E4S:thunderbird-debugsource-0:140.9.0-1.el9_2.s390x
AppStream-9.2.0.Z.E4S:thunderbird-debugsource-0:140.9.0-1.el9_2.x86_64
Threats
Impact
Important
A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: Incorrect boundary conditions in the Audio/Video: Web Codecs component
7.5 (High)
Vendor Fix
For details on how to apply this update, which includes the changes described in this advisory, refer to:
https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2026:8287
Product status
Fixed
AppStream-9.2.0.Z.E4S:thunderbird-0:140.9.0-1.el9_2.aarch64
AppStream-9.2.0.Z.E4S:thunderbird-0:140.9.0-1.el9_2.ppc64le
AppStream-9.2.0.Z.E4S:thunderbird-0:140.9.0-1.el9_2.s390x
AppStream-9.2.0.Z.E4S:thunderbird-0:140.9.0-1.el9_2.src
AppStream-9.2.0.Z.E4S:thunderbird-0:140.9.0-1.el9_2.x86_64
AppStream-9.2.0.Z.E4S:thunderbird-debuginfo-0:140.9.0-1.el9_2.aarch64
AppStream-9.2.0.Z.E4S:thunderbird-debuginfo-0:140.9.0-1.el9_2.ppc64le
AppStream-9.2.0.Z.E4S:thunderbird-debuginfo-0:140.9.0-1.el9_2.s390x
AppStream-9.2.0.Z.E4S:thunderbird-debuginfo-0:140.9.0-1.el9_2.x86_64
AppStream-9.2.0.Z.E4S:thunderbird-debugsource-0:140.9.0-1.el9_2.aarch64
AppStream-9.2.0.Z.E4S:thunderbird-debugsource-0:140.9.0-1.el9_2.ppc64le
AppStream-9.2.0.Z.E4S:thunderbird-debugsource-0:140.9.0-1.el9_2.s390x
AppStream-9.2.0.Z.E4S:thunderbird-debugsource-0:140.9.0-1.el9_2.x86_64
Threats
Impact
Important
A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: JIT miscompilation in the JavaScript Engine: JIT component
7.5 (High)
Vendor Fix
For details on how to apply this update, which includes the changes described in this advisory, refer to:
https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2026:8287
Product status
Fixed
AppStream-9.2.0.Z.E4S:thunderbird-0:140.9.0-1.el9_2.aarch64
AppStream-9.2.0.Z.E4S:thunderbird-0:140.9.0-1.el9_2.ppc64le
AppStream-9.2.0.Z.E4S:thunderbird-0:140.9.0-1.el9_2.s390x
AppStream-9.2.0.Z.E4S:thunderbird-0:140.9.0-1.el9_2.src
AppStream-9.2.0.Z.E4S:thunderbird-0:140.9.0-1.el9_2.x86_64
AppStream-9.2.0.Z.E4S:thunderbird-debuginfo-0:140.9.0-1.el9_2.aarch64
AppStream-9.2.0.Z.E4S:thunderbird-debuginfo-0:140.9.0-1.el9_2.ppc64le
AppStream-9.2.0.Z.E4S:thunderbird-debuginfo-0:140.9.0-1.el9_2.s390x
AppStream-9.2.0.Z.E4S:thunderbird-debuginfo-0:140.9.0-1.el9_2.x86_64
AppStream-9.2.0.Z.E4S:thunderbird-debugsource-0:140.9.0-1.el9_2.aarch64
AppStream-9.2.0.Z.E4S:thunderbird-debugsource-0:140.9.0-1.el9_2.ppc64le
AppStream-9.2.0.Z.E4S:thunderbird-debugsource-0:140.9.0-1.el9_2.s390x
AppStream-9.2.0.Z.E4S:thunderbird-debugsource-0:140.9.0-1.el9_2.x86_64
Threats
Impact
Important
A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: Incorrect boundary conditions in the Layout: Text and Fonts component
7.5 (High)
Vendor Fix
For details on how to apply this update, which includes the changes described in this advisory, refer to:
https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2026:8287
Product status
