Issued:

2025-09-17

Updated:

2025-09-17

RHSA-2025:16109 - Important: firefox security update

Synopsis

Important: firefox security update

Type/Severity

Security Advisory: Important

Topic

An update for firefox is now available for Red Hat Enterprise Linux 10.

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

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

Updated Packages

• firefox-debuginfo-140.3.0-1.el10_0.s390x.rpm
• firefox-debuginfo-140.3.0-1.el10_0.x86_64.rpm
• firefox-debugsource-140.3.0-1.el10_0.x86_64.rpm
• firefox-140.3.0-1.el10_0.x86_64.rpm
• firefox-140.3.0-1.el10_0.ppc64le.rpm
• firefox-debugsource-140.3.0-1.el10_0.ppc64le.rpm
• firefox-debuginfo-140.3.0-1.el10_0.aarch64.rpm
• firefox-debuginfo-140.3.0-1.el10_0.ppc64le.rpm
• firefox-debugsource-140.3.0-1.el10_0.aarch64.rpm
• firefox-140.3.0-1.el10_0.s390x.rpm
• firefox-140.3.0-1.el10_0.src.rpm
• firefox-140.3.0-1.el10_0.aarch64.rpm
• firefox-debugsource-140.3.0-1.el10_0.s390x.rpm

Fixes

• This content is not included.BZ - 2395745
• This content is not included.BZ - 2395754
• This content is not included.BZ - 2395755
• This content is not included.BZ - 2395756
• This content is not included.BZ - 2395759
• This content is not included.BZ - 2395764
• This content is not included.BZ - 2395766

CVEs

• CVE-2024-12224
• CVE-2025-10527
• CVE-2025-10528
• CVE-2025-10529
• CVE-2025-10532
• CVE-2025-10533
• CVE-2025-10536
• CVE-2025-10537

References

• https://access.redhat.com/security/updates/classification/#important

Additional information

• The Red Hat security contact is This content is not included.secalert@redhat.com. More contact details at Security Contacts and Procedures.
• Offline Security Data data is available for integration with other systems. See Offline Security Data API to get started.