RHSA-2025:8608
Vulnerability from csaf_redhat - Published: 2025-06-05 17:16 - Updated: 2026-03-18 03:00Summary
Red Hat Security Advisory: thunderbird security update
Severity
Important
Notes
Topic: An update for thunderbird is now available for Red Hat Enterprise Linux 10.
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: Out-of-bounds access when resolving Promise objects (CVE-2025-4918)
* firefox: thunderbird: Out-of-bounds access when optimizing linear sums (CVE-2025-4919)
* firefox: thunderbird: Clickjacking vulnerability could have led to leaking saved payment card details (CVE-2025-5267)
* firefox: thunderbird: Potential local code execution in ?Copy as cURL? command (CVE-2025-5264)
* firefox: thunderbird: Memory safety bugs (CVE-2025-5268)
* firefox: thunderbird: Script element events leaked cross-origin resource status (CVE-2025-5266)
* firefox: thunderbird: Error handling for script execution was incorrectly isolated from web content (CVE-2025-5263)
* firefox: thunderbird: Memory safety bug (CVE-2025-5269)
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: An attacker was able to perform an out-of-bounds read or write on a JavaScript `Promise` object.
8.8 (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-2025:8608
Workaround
No mitigation is currently available that meets Red Hat Product Security’s standards for usability, deployment, applicability, or stability.
A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: An attacker could perform an out-of-bounds read or write on a JavaScript object by confusing array index sizes.
8.8 (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-2025:8608
Workaround
No mitigation is currently available that meets Red Hat Product Security’s standards for usability, deployment, applicability, or stability.
A flaw was found in Firefox. The Mozilla Foundation's Security Advisory describes the following issue: Error handling for script execution is incorrectly isolated from web content, which could allow cross-origin leak attacks.
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-2025:8608
A flaw was found in Firefox. The Mozilla Foundation's Security Advisory describes the following issue: Due to insufficient escaping of the newline character in the “Copy as cURL” feature, an attacker could trick a user into using this command, leading to local code execution on the user's system.
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-2025:8608
A flaw was found in Firefox. The Mozilla Foundation's Security Advisory describes the following issue: Script elements loading cross-origin resources generate load and error events which can leak information enabling XS-Leaks attacks.
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-2025:8608
A flaw was found in Firefox. The Mozilla Foundation's Security Advisory describes the following issue: A clickjacking vulnerability could be used to trick a user into leaking saved payment card details to a malicious page.
CWE-1021 - Improper Restriction of Rendered UI Layers or Frames
Vendor Fix
For details on how to apply this update, which includes the changes described in this advisory, refer to:
https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2025:8608
A flaw was found in Firefox. The Mozilla Foundation's Security Advisory describes the following issue: Some memory bugs show evidence of memory corruption, and we presume that with enough effort, some of these could be exploited to run arbitrary code.
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-2025:8608
A flaw was found in Firefox. The Mozilla Foundation's Security Advisory describes the following issue: This bug shows evidence of memory corruption and we presume that with enough effort this could be exploited to run arbitrary code.
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-2025:8608
A flaw was found in libvpx. A double-free issue can occur in `vpx_codec_enc_init_multi` after a failed allocation when initializing the encoder for WebRTC. This can cause memory corruption and an exploitable crash.
8.1 (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-2025:8608
Workaround
Mitigation is either unavailable or does not meet Red Hat Product Security standards for usability, deployment, applicability, or stability.
References
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"url": "https://www.cve.org/CVERecord?id=CVE-2025-5283"
},
{
"category": "external",
"summary": "https://nvd.nist.gov/vuln/detail/CVE-2025-5283",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2025-5283"
},
{
"category": "external",
"summary": "https://chromereleases.googleblog.com/2025/05/stable-channel-update-for-desktop_27.html",
"url": "https://chromereleases.googleblog.com/2025/05/stable-channel-update-for-desktop_27.html"
},
{
"category": "external",
"summary": "https://www.mozilla.org/en-US/security/advisories/mfsa2025-44/#CVE-2025-5283",
"url": "https://www.mozilla.org/en-US/security/advisories/mfsa2025-44/#CVE-2025-5283"
},
{
"category": "external",
"summary": "https://www.mozilla.org/en-US/security/advisories/mfsa2025-46/",
"url": "https://www.mozilla.org/en-US/security/advisories/mfsa2025-46/"
}
],
"release_date": "2025-05-27T18:56:00+00:00",
"remediations": [
{
"category": "vendor_fix",
"date": "2025-06-05T17:16:29+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-2025:8608"
},
{
"category": "workaround",
"details": "Mitigation is either unavailable or does not meet Red Hat Product Security standards for usability, deployment, applicability, or stability.",
"product_ids": [
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]
}
],
"scores": [
{
"cvss_v3": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "NONE",
"baseScore": 8.1,
"baseSeverity": "HIGH",
"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "REQUIRED",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N",
"version": "3.1"
},
"products": [
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]
}
],
"threats": [
{
"category": "impact",
"details": "Important"
}
],
"title": "libvpx: Double-free in libvpx encoder"
}
]
}
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Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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