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OpenAdvisories
High RLSA-2026:89757 48 CVEs

Important: firefox security, bug fix, and enhancement update

Published Oct 31, 2026 · Updated Oct 31, 2026

Ecosystem: Rocky Linux

Summary

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)

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

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

* firefox: Information disclosure in the PDF Viewer component (CVE-2026-109742)

* 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: Sandbox escape due to uninitialized memory in the DOM: Web Serial component (CVE-2026-109745)

* firefox: Mitigation bypass in the File Handling component (CVE-2026-109782)

* 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 Audio/Video: Playback component (CVE-2026-109738)

* firefox: Sandbox escape due to race condition in the Networking component (CVE-2026-109757)

* firefox: Use-after-free in the Storage: Bucket File System component (CVE-2026-109741)

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

* firefox: Other issue in the DOM: File component (CVE-2026-109744)

* 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: Incorrect boundary conditions in the Layout component (CVE-2026-109753)

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

* firefox: Privilege escalation in the DOM: Navigation component (CVE-2026-109756)

* firefox: JIT miscompilation in the JavaScript Engine: JIT component (CVE-2026-109733)

* firefox: Mitigation bypass in the File Handling component (CVE-2026-109763)

* 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: Use-after-free in the DOM: Workers component (CVE-2026-109752)

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

* firefox: Mitigation bypass in the Networking: HTTP component (CVE-2026-109760)

* 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: Mitigation bypass in the Enterprise Policies component (CVE-2026-109737)

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

* firefox: Site isolation issue in the Networking component (CVE-2026-109759)

* firefox: Incorrect boundary conditions in the SVG component (CVE-2026-109762)

* firefox: Incorrect boundary conditions in the DOM: Editor component (CVE-2026-109754)

* firefox: Information disclosure in the Networking component (CVE-2026-109751)

* 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: Frame poisoning in the Layout component (CVE-2026-109736)

* 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)

* firefox: Privilege escalation in the Panning and Zooming component (CVE-2026-109743)

Bug Fix(es) and Enhancement(s):

* Firefox ESR 153 rebase [rhel-9.8.z] (JIRA:Rocky Linux-175155)

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.

Fixed packages 1

ReleasePackageFixed in
Rocky Linux · 9 firefox 0:153.5.0-1.el9_8

Vulnerabilities 48

References

  • report
    https://bugzilla.redhat.com/show_bug.cgi?id=2468575
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    https://bugzilla.redhat.com/show_bug.cgi?id=2550397
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    https://bugzilla.redhat.com/show_bug.cgi?id=2550400
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    https://bugzilla.redhat.com/show_bug.cgi?id=2550401
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    https://bugzilla.redhat.com/show_bug.cgi?id=2550403
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    https://bugzilla.redhat.com/show_bug.cgi?id=2550404
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    https://bugzilla.redhat.com/show_bug.cgi?id=2550405
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    https://bugzilla.redhat.com/show_bug.cgi?id=2550406
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    https://bugzilla.redhat.com/show_bug.cgi?id=2550408
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    https://bugzilla.redhat.com/show_bug.cgi?id=2550410
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    https://bugzilla.redhat.com/show_bug.cgi?id=2550411
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    https://bugzilla.redhat.com/show_bug.cgi?id=2550412
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    https://bugzilla.redhat.com/show_bug.cgi?id=2550413
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    https://bugzilla.redhat.com/show_bug.cgi?id=2550417
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    https://bugzilla.redhat.com/show_bug.cgi?id=2550418
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    https://bugzilla.redhat.com/show_bug.cgi?id=2550419
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    https://bugzilla.redhat.com/show_bug.cgi?id=2550420
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    https://bugzilla.redhat.com/show_bug.cgi?id=2550421
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    https://bugzilla.redhat.com/show_bug.cgi?id=2550422
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    https://bugzilla.redhat.com/show_bug.cgi?id=2550424
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    https://bugzilla.redhat.com/show_bug.cgi?id=2550425
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    https://bugzilla.redhat.com/show_bug.cgi?id=2550426
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    https://bugzilla.redhat.com/show_bug.cgi?id=2550428
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    https://bugzilla.redhat.com/show_bug.cgi?id=2550429
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    https://bugzilla.redhat.com/show_bug.cgi?id=2550431
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    https://bugzilla.redhat.com/show_bug.cgi?id=2550432
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    https://bugzilla.redhat.com/show_bug.cgi?id=2550433
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    https://bugzilla.redhat.com/show_bug.cgi?id=2550434
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    https://bugzilla.redhat.com/show_bug.cgi?id=2550438
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    https://bugzilla.redhat.com/show_bug.cgi?id=2550440
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    https://bugzilla.redhat.com/show_bug.cgi?id=2550442
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    https://bugzilla.redhat.com/show_bug.cgi?id=2550446
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    https://bugzilla.redhat.com/show_bug.cgi?id=2550450
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    https://bugzilla.redhat.com/show_bug.cgi?id=2550451
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    https://bugzilla.redhat.com/show_bug.cgi?id=2550452
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    https://bugzilla.redhat.com/show_bug.cgi?id=2550455
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    https://bugzilla.redhat.com/show_bug.cgi?id=2550458
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    https://bugzilla.redhat.com/show_bug.cgi?id=2550461
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    https://bugzilla.redhat.com/show_bug.cgi?id=2550464