Fixed
AppStream-9.2.0.Z.E4S:thunderbird-0:140.9.0-1.el9_2.aarch64
AppStream-9.2.0.Z.E4S:thunderbird-0:140.9.0-1.el9_2.ppc64le
AppStream-9.2.0.Z.E4S:thunderbird-0:140.9.0-1.el9_2.s390x
AppStream-9.2.0.Z.E4S:thunderbird-0:140.9.0-1.el9_2.src
AppStream-9.2.0.Z.E4S:thunderbird-0:140.9.0-1.el9_2.x86_64
AppStream-9.2.0.Z.E4S:thunderbird-debuginfo-0:140.9.0-1.el9_2.aarch64
AppStream-9.2.0.Z.E4S:thunderbird-debuginfo-0:140.9.0-1.el9_2.ppc64le
AppStream-9.2.0.Z.E4S:thunderbird-debuginfo-0:140.9.0-1.el9_2.s390x
AppStream-9.2.0.Z.E4S:thunderbird-debuginfo-0:140.9.0-1.el9_2.x86_64
AppStream-9.2.0.Z.E4S:thunderbird-debugsource-0:140.9.0-1.el9_2.aarch64
AppStream-9.2.0.Z.E4S:thunderbird-debugsource-0:140.9.0-1.el9_2.ppc64le
AppStream-9.2.0.Z.E4S:thunderbird-debugsource-0:140.9.0-1.el9_2.s390x
AppStream-9.2.0.Z.E4S:thunderbird-debugsource-0:140.9.0-1.el9_2.x86_64
Threats
Impact
Important
A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: Mitigation bypass in the Networking: HTTP component
7.5 (High)
Vendor Fix
For details on how to apply this update, which includes the changes described in this advisory, refer to:
https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2026:8287
Product status
Fixed
AppStream-9.2.0.Z.E4S:thunderbird-0:140.9.0-1.el9_2.aarch64
AppStream-9.2.0.Z.E4S:thunderbird-0:140.9.0-1.el9_2.ppc64le
AppStream-9.2.0.Z.E4S:thunderbird-0:140.9.0-1.el9_2.s390x
AppStream-9.2.0.Z.E4S:thunderbird-0:140.9.0-1.el9_2.src
AppStream-9.2.0.Z.E4S:thunderbird-0:140.9.0-1.el9_2.x86_64
AppStream-9.2.0.Z.E4S:thunderbird-debuginfo-0:140.9.0-1.el9_2.aarch64
AppStream-9.2.0.Z.E4S:thunderbird-debuginfo-0:140.9.0-1.el9_2.ppc64le
AppStream-9.2.0.Z.E4S:thunderbird-debuginfo-0:140.9.0-1.el9_2.s390x
AppStream-9.2.0.Z.E4S:thunderbird-debuginfo-0:140.9.0-1.el9_2.x86_64
AppStream-9.2.0.Z.E4S:thunderbird-debugsource-0:140.9.0-1.el9_2.aarch64
AppStream-9.2.0.Z.E4S:thunderbird-debugsource-0:140.9.0-1.el9_2.ppc64le
AppStream-9.2.0.Z.E4S:thunderbird-debugsource-0:140.9.0-1.el9_2.s390x
AppStream-9.2.0.Z.E4S:thunderbird-debugsource-0:140.9.0-1.el9_2.x86_64
Threats
Impact
Important
A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: Use-after-free in the JavaScript Engine component
6.1 (Medium)
Vendor Fix
For details on how to apply this update, which includes the changes described in this advisory, refer to:
https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2026:8287
Product status
Fixed
AppStream-9.2.0.Z.E4S:thunderbird-0:140.9.0-1.el9_2.aarch64
AppStream-9.2.0.Z.E4S:thunderbird-0:140.9.0-1.el9_2.ppc64le
AppStream-9.2.0.Z.E4S:thunderbird-0:140.9.0-1.el9_2.s390x
AppStream-9.2.0.Z.E4S:thunderbird-0:140.9.0-1.el9_2.src
AppStream-9.2.0.Z.E4S:thunderbird-0:140.9.0-1.el9_2.x86_64
AppStream-9.2.0.Z.E4S:thunderbird-debuginfo-0:140.9.0-1.el9_2.aarch64
AppStream-9.2.0.Z.E4S:thunderbird-debuginfo-0:140.9.0-1.el9_2.ppc64le
AppStream-9.2.0.Z.E4S:thunderbird-debuginfo-0:140.9.0-1.el9_2.s390x
