RHSA-2025:4031 — Security Advisory

An update for thunderbird is now available for Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support, Red Hat Enterprise Linux 8.4 Update Services for SAP Solutions, and Red Hat Enterprise Linux 8.4 Telecommunications Update Service.

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):

• 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.