An update for thunderbird is now available for Red Hat Enterprise Linux 8.2
 Advanced 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):
* 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.

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-2025-3028: Use After Free (CWE-416)
CVE-2025-3029: Origin Validation Error (CWE-346)
CVE-2025-3030: Buffer Copy without Checking Size of Input ('Classic Buffer
 Overflow') (CWE-120)