RLSA-2026:68549 (CVE-2026-16365)

Vulnerability from osv_rocky – Published: 2026-09-27 06:01 – Updated: 2026-09-28 06:14 – Source website
VLAI
Summary
Important: firefox security update
Details

Mozilla Firefox is an open-source web browser, designed for standards compliance, performance, and portability.

Security Fix(es):

  • firefox: thunderbird: Privilege escalation in the DOM: Workers component (CVE-2026-16365)

  • firefox: thunderbird: Sandbox escape in the Remote Settings Client component (CVE-2026-75874)

  • firefox: Sandbox escape due to use-after-free in the DOM: Security component (CVE-2026-84121)

  • firefox: Internally found bugs fixed in Firefox 155, Firefox ESR 153.2, Firefox ESR 140.15 and Firefox ESR 115.40 (CVE-2026-84145)

  • firefox: Sandbox escape due to use-after-free in the DOM: Navigation component (CVE-2026-84119)

  • firefox: Use-after-free in the Audio/Video component (CVE-2026-84120)

  • firefox: Privilege escalation due to invalid pointer in the Graphics component (CVE-2026-84131)

  • firefox: Use-after-free in the DOM: Core & HTML component (CVE-2026-84124)

  • firefox: Use-after-free in the Audio/Video component (CVE-2026-84122)

  • firefox: Internally found bugs fixed in Firefox 155, Firefox ESR 153.2 and Firefox ESR 140.15 (CVE-2026-84143)

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.

Severity
7.5 (High)
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H
Credits
Rocky Enterprise Software Foundation
Red Hat
References
To clipboard 

{
  "affected": [
    {
      "package": {
        "ecosystem": "Rocky Linux:8",
        "name": "firefox",
        "purl": "pkg:rpm/rocky-linux/firefox?distro=rocky-linux-8\u0026epoch=0"
      },
      "ranges": [
        {
          "database_specific": {
            "yum_repository": "AppStream"
          },
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "0:140.15.0-1.el8_10"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "credits": [
    {
      "name": "Rocky Enterprise Software Foundation"
    },
    {
      "name": "Red Hat"
    }
  ],
  "database_specific": {
    "license": "CC-BY-4.0",
    "license_url": "https://creativecommons.org/licenses/by/4.0/",
    "source_advisory": "RHSA-2026:68549"
  },
  "details": "Mozilla Firefox is an open-source web browser, designed for standards compliance, performance, and portability.\n\nSecurity Fix(es):\n\n* firefox: thunderbird: Privilege escalation in the DOM: Workers component (CVE-2026-16365)\n\n* firefox: thunderbird: Sandbox escape in the Remote Settings Client component (CVE-2026-75874)\n\n* firefox: Sandbox escape due to use-after-free in the DOM: Security component (CVE-2026-84121)\n\n* firefox: Internally found bugs fixed in Firefox 155, Firefox ESR 153.2, Firefox ESR 140.15 and Firefox ESR 115.40 (CVE-2026-84145)\n\n* firefox: Sandbox escape due to use-after-free in the DOM: Navigation component (CVE-2026-84119)\n\n* firefox: Use-after-free in the Audio/Video component (CVE-2026-84120)\n\n* firefox: Privilege escalation due to invalid pointer in the Graphics component (CVE-2026-84131)\n\n* firefox: Use-after-free in the DOM: Core \u0026 HTML component (CVE-2026-84124)\n\n* firefox: Use-after-free in the Audio/Video component (CVE-2026-84122)\n\n* firefox: Internally found bugs fixed in Firefox 155, Firefox ESR 153.2 and Firefox ESR 140.15 (CVE-2026-84143)\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.",
  "id": "RLSA-2026:68549",
  "modified": "2026-09-28T06:14:34.331553Z",
  "published": "2026-09-27T06:01:34.484119Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://errata.rockylinux.org/RLSA-2026:68549"
    },
    {
      "type": "REPORT",
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2503504"
    },
    {
      "type": "REPORT",
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2517832"
    },
    {
      "type": "REPORT",
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2526753"
    },
    {
      "type": "REPORT",
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2526760"
    },
    {
      "type": "REPORT",
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2526764"
    },
    {
      "type": "REPORT",
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2526765"
    },
    {
      "type": "REPORT",
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2526767"
    },
    {
      "type": "REPORT",
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2526773"
    },
    {
      "type": "REPORT",
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2526778"
    },
    {
      "type": "REPORT",
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2526781"
    },
    {
      "type": "ADVISORY",
      "url": "https://access.redhat.com/errata/RHSA-2026:68549"
    }
  ],
  "schema_version": "1.7.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "Important: firefox security update",
  "upstream": [
    "CVE-2026-16365",
    "CVE-2026-75874",
    "CVE-2026-84119",
    "CVE-2026-84120",
    "CVE-2026-84121",
    "CVE-2026-84122",
    "CVE-2026-84124",
    "CVE-2026-84131",
    "CVE-2026-84143",
    "CVE-2026-84145"
  ]
}



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