Red Hat alert RHSA-2025:16156-01 (thunderbird)

An update for thunderbird is now available for Red Hat Enterprise Linux 9.

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.

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.

This content is licensed under the Creative Commons Attribution 4.0
International License (https://creativecommons.org/licenses/by/4.0/). If you
distribute this content, or a modified version of it, you must provide
attribution to Red Hat Inc. and provide a link to the original.

Original: https://access.redhat.com/security/data/csaf/v2/advisories/2025/rhsa-2025_16156.json