RHSA-2025:21841 - Security Advisory

Topic

An update for thunderbird is now available for Red Hat Enterprise Linux 9.6 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.

Description

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.

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

• Red Hat Enterprise Linux for x86_64 - Extended Update Support 9.6 x86_64
• Red Hat Enterprise Linux Server - AUS 9.6 x86_64
• Red Hat Enterprise Linux for IBM z Systems - Extended Update Support 9.6 s390x
• Red Hat Enterprise Linux for Power, little endian - Extended Update Support 9.6 ppc64le
• Red Hat Enterprise Linux for ARM 64 - Extended Update Support 9.6 aarch64
• Red Hat Enterprise Linux Server for Power LE - Update Services for SAP Solutions 9.6 ppc64le
• Red Hat Enterprise Linux for x86_64 - Update Services for SAP Solutions 9.6 x86_64
• Red Hat Enterprise Linux for ARM 64 - 4 years of updates 9.6 aarch64
• Red Hat Enterprise Linux for IBM z Systems - 4 years of updates 9.6 s390x

Fixes

• BZ - 2414079 - CVE-2025-13018 firefox: thunderbird: Mitigation bypass in the DOM: Security component
• BZ - 2414080 - CVE-2025-13014 firefox: thunderbird: Use-after-free in the Audio/Video component
• BZ - 2414083 - CVE-2025-13016 firefox: thunderbird: Incorrect boundary conditions in the JavaScript: WebAssembly component
• BZ - 2414084 - CVE-2025-13019 firefox: thunderbird: Same-origin policy bypass in the DOM: Workers component
• BZ - 2414085 - CVE-2025-13020 firefox: thunderbird: Use-after-free in the WebRTC: Audio/Video component
• BZ - 2414086 - CVE-2025-13012 firefox: thunderbird: Race condition in the Graphics component
• BZ - 2414090 - CVE-2025-13015 firefox: thunderbird: Spoofing issue in Firefox
• BZ - 2414091 - CVE-2025-13013 firefox: thunderbird: Mitigation bypass in the DOM: Core & HTML component
• BZ - 2414092 - CVE-2025-13017 firefox: thunderbird: Same-origin policy bypass in the DOM: Notifications component

CVEs

• CVE-2025-13012
• CVE-2025-13013
• CVE-2025-13014
• CVE-2025-13015
• CVE-2025-13016
• CVE-2025-13017
• CVE-2025-13018
• CVE-2025-13019
• CVE-2025-13020

References

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