RHSA-2025:4026 - Security Advisory

Topic

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.

Description

Mozilla Thunderbird is a standalone mail and newsgroup client.

Security Fix(es):

• thunderbird: Use-after-free triggered by XSLTProcessor (CVE-2025-3028)
• thunderbird: URL Bar Spoofing via non-BMP Unicode characters (CVE-2025-3029)
• thunderbird: Memory safety bugs fixed in Thunderbird 137 and Thunderbird 128.9 (CVE-2025-3030)

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

Before applying this update, make sure all previously released errata
relevant to your system have been applied.

For details on how to apply this update, refer to:

https://access.redhat.com/articles/11258

Affected Products

• Red Hat Enterprise Linux for x86_64 - Extended Update Support 9.4 x86_64
• Red Hat Enterprise Linux Server - AUS 9.4 x86_64
• Red Hat Enterprise Linux for IBM z Systems - Extended Update Support 9.4 s390x
• Red Hat Enterprise Linux for Power, little endian - Extended Update Support 9.4 ppc64le
• Red Hat Enterprise Linux for ARM 64 - Extended Update Support 9.4 aarch64
• Red Hat Enterprise Linux Server for Power LE - Update Services for SAP Solutions 9.4 ppc64le
• Red Hat Enterprise Linux for x86_64 - Update Services for SAP Solutions 9.4 x86_64
• Red Hat Enterprise Linux for ARM 64 - 4 years of updates 9.4 aarch64
• Red Hat Enterprise Linux for IBM z Systems - 4 years of updates 9.4 s390x

Fixes

• BZ - 2353497 - thunderbird: Thunderbird 128.9.0esr
• BZ - 2356556 - CVE-2025-3029 firefox: thunderbird: URL Bar Spoofing via non-BMP Unicode characters
• BZ - 2356562 - CVE-2025-3028 firefox: thunderbird: Use-after-free triggered by XSLTProcessor
• BZ - 2356563 - CVE-2025-3030 firefox: thunderbird: Memory safety bugs fixed in Firefox 137, Thunderbird 137, Firefox ESR 128.9, and Thunderbird 128.9

CVEs

• CVE-2025-3028
• CVE-2025-3029
• CVE-2025-3030

References

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