RLSA-2026:89758 (CVE-2026-109704)

Vulnerability from osv_rocky – Published: 2026-10-31 12:09 – Updated: 2026-11-04 12:14 – Source website
VLAI
Summary
Important: firefox security, bug fix, and enhancement update
Details

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

Security Fix(es):

  • libexpat: denial of service via crafted XML input (CVE-2026-45186)

  • expat: expat: Information disclosure via heap buffer over-read in XML_ParseBuffer (CVE-2026-77214)

  • firefox: thunderbird: Privilege escalation in the Application Update component (CVE-2026-109704)

  • firefox: Use-after-free in the XML component (CVE-2026-109718)

  • firefox: Incorrect boundary conditions in the JavaScript Engine component (CVE-2026-109715)

  • firefox: firefox: Sandbox escape via incorrect boundary conditions in Win32 widget (CVE-2026-109740)

  • firefox: Use-after-free in the Storage: IndexedDB component (CVE-2026-109706)

  • firefox: Use-after-free in the Crash Reporting component (CVE-2026-109713)

  • firefox: Use-after-free in the DOM: Core & HTML component (CVE-2026-109724)

  • firefox: Information disclosure, privilege escalation in the Security: Process Sandboxing component (CVE-2026-109709)

  • firefox: Sandbox escape, site isolation issue due to incorrect boundary conditions, use-after-free in the Networking component (CVE-2026-109705)

  • firefox: Use-after-free in the JavaScript Engine: JIT component (CVE-2026-109729)

  • firefox: Incorrect boundary conditions in the JavaScript Engine component (CVE-2026-109716)

  • firefox: Race condition, use-after-free in the Graphics: CanvasWebGL component (CVE-2026-109719)

  • firefox: Integer overflow in the Layout: Text and Fonts component (CVE-2026-109723)

  • firefox: Sandbox escape due to incorrect boundary conditions in the Networking component (CVE-2026-109708)

  • firefox: Use-after-free in the DOM: Bindings (WebIDL) component (CVE-2026-109717)

  • firefox: Sandbox escape due to use-after-free in the Networking component (CVE-2026-109707)

  • firefox: JIT miscompilation in the JavaScript: WebAssembly component (CVE-2026-109720)

  • firefox: Use-after-free in the SVG component (CVE-2026-109726)

  • firefox: Integer overflow in the Graphics component (CVE-2026-109730)

  • firefox: Use-after-free in the Audio/Video component (CVE-2026-109727)

  • firefox: Use-after-free in the DOM: Streams component (CVE-2026-109732)

  • firefox: Use-after-free in the DOM: Core & HTML component (CVE-2026-109725)

  • firefox: Sandbox escape due to uninitialized memory in the Graphics component (CVE-2026-109712)

  • firefox: Use-after-free in the Graphics: Canvas2D component (CVE-2026-109711)

  • firefox: JIT miscompilation in the JavaScript Engine: JIT component (CVE-2026-109722)

  • firefox: Use-after-free in the DOM: Animation component (CVE-2026-109728)

  • firefox: Incorrect boundary conditions in the JavaScript Engine: JIT component (CVE-2026-109721)

Bug Fix(es) and Enhancement(s):

  • Firefox ESR 153 rebase [rhel-10.2.z] (JIRA:Rocky Linux-175166)

