Issued:
2025-10-06
Updated:
2025-10-06

RHSA-2025:17341 - Important: thunderbird security update

Synopsis

Important: thunderbird security update

Type/Severity

Security Advisory: Important

Topic

An update for thunderbird is now available for Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support and Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On.

Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.

Description

Mozilla Thunderbird is a standalone mail and newsgroup client.

Security Fix(es):

  • firefox: thunderbird: Sandbox escape due to use-after-free in the Graphics: Canvas2D component (CVE-2025-10527)

  • firefox: thunderbird: Incorrect boundary conditions in the JavaScript: GC component (CVE-2025-10532)

  • firefox: thunderbird: Sandbox escape due to undefined behavior, invalid pointer in the Graphics: Canvas2D component (CVE-2025-10528)

  • firefox: thunderbird: Same-origin policy bypass in the Layout component (CVE-2025-10529)

  • firefox: thunderbird: Memory safety bugs fixed in Firefox ESR 140.3, Thunderbird ESR 140.3, Firefox 143 and Thunderbird 143 (CVE-2025-10537)

  • firefox: thunderbird: Information disclosure in the Networking: Cache component (CVE-2025-10536)

  • firefox: thunderbird: Integer overflow in the SVG component (CVE-2025-10533)

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.

Solution

For details on how to apply this update, which includes the changes described in this advisory, refer to:

https://access.redhat.com/articles/11258

Affected Products

ProductVersionArch
Red Hat Enterprise Linux for x86_64 - Extended Life Cycle Long Life8.4x86_64
Red Hat Enterprise Linux Server - AUS8.4x86_64

Updated Packages

  • thunderbird-140.3.0-1.el8_4.src.rpm
  • thunderbird-140.3.0-1.el8_4.x86_64.rpm
  • thunderbird-debugsource-140.3.0-1.el8_4.x86_64.rpm
  • thunderbird-debuginfo-140.3.0-1.el8_4.x86_64.rpm

Fixes

CVEs

References

Additional information