RHSA-2023:6191 — Security Advisory

Red Hat Security Advisory: thunderbird security update

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Severity

Important

Red Hat Product Security

RHEL 9

Products

Official CSAF product identity

Published · October 31, 2023

Updated · March 18, 2026

Topic

An update for thunderbird is now available for Red Hat Enterprise Linux 9.

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.

This update upgrades Thunderbird to version 115.4.1.

Security Fix(es):

Mozilla: Queued up rendering could have allowed websites to clickjack (CVE-2023-5721)
Mozilla: Memory safety bugs fixed in Firefox 119, Firefox ESR 115.4, and Thunderbird 115.4 (CVE-2023-5730)
libvpx: crash related to VP9 encoding in libvpx (CVE-2023-44488)
Mozilla: Large WebGL draw could have led to a crash (CVE-2023-5724)
Mozilla: WebExtensions could open arbitrary URLs (CVE-2023-5725)
Mozilla: Improper object tracking during GC in the JavaScript engine could have led to a crash. (CVE-2023-5728)
Mozilla: Address bar spoofing via bidirectional characters (CVE-2023-5732)

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.