RLSA-2026:76761

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Source
https://errata.rockylinux.org/RLSA-2026:76761
Import Source
https://storage.googleapis.com/resf-osv-data/RLSA-2026:76761.json
JSON Data
https://api.osv.dev/v1/vulns/RLSA-2026:76761
Upstream
CVE (43)
  • CVE-2026-100756
  • CVE-2026-100757
  • CVE-2026-100758
  • CVE-2026-100759
  • CVE-2026-100762
  • CVE-2026-100766
  • CVE-2026-100767
  • CVE-2026-100769
  • CVE-2026-100770
  • CVE-2026-100771
  • CVE-2026-100772
  • CVE-2026-100773
  • CVE-2026-100774
  • CVE-2026-100775
  • CVE-2026-100776
  • CVE-2026-100777
  • CVE-2026-100778
  • CVE-2026-100779
  • CVE-2026-100780
  • CVE-2026-100781
  • CVE-2026-100782
  • CVE-2026-100783
  • CVE-2026-100784
  • CVE-2026-100785
  • CVE-2026-100786
  • CVE-2026-100788
  • CVE-2026-100789
  • CVE-2026-100790
  • CVE-2026-100791
  • CVE-2026-100792
  • CVE-2026-100794
  • CVE-2026-100797
  • CVE-2026-100801
  • CVE-2026-100803
  • CVE-2026-100807
  • CVE-2026-100811
  • CVE-2026-100818
  • CVE-2026-100819
  • CVE-2026-100820
  • CVE-2026-100821
  • CVE-2026-100832
  • CVE-2026-92035
  • CVE-2026-96869
Published
2026-10-24T00:04:21Z
Modified
2026-10-24T00:30:02Z
Severity
  • 7.5 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H CVSS Calculator
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: Sandbox escape due to incorrect boundary conditions in the Graphics component (CVE-2026-92035)

  • firefox: thunderbird: Use-after-free in the Graphics: Canvas2D component (CVE-2026-100832)

  • firefox: Use-after-free in the Layout: Text and Fonts component (CVE-2026-100784)

  • firefox: thunderbird: Privilege escalation in the DLL Services component (CVE-2026-100801)

  • firefox: thunderbird: Sandbox escape due to incorrect boundary conditions in the Internationalization component (CVE-2026-100794)

  • firefox: thunderbird: Privilege escalation in the Address Bar component (CVE-2026-100820)

  • firefox: thunderbird: Use-after-free in the Graphics: Canvas2D component (CVE-2026-100777)

  • firefox: thunderbird: Information disclosure in the Networking: JAR component (CVE-2026-100766)

  • firefox: thunderbird: Use-after-free in the XSLT component (CVE-2026-100779)

  • firefox: thunderbird: Privilege escalation in the DOM: Service Workers component (CVE-2026-100807)

  • firefox: thunderbird: JIT miscompilation in the JavaScript: WebAssembly component (CVE-2026-100792)

  • firefox: Privilege escalation due to use-after-free in the Graphics: WebRender component (CVE-2026-100797)

  • firefox: thunderbird: Sandbox escape due to incorrect boundary conditions in the XPCOM component (CVE-2026-100819)

  • firefox: thunderbird: Use-after-free in the JavaScript: WebAssembly component (CVE-2026-100776)

  • firefox: thunderbird: Use-after-free in the Widget component (CVE-2026-100757)

  • firefox: Sandbox escape due to use-after-free in the Graphics component (CVE-2026-100786)

  • firefox: thunderbird: Information disclosure in the Networking component (CVE-2026-96869)

  • firefox: Sandbox escape due to use-after-free in the DOM: Content Processes component (CVE-2026-100770)

  • firefox: thunderbird: Use-after-free in the JavaScript: WebAssembly component (CVE-2026-100769)

  • firefox: Use-after-free in the DOM: Core & HTML component (CVE-2026-100791)

  • firefox: thunderbird: Sandbox escape due to use-after-free in the Widget: Gtk component (CVE-2026-100818)

  • firefox: thunderbird: Privilege escalation due to incorrect boundary conditions in the Graphics component (CVE-2026-100782)

  • firefox: firefox: Sandbox escape via use-after-free in DOM component (CVE-2026-100811)

  • firefox: thunderbird: Use-after-free in the DOM: Core & HTML component (CVE-2026-100772)

  • firefox: thunderbird: Uninitialized memory in the Storage: Quota Manager component (CVE-2026-100759)

  • firefox: Sandbox escape due to use-after-free in the DOM: Core & HTML component (CVE-2026-100778)

  • firefox: thunderbird: Sandbox escape in the DOM: Navigation component (CVE-2026-100758)

  • firefox: thunderbird: Sandbox escape in the Graphics component (CVE-2026-100775)

  • firefox: thunderbird: Sandbox escape due to incorrect boundary conditions in the Graphics: WebRender component (CVE-2026-100781)

  • firefox: Use-after-free in the DOM: Core & HTML component (CVE-2026-100774)

  • firefox: thunderbird: Same-origin policy bypass in the WebExtensions component (CVE-2026-100803)

  • firefox: thunderbird: Use-after-free in the Graphics: Canvas2D component (CVE-2026-100789)

  • firefox: thunderbird: Use-after-free in the DOM: Core & HTML component (CVE-2026-100785)

  • firefox: thunderbird: Site isolation issue in the Panning and Zooming component (CVE-2026-100821)

  • firefox: thunderbird: Invalid pointer in the JavaScript: WebAssembly component (CVE-2026-100788)

  • firefox: thunderbird: Undefined behavior in the DOM: Streams component (CVE-2026-100771)

  • firefox: Sandbox escape due to use-after-free in the DOM: Content Processes component (CVE-2026-100762)

  • firefox: thunderbird: Use-after-free in the XSLT component (CVE-2026-100790)

  • firefox: thunderbird: Use-after-free in the Storage: IndexedDB component (CVE-2026-100773)

  • firefox: thunderbird: Use-after-free in the DOM: Core & HTML component (CVE-2026-100780)

  • firefox: thunderbird: Use-after-free in the Networking: Cache component (CVE-2026-100767)

  • firefox: thunderbird: Incorrect boundary conditions in the Audio/Video: Playback component (CVE-2026-100756)

  • firefox: thunderbird: Uninitialized memory in the Audio/Video component (CVE-2026-100783)

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.

Database specific 
{
    "license":  "CC-BY-4.0",
    "license_url":  "https://creativecommons.org/licenses/by/4.0/",
    "source_advisory":  "RHSA-2026:76761"
}
References
Credits
    • Rocky Enterprise Software Foundation
    • Red Hat

Affected packages

Rocky Linux:9 / firefox

Package

Name
firefox
Purl
pkg:rpm/rocky-linux/firefox?distro=rocky-linux-9&epoch=0

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Fixed
0:140.17.0-1.el9_8
Database specific
Show details 
{
    "yum_repository":  "AppStream"
}

Database specific

source 
"https://storage.googleapis.com/resf-osv-data/RLSA-2026:76761.json"