AlmaLinux alert ALSA-2026:0924 (thunderbird)

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[Announce]  [Security Advisory] ALSA-2026:0924: thunderbird security update (Important)
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Sat, 24 Jan 2026 03:06:19 +0000
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<0100019bedf782a9-aa51861c-c33b-4f9c-9cf1-6414201af25d-000000@email.amazonses.com>
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Article
Hi,

You are receiving an AlmaLinux Security update email because you subscribed to receive errata
notifications from AlmaLinux.

AlmaLinux: 9
Type: Security
Severity: Important
Release date: 2026-01-24

Summary:

Mozilla Thunderbird is a standalone mail and newsgroup client.  

Security Fix(es):  

  * firefox: Spoofing issue in the Downloads Panel component (CVE-2025-14327)
  * firefox: Use-after-free in the JavaScript: GC component (CVE-2026-0885)
  * firefox: thunderbird: Memory safety bugs fixed in Firefox ESR 140.7, Thunderbird ESR 140.7,
Firefox 147 and Thunderbird 147 (CVE-2026-0891)
  * firefox: Sandbox escape due to incorrect boundary conditions in the Graphics: CanvasWebGL
component (CVE-2026-0878)
  * firefox: Use-after-free in the IPC component (CVE-2026-0882)
  * firefox: Use-after-free in the JavaScript Engine component (CVE-2026-0884)
  * firefox: Information disclosure in the Networking component (CVE-2026-0883)
  * firefox: Mitigation bypass in the DOM: Security component (CVE-2026-0877)
  * firefox: Spoofing issue in the DOM: Copy & Paste and Drag & Drop component (CVE-2026-0890)
  * firefox: Clickjacking issue, information disclosure in the PDF Viewer component
(CVE-2026-0887)
  * firefox: Sandbox escape due to incorrect boundary conditions in the Graphics component
(CVE-2026-0879)
  * firefox: Sandbox escape due to integer overflow in the Graphics component (CVE-2026-0880)
  * firefox: Incorrect boundary conditions in the Graphics component (CVE-2026-0886)


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.


Full details, updated packages, references, and other related information:
https://errata.almalinux.org/9/ALSA-2026-0924.html

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AlmaLinux Team
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