AppStream-9.2.0.Z.E4S:thunderbird-debuginfo-0:140.9.0-1.el9_2.x86_64
AppStream-9.2.0.Z.E4S:thunderbird-debugsource-0:140.9.0-1.el9_2.aarch64
AppStream-9.2.0.Z.E4S:thunderbird-debugsource-0:140.9.0-1.el9_2.ppc64le
AppStream-9.2.0.Z.E4S:thunderbird-debugsource-0:140.9.0-1.el9_2.s390x
AppStream-9.2.0.Z.E4S:thunderbird-debugsource-0:140.9.0-1.el9_2.x86_64
Threats
Impact
Moderate
A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: JIT miscompilation in the JavaScript Engine component
6.1 (Medium)
Vendor Fix
For details on how to apply this update, which includes the changes described in this advisory, refer to:
https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2026:8287
Product status
Fixed
AppStream-9.2.0.Z.E4S:thunderbird-0:140.9.0-1.el9_2.aarch64
AppStream-9.2.0.Z.E4S:thunderbird-0:140.9.0-1.el9_2.ppc64le
AppStream-9.2.0.Z.E4S:thunderbird-0:140.9.0-1.el9_2.s390x
AppStream-9.2.0.Z.E4S:thunderbird-0:140.9.0-1.el9_2.src
AppStream-9.2.0.Z.E4S:thunderbird-0:140.9.0-1.el9_2.x86_64
AppStream-9.2.0.Z.E4S:thunderbird-debuginfo-0:140.9.0-1.el9_2.aarch64
AppStream-9.2.0.Z.E4S:thunderbird-debuginfo-0:140.9.0-1.el9_2.ppc64le
AppStream-9.2.0.Z.E4S:thunderbird-debuginfo-0:140.9.0-1.el9_2.s390x
AppStream-9.2.0.Z.E4S:thunderbird-debuginfo-0:140.9.0-1.el9_2.x86_64
AppStream-9.2.0.Z.E4S:thunderbird-debugsource-0:140.9.0-1.el9_2.aarch64
AppStream-9.2.0.Z.E4S:thunderbird-debugsource-0:140.9.0-1.el9_2.ppc64le
AppStream-9.2.0.Z.E4S:thunderbird-debugsource-0:140.9.0-1.el9_2.s390x
AppStream-9.2.0.Z.E4S:thunderbird-debugsource-0:140.9.0-1.el9_2.x86_64
Threats
Impact
Moderate
A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: Denial-of-service in the WebRTC: Signaling component
7.5 (High)
Vendor Fix
For details on how to apply this update, which includes the changes described in this advisory, refer to:
https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2026:8287
Product status
Fixed
AppStream-9.2.0.Z.E4S:thunderbird-0:140.9.0-1.el9_2.aarch64
AppStream-9.2.0.Z.E4S:thunderbird-0:140.9.0-1.el9_2.ppc64le
AppStream-9.2.0.Z.E4S:thunderbird-0:140.9.0-1.el9_2.s390x
AppStream-9.2.0.Z.E4S:thunderbird-0:140.9.0-1.el9_2.src
AppStream-9.2.0.Z.E4S:thunderbird-0:140.9.0-1.el9_2.x86_64
AppStream-9.2.0.Z.E4S:thunderbird-debuginfo-0:140.9.0-1.el9_2.aarch64
AppStream-9.2.0.Z.E4S:thunderbird-debuginfo-0:140.9.0-1.el9_2.ppc64le
AppStream-9.2.0.Z.E4S:thunderbird-debuginfo-0:140.9.0-1.el9_2.s390x
AppStream-9.2.0.Z.E4S:thunderbird-debuginfo-0:140.9.0-1.el9_2.x86_64
AppStream-9.2.0.Z.E4S:thunderbird-debugsource-0:140.9.0-1.el9_2.aarch64
AppStream-9.2.0.Z.E4S:thunderbird-debugsource-0:140.9.0-1.el9_2.ppc64le
AppStream-9.2.0.Z.E4S:thunderbird-debugsource-0:140.9.0-1.el9_2.s390x
AppStream-9.2.0.Z.E4S:thunderbird-debugsource-0:140.9.0-1.el9_2.x86_64
Threats
Impact
Moderate
A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: Undefined behavior in the WebRTC: Signaling component
6.5 (Medium)
