AlmaLinux alert ALSA-2026:7671 (firefox)

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[Announce]  [Security Advisory] ALSA-2026:7671: firefox security update (Important)
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Wed, 15 Apr 2026 15:27:54 +0000
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<0100019d91c18ee4-0b140ae4-a8b3-48bb-b092-dd02b6f704f6-000000@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: 2026-04-15

Summary:

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

Security Fix(es):  

  * libpng: libpng: Arbitrary code execution due to use-after-free vulnerability (CVE-2026-33416)
  * libpng: libpng: Information disclosure and denial of service via out-of-bounds read/write in
Neon palette expansion (CVE-2026-33636)
  * thunderbird: firefox: Memory safety bugs fixed in Firefox ESR 140.9.1, Thunderbird ESR 140.9.1,
Firefox 149.0.2 and Thunderbird 149.0.2 (CVE-2026-5734)
  * thunderbird: firefox: Memory safety bugs fixed in Firefox ESR 115.34.1, Firefox ESR 140.9.1,
Thunderbird ESR 140.9.1, Firefox 149.0.2 and Thunderbird 149.0.2 (CVE-2026-5731)
  * firefox: thunderbird: Incorrect boundary conditions, integer overflow in the Graphics: Text
component (CVE-2026-5732)


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-2026-7671.html

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Kind regards,
AlmaLinux Team
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