Skip to content
OpenAdvisories
High RLSA-2021:2883 4 CVEs

Important: thunderbird security update

Published Jul 26, 2021 · Updated Feb 4, 2026

Summary

Mozilla Thunderbird is a standalone mail and newsgroup client.

This update upgrades Thunderbird to version 78.12.0.

Security Fix(es):

* Mozilla: IMAP server responses sent by a MITM prior to STARTTLS could be processed (CVE-2021-29969)

* Mozilla: Use-after-free in accessibility features of a document (CVE-2021-29970)

* Mozilla: Memory safety bugs fixed in Firefox 90 and Firefox ESR 78.12 (CVE-2021-29976)

* chromium-browser: Out of bounds write in ANGLE (CVE-2021-30547)

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.

Fixed packages 1

ReleasePackageFixed in
Rocky Linux · 8 thunderbird 0:78.12.0-3.el8_4

Vulnerabilities 4

References

  • report
    https://bugzilla.redhat.com/show_bug.cgi?id=1970109
  • report
    https://bugzilla.redhat.com/show_bug.cgi?id=1982013
  • report
    https://bugzilla.redhat.com/show_bug.cgi?id=1982014
  • report
    https://bugzilla.redhat.com/show_bug.cgi?id=1982015