RHSA-2021:2742HighCVSS 8.8

Red Hat Security Advisory: firefox security update

Published
July 15, 2021
Last Modified
November 12, 2026

🔗 CVE IDs covered (3)

CVE-2021-29976 →CVE-2021-30547 →CVE-2021-29970 →

📋 Description

CVE-2021-29970 — Mozilla: Use-after-free in accessibility features of a document CVE-2021-29976 — Mozilla: Memory safety bugs fixed in Firefox 90 and Firefox ESR 78.12 CVE-2021-30547 — chromium-browser: Out of bounds write in ANGLE

🎯 Affected products14

  • Red Hat Enterprise Linux AppStream EUS (v. 8.2)
  • firefox-0:78.12.0-1.el8_2.aarch64 as a component of Red Hat Enterprise Linux AppStream EUS (v. 8.2)
  • firefox-0:78.12.0-1.el8_2.ppc64le as a component of Red Hat Enterprise Linux AppStream EUS (v. 8.2)
  • firefox-0:78.12.0-1.el8_2.s390x as a component of Red Hat Enterprise Linux AppStream EUS (v. 8.2)
  • firefox-0:78.12.0-1.el8_2.src as a component of Red Hat Enterprise Linux AppStream EUS (v. 8.2)
  • firefox-0:78.12.0-1.el8_2.x86_64 as a component of Red Hat Enterprise Linux AppStream EUS (v. 8.2)
  • firefox-debuginfo-0:78.12.0-1.el8_2.aarch64 as a component of Red Hat Enterprise Linux AppStream EUS (v. 8.2)
  • firefox-debuginfo-0:78.12.0-1.el8_2.ppc64le as a component of Red Hat Enterprise Linux AppStream EUS (v. 8.2)
  • firefox-debuginfo-0:78.12.0-1.el8_2.s390x as a component of Red Hat Enterprise Linux AppStream EUS (v. 8.2)
  • firefox-debuginfo-0:78.12.0-1.el8_2.x86_64 as a component of Red Hat Enterprise Linux AppStream EUS (v. 8.2)
  • firefox-debugsource-0:78.12.0-1.el8_2.aarch64 as a component of Red Hat Enterprise Linux AppStream EUS (v. 8.2)
  • firefox-debugsource-0:78.12.0-1.el8_2.ppc64le as a component of Red Hat Enterprise Linux AppStream EUS (v. 8.2)
  • firefox-debugsource-0:78.12.0-1.el8_2.s390x as a component of Red Hat Enterprise Linux AppStream EUS (v. 8.2)
  • firefox-debugsource-0:78.12.0-1.el8_2.x86_64 as a component of Red Hat Enterprise Linux AppStream EUS (v. 8.2)

✅ Remediation

For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 After installing the update, Firefox must be restarted for the changes to take effect.

🔗 References (6)