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
8.2 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:L
Credits
Rocky Enterprise Software Foundation
Red Hat
References
https://errata.rockylinux.org/RLSA-2026:89758 ADVISORY
https://bugzilla.redhat.com/show_bug.cgi?id=2468575 REPORT
https://bugzilla.redhat.com/show_bug.cgi?id=2547476 REPORT
https://bugzilla.redhat.com/show_bug.cgi?id=2550397 REPORT
https://bugzilla.redhat.com/show_bug.cgi?id=2550400 REPORT
https://bugzilla.redhat.com/show_bug.cgi?id=2550403 REPORT
https://bugzilla.redhat.com/show_bug.cgi?id=2550404 REPORT
https://bugzilla.redhat.com/show_bug.cgi?id=2550405 REPORT
https://bugzilla.redhat.com/show_bug.cgi?id=2550406 REPORT
https://bugzilla.redhat.com/show_bug.cgi?id=2550408 REPORT
https://bugzilla.redhat.com/show_bug.cgi?id=2550412 REPORT
https://bugzilla.redhat.com/show_bug.cgi?id=2550413 REPORT
https://bugzilla.redhat.com/show_bug.cgi?id=2550420 REPORT
https://bugzilla.redhat.com/show_bug.cgi?id=2550422 REPORT
https://bugzilla.redhat.com/show_bug.cgi?id=2550424 REPORT
https://bugzilla.redhat.com/show_bug.cgi?id=2550426 REPORT
https://bugzilla.redhat.com/show_bug.cgi?id=2550432 REPORT
https://bugzilla.redhat.com/show_bug.cgi?id=2550433 REPORT
https://bugzilla.redhat.com/show_bug.cgi?id=2550438 REPORT
https://bugzilla.redhat.com/show_bug.cgi?id=2550442 REPORT
https://bugzilla.redhat.com/show_bug.cgi?id=2550446 REPORT
https://bugzilla.redhat.com/show_bug.cgi?id=2550450 REPORT
https://bugzilla.redhat.com/show_bug.cgi?id=2550451 REPORT
https://bugzilla.redhat.com/show_bug.cgi?id=2550455 REPORT
https://bugzilla.redhat.com/show_bug.cgi?id=2550467 REPORT
https://bugzilla.redhat.com/show_bug.cgi?id=2550468 REPORT
https://bugzilla.redhat.com/show_bug.cgi?id=2550469 REPORT
https://bugzilla.redhat.com/show_bug.cgi?id=2550471 REPORT
https://bugzilla.redhat.com/show_bug.cgi?id=2550474 REPORT
https://bugzilla.redhat.com/show_bug.cgi?id=2550478 REPORT
https://access.redhat.com/errata/RHSA-2026:89758 ADVISORY
To clipboard 

