RHSA-2020:1495 — Security Advisory

Red Hat Security Advisory: thunderbird security update

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Severity

Important

Red Hat Product Security

RHEL 8

Products

Official CSAF product identity

Published · April 17, 2020

Updated · November 22, 2025

Topic

An update for thunderbird is now available for Red Hat Enterprise Linux 8.

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 68.7.0.

Security Fix(es):

Mozilla: Use-after-free while running the nsDocShell destructor (CVE-2020-6819)
Mozilla: Use-after-free when handling a ReadableStream (CVE-2020-6820)
Mozilla: Uninitialized memory could be read when using the WebGL copyTexSubImage method (CVE-2020-6821)
Mozilla: Memory safety bugs fixed in Firefox 75 and Firefox ESR 68.7 (CVE-2020-6825)
Mozilla: Out of bounds write in GMPDecodeData when processing large images (CVE-2020-6822)

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.