RHSA-2025:19939 - Security Advisory

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):

• thunderbird: firefox: Memory safety bugs (CVE-2025-11714)
• thunderbird: firefox: Out of bounds read/write in a privileged process triggered by WebGL textures (CVE-2025-11709)
• thunderbird: firefox: Cross-process information leaked due to malicious IPC messages (CVE-2025-11710)
• thunderbird: firefox: Use-after-free in MediaTrackGraphImpl::GetInstance() (CVE-2025-11708)
• thunderbird: firefox: An OBJECT tag type attribute overrode browser behavior on web resources without a content-type (CVE-2025-11712)
• thunderbird: firefox: Memory safety bugs fixed in Firefox ESR 140.4, Thunderbird ESR 140.4, Firefox 144 and Thunderbird 144 (CVE-2025-11715)
• thunderbird: firefox: Some non-writable Object properties could be modified (CVE-2025-11711)

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 Extension 8.4 x86_64
• Red Hat Enterprise Linux Server - AUS 8.4 x86_64

Fixes

• BZ - 2403763 - CVE-2025-11714 thunderbird: firefox: Memory safety bugs
• BZ - 2403765 - CVE-2025-11709 thunderbird: firefox: Out of bounds read/write in a privileged process triggered by WebGL textures
• BZ - 2403768 - CVE-2025-11710 thunderbird: firefox: Cross-process information leaked due to malicious IPC messages
• BZ - 2403769 - CVE-2025-11708 thunderbird: firefox: Use-after-free in MediaTrackGraphImpl::GetInstance()
• BZ - 2403770 - CVE-2025-11712 thunderbird: firefox: An OBJECT tag type attribute overrode browser behavior on web resources without a content-type
• BZ - 2403774 - CVE-2025-11715 thunderbird: firefox: Memory safety bugs fixed in Firefox ESR 140.4, Thunderbird ESR 140.4, Firefox 144 and Thunderbird 144
• BZ - 2403776 - CVE-2025-11711 thunderbird: firefox: Some non-writable Object properties could be modified

CVEs

• CVE-2025-11708
• CVE-2025-11709
• CVE-2025-11710
• CVE-2025-11711
• CVE-2025-11712
• CVE-2025-11714
• CVE-2025-11715

References

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