{
  "affected": [
    {
      "package": {
        "ecosystem": "Rocky Linux:10",
        "name": "firefox",
        "purl": "pkg:rpm/rocky-linux/firefox?distro=rocky-linux-10\u0026epoch=0"
      },
      "ranges": [
        {
          "database_specific": {
            "yum_repository": "AppStream"
          },
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "0:153.5.0-1.el10_2"
            }
          ],
          "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-2026:89758"
  },
  "details": "Mozilla Firefox is an open-source web browser, designed for standards compliance, performance, and portability.\n\nSecurity Fix(es):\n\n* libexpat: denial of service via crafted XML input (CVE-2026-45186)\n\n* expat: expat: Information disclosure via heap buffer over-read in XML_ParseBuffer (CVE-2026-77214)\n\n* firefox: thunderbird: Privilege escalation in the Application Update component (CVE-2026-109704)\n\n* firefox: Use-after-free in the XML component (CVE-2026-109718)\n\n* firefox: Incorrect boundary conditions in the JavaScript Engine component (CVE-2026-109715)\n\n* firefox: firefox: Sandbox escape via incorrect boundary conditions in Win32 widget (CVE-2026-109740)\n\n* firefox: Use-after-free in the Storage: IndexedDB component (CVE-2026-109706)\n\n* firefox: Use-after-free in the Crash Reporting component (CVE-2026-109713)\n\n* firefox: Use-after-free in the DOM: Core \u0026 HTML component (CVE-2026-109724)\n\n* firefox: Information disclosure, privilege escalation in the Security: Process Sandboxing component (CVE-2026-109709)\n\n* firefox: Sandbox escape, site isolation issue due to incorrect boundary conditions, use-after-free in the Networking component (CVE-2026-109705)\n\n* firefox: Use-after-free in the JavaScript Engine: JIT component (CVE-2026-109729)\n\n* firefox: Incorrect boundary conditions in the JavaScript Engine component (CVE-2026-109716)\n\n* firefox: Race condition, use-after-free in the Graphics: CanvasWebGL component (CVE-2026-109719)\n\n* firefox: Integer overflow in the Layout: Text and Fonts component (CVE-2026-109723)\n\n* firefox: Sandbox escape due to incorrect boundary conditions in the Networking component (CVE-2026-109708)\n\n* firefox: Use-after-free in the DOM: Bindings (WebIDL) component (CVE-2026-109717)\n\n* firefox: Sandbox escape due to use-after-free in the Networking component (CVE-2026-109707)\n\n* firefox: JIT miscompilation in the JavaScript: WebAssembly component (CVE-2026-109720)\n\n* firefox: Use-after-free in the SVG component (CVE-2026-109726)\n\n* firefox: Integer overflow in the Graphics component (CVE-2026-109730)\n\n* firefox: Use-after-free in the Audio/Video component (CVE-2026-109727)\n\n* firefox: Use-after-free in the DOM: Streams component (CVE-2026-109732)\n\n* firefox: Use-after-free in the DOM: Core \u0026 HTML component (CVE-2026-109725)\n\n* firefox: Sandbox escape due to uninitialized memory in the Graphics component (CVE-2026-109712)\n\n* firefox: Use-after-free in the Graphics: Canvas2D component (CVE-2026-109711)\n\n* firefox: JIT miscompilation in the JavaScript Engine: JIT component (CVE-2026-109722)\n\n* firefox: Use-after-free in the DOM: Animation component (CVE-2026-109728)\n\n* firefox: Incorrect boundary conditions in the JavaScript Engine: JIT component (CVE-2026-109721)\n\nBug Fix(es) and Enhancement(s):\n\n* Firefox ESR 153 rebase [rhel-10.2.z] (JIRA:Rocky Linux-175166)\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-2026:89758",
  "modified": "2026-11-04T12:14:49.461153Z",
  "published": "2026-10-31T12:09:44.748638Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://errata.rockylinux.org/RLSA-2026:89758"
    },
    {
      "type": "REPORT",
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2468575"
    },
    {
      "type": "REPORT",
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2547476"
    },
    {
      "type": "REPORT",
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2550397"
    },
    {
      "type": "REPORT",
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2550400"
    },
    {
      "type": "REPORT",
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2550403"
    },
    {
      "type": "REPORT",
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2550404"
    },
    {
      "type": "REPORT",
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2550405"
    },
    {
      "type": "REPORT",
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2550406"
    },
    {
      "type": "REPORT",
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2550408"
    },
    {
      "type": "REPORT",
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2550412"
    },
    {
      "type": "REPORT",
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2550413"
    },
    {
      "type": "REPORT",
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2550420"
    },
    {
      "type": "REPORT",
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2550422"
    },
    {
      "type": "REPORT",
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2550424"
    },
    {
      "type": "REPORT",
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2550426"
    },
    {
      "type": "REPORT",
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2550432"
    },
    {
      "type": "REPORT",
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2550433"
    },
    {
      "type": "REPORT",
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2550438"
    },
    {
      "type": "REPORT",
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2550442"
    },
    {
      "type": "REPORT",
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2550446"
    },
    {
      "type": "REPORT",
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2550450"
    },
    {
      "type": "REPORT",
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2550451"
    },
    {
      "type": "REPORT",
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2550455"
    },
    {
      "type": "REPORT",
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2550467"
    },
    {
      "type": "REPORT",
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2550468"
    },
    {
      "type": "REPORT",
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2550469"
    },
    {
      "type": "REPORT",
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2550471"
    },
    {
      "type": "REPORT",
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2550474"
    },
    {
      "type": "REPORT",
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2550478"
    },
    {
      "type": "ADVISORY",
      "url": "https://access.redhat.com/errata/RHSA-2026:89758"
    }
  ],
  "schema_version": "1.7.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:L",
      "type": "CVSS_V3"
    }
  ],
  "summary": "Important: firefox security, bug fix, and enhancement update",
  "upstream": [
    "CVE-2026-109704",
    "CVE-2026-109705",
    "CVE-2026-109706",
    "CVE-2026-109707",
    "CVE-2026-109708",
    "CVE-2026-109709",
    "CVE-2026-109711",
    "CVE-2026-109712",
    "CVE-2026-109713",
    "CVE-2026-109715",
    "CVE-2026-109716",
    "CVE-2026-109717",
    "CVE-2026-109718",
    "CVE-2026-109719",
    "CVE-2026-109720",
    "CVE-2026-109721",
    "CVE-2026-109722",
    "CVE-2026-109723",
    "CVE-2026-109724",
    "CVE-2026-109725",
    "CVE-2026-109726",
    "CVE-2026-109727",
    "CVE-2026-109728",
    "CVE-2026-109729",
    "CVE-2026-109730",
    "CVE-2026-109732",
    "CVE-2026-109740",
    "CVE-2026-45186",
    "CVE-2026-77214"
  ]
}



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Sightings

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Nomenclature

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  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
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