An update for thunderbird is now available for Red Hat Enterprise Linux 9.4
 Extended Update Support.

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: Mitigation bypass in the DOM: Security component (CVE-2025-13018)

* firefox: Use-after-free in the Audio/Video component (CVE-2025-13014)

* firefox: Incorrect boundary conditions in the JavaScript: WebAssembly
 component (CVE-2025-13016)

* firefox: Same-origin policy bypass in the DOM: Workers component
 (CVE-2025-13019)

* firefox: Use-after-free in the WebRTC: Audio/Video component (CVE-2025-13020)

* firefox: Race condition in the Graphics component (CVE-2025-13012)

* firefox: Spoofing issue in Firefox (CVE-2025-13015)

* firefox: Mitigation bypass in the DOM: Core & HTML component
 (CVE-2025-13013)

* firefox: Same-origin policy bypass in the DOM: Notifications component
 (CVE-2025-13017)

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.

CVE-2025-13012: Race Condition within a Thread (CWE-366)
CVE-2025-13013: Improper Neutralization of Input During Web Page Generation
 ('Cross-site Scripting') (CWE-79)
CVE-2025-13014: Expired Pointer Dereference (CWE-825)
CVE-2025-13015: Authentication Bypass by Spoofing (CWE-290)
CVE-2025-13016: Out-of-bounds Write (CWE-787)
CVE-2025-13017: Trust Boundary Violation (CWE-501)
CVE-2025-13018: Improper Neutralization of Input During Web Page Generation
 ('Cross-site Scripting') (CWE-79)
CVE-2025-13019: Origin Validation Error (CWE-346)
CVE-2025-13020: Expired Pointer Dereference (CWE-825)