Vendor Fix
For details on how to apply this update, which includes the changes described in this advisory, refer to:
https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2026:8287
Product status
Fixed
AppStream-9.2.0.Z.E4S:thunderbird-0:140.9.0-1.el9_2.aarch64
AppStream-9.2.0.Z.E4S:thunderbird-0:140.9.0-1.el9_2.ppc64le
AppStream-9.2.0.Z.E4S:thunderbird-0:140.9.0-1.el9_2.s390x
AppStream-9.2.0.Z.E4S:thunderbird-0:140.9.0-1.el9_2.src
AppStream-9.2.0.Z.E4S:thunderbird-0:140.9.0-1.el9_2.x86_64
AppStream-9.2.0.Z.E4S:thunderbird-debuginfo-0:140.9.0-1.el9_2.aarch64
AppStream-9.2.0.Z.E4S:thunderbird-debuginfo-0:140.9.0-1.el9_2.ppc64le
AppStream-9.2.0.Z.E4S:thunderbird-debuginfo-0:140.9.0-1.el9_2.s390x
AppStream-9.2.0.Z.E4S:thunderbird-debuginfo-0:140.9.0-1.el9_2.x86_64
AppStream-9.2.0.Z.E4S:thunderbird-debugsource-0:140.9.0-1.el9_2.aarch64
AppStream-9.2.0.Z.E4S:thunderbird-debugsource-0:140.9.0-1.el9_2.ppc64le
AppStream-9.2.0.Z.E4S:thunderbird-debugsource-0:140.9.0-1.el9_2.s390x
AppStream-9.2.0.Z.E4S:thunderbird-debugsource-0:140.9.0-1.el9_2.x86_64
Threats
Impact
Moderate
A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: Incorrect boundary conditions in the Graphics: Canvas2D component
6.1 (Medium)
Vendor Fix
For details on how to apply this update, which includes the changes described in this advisory, refer to:
https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2026:8287
Product status
Fixed
AppStream-9.2.0.Z.E4S:thunderbird-0:140.9.0-1.el9_2.aarch64
AppStream-9.2.0.Z.E4S:thunderbird-0:140.9.0-1.el9_2.ppc64le
AppStream-9.2.0.Z.E4S:thunderbird-0:140.9.0-1.el9_2.s390x
AppStream-9.2.0.Z.E4S:thunderbird-0:140.9.0-1.el9_2.src
AppStream-9.2.0.Z.E4S:thunderbird-0:140.9.0-1.el9_2.x86_64
AppStream-9.2.0.Z.E4S:thunderbird-debuginfo-0:140.9.0-1.el9_2.aarch64
AppStream-9.2.0.Z.E4S:thunderbird-debuginfo-0:140.9.0-1.el9_2.ppc64le
AppStream-9.2.0.Z.E4S:thunderbird-debuginfo-0:140.9.0-1.el9_2.s390x
AppStream-9.2.0.Z.E4S:thunderbird-debuginfo-0:140.9.0-1.el9_2.x86_64
AppStream-9.2.0.Z.E4S:thunderbird-debugsource-0:140.9.0-1.el9_2.aarch64
AppStream-9.2.0.Z.E4S:thunderbird-debugsource-0:140.9.0-1.el9_2.ppc64le
AppStream-9.2.0.Z.E4S:thunderbird-debugsource-0:140.9.0-1.el9_2.s390x
AppStream-9.2.0.Z.E4S:thunderbird-debugsource-0:140.9.0-1.el9_2.x86_64
Threats
Impact
Moderate
A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: Incorrect boundary conditions in the Graphics: Canvas2D component
6.1 (Medium)
Vendor Fix
For details on how to apply this update, which includes the changes described in this advisory, refer to:
https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2026:8287
Product status
Fixed
AppStream-9.2.0.Z.E4S:thunderbird-0:140.9.0-1.el9_2.aarch64
AppStream-9.2.0.Z.E4S:thunderbird-0:140.9.0-1.el9_2.ppc64le
AppStream-9.2.0.Z.E4S:thunderbird-0:140.9.0-1.el9_2.s390x
AppStream-9.2.0.Z.E4S:thunderbird-0:140.9.0-1.el9_2.src
AppStream-9.2.0.Z.E4S:thunderbird-0:140.9.