RHSA-2020:1339CriticalCVSS 8.8

Red Hat Security Advisory: firefox security update

Published
April 7, 2020
Last Modified
November 5, 2026

🔗 CVE IDs covered (2)

CVE-2020-6819 →CVE-2020-6820 →

📋 Description

CVE-2020-6819 — Mozilla: Use-after-free while running the nsDocShell destructor CVE-2020-6820 — Mozilla: Use-after-free when handling a ReadableStream

🎯 Affected products37

  • Red Hat Enterprise Linux Desktop (v. 6)
  • Red Hat Enterprise Linux Desktop Optional (v. 6)
  • Red Hat Enterprise Linux HPC Node Optional (v. 6)
  • Red Hat Enterprise Linux Server (v. 6)
  • Red Hat Enterprise Linux Server Optional (v. 6)
  • Red Hat Enterprise Linux Workstation (v. 6)
  • Red Hat Enterprise Linux Workstation Optional (v. 6)
  • firefox-0:68.6.1-1.el6_10.i686 as a component of Red Hat Enterprise Linux Desktop (v. 6)
  • firefox-0:68.6.1-1.el6_10.i686 as a component of Red Hat Enterprise Linux Desktop Optional (v. 6)
  • firefox-0:68.6.1-1.el6_10.i686 as a component of Red Hat Enterprise Linux HPC Node Optional (v. 6)
  • firefox-0:68.6.1-1.el6_10.i686 as a component of Red Hat Enterprise Linux Server (v. 6)
  • firefox-0:68.6.1-1.el6_10.i686 as a component of Red Hat Enterprise Linux Server Optional (v. 6)
  • firefox-0:68.6.1-1.el6_10.i686 as a component of Red Hat Enterprise Linux Workstation (v. 6)
  • firefox-0:68.6.1-1.el6_10.i686 as a component of Red Hat Enterprise Linux Workstation Optional (v. 6)
  • firefox-0:68.6.1-1.el6_10.ppc64 as a component of Red Hat Enterprise Linux Server (v. 6)
  • firefox-0:68.6.1-1.el6_10.s390x as a component of Red Hat Enterprise Linux Server (v. 6)
  • firefox-0:68.6.1-1.el6_10.src as a component of Red Hat Enterprise Linux Desktop (v. 6)
  • firefox-0:68.6.1-1.el6_10.src as a component of Red Hat Enterprise Linux HPC Node Optional (v. 6)
  • firefox-0:68.6.1-1.el6_10.src as a component of Red Hat Enterprise Linux Server (v. 6)
  • firefox-0:68.6.1-1.el6_10.src as a component of Red Hat Enterprise Linux Workstation (v. 6)
  • firefox-0:68.6.1-1.el6_10.x86_64 as a component of Red Hat Enterprise Linux Desktop (v. 6)
  • firefox-0:68.6.1-1.el6_10.x86_64 as a component of Red Hat Enterprise Linux HPC Node Optional (v. 6)
  • firefox-0:68.6.1-1.el6_10.x86_64 as a component of Red Hat Enterprise Linux Server (v. 6)
  • firefox-0:68.6.1-1.el6_10.x86_64 as a component of Red Hat Enterprise Linux Workstation (v. 6)
  • firefox-debuginfo-0:68.6.1-1.el6_10.i686 as a component of Red Hat Enterprise Linux Desktop (v. 6)
  • firefox-debuginfo-0:68.6.1-1.el6_10.i686 as a component of Red Hat Enterprise Linux Desktop Optional (v. 6)
  • firefox-debuginfo-0:68.6.1-1.el6_10.i686 as a component of Red Hat Enterprise Linux HPC Node Optional (v. 6)
  • firefox-debuginfo-0:68.6.1-1.el6_10.i686 as a component of Red Hat Enterprise Linux Server (v. 6)
  • firefox-debuginfo-0:68.6.1-1.el6_10.i686 as a component of Red Hat Enterprise Linux Server Optional (v. 6)
  • firefox-debuginfo-0:68.6.1-1.el6_10.i686 as a component of Red Hat Enterprise Linux Workstation (v. 6)
  • +7 more not shown

✅ 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 (5)