RHSA-2025:17378HighCVSS 7.5

Red Hat Security Advisory: firefox security update

Published
October 6, 2025
Last Modified
July 31, 2026

🔗 CVE IDs covered (8)

CVE-2025-10527 →CVE-2025-10528 →CVE-2025-10529 →CVE-2025-10532 →CVE-2025-10533 →CVE-2025-10536 →CVE-2025-10537 →CVE-2024-12224 →

📋 Description

CVE-2024-12224 — idna: idna accepts Punycode labels that do not produce any non-ASCII when decoded CVE-2025-10527 — firefox: thunderbird: Sandbox escape due to use-after-free in the Graphics: Canvas2D component CVE-2025-10528 — firefox: thunderbird: Sandbox escape due to undefined behavior, invalid pointer in the Graphics: Canvas2D component CVE-2025-10529 — firefox: thunderbird: Same-origin policy bypass in the Layout component CVE-2025-10532 — firefox: thunderbird: Incorrect boundary conditions in the JavaScript: GC component CVE-2025-10533 — firefox: thunderbird: Integer overflow in the SVG component CVE-2025-10536 — firefox: thunderbird: Information disclosure in the Networking: Cache component CVE-2025-10537 — firefox: thunderbird: Memory safety bugs fixed in Firefox ESR 140.3, Thunderbird ESR 140.3, Firefox 143 and Thunderbird 143

🎯 Affected products18

  • Red Hat Enterprise Linux AppStream EUS (v.9.4)
  • firefox-0:140.3.0-1.el9_4.aarch64 as a component of Red Hat Enterprise Linux AppStream EUS (v.9.4)
  • firefox-0:140.3.0-1.el9_4.ppc64le as a component of Red Hat Enterprise Linux AppStream EUS (v.9.4)
  • firefox-0:140.3.0-1.el9_4.s390x as a component of Red Hat Enterprise Linux AppStream EUS (v.9.4)
  • firefox-0:140.3.0-1.el9_4.src as a component of Red Hat Enterprise Linux AppStream EUS (v.9.4)
  • firefox-0:140.3.0-1.el9_4.x86_64 as a component of Red Hat Enterprise Linux AppStream EUS (v.9.4)
  • firefox-debuginfo-0:140.3.0-1.el9_4.aarch64 as a component of Red Hat Enterprise Linux AppStream EUS (v.9.4)
  • firefox-debuginfo-0:140.3.0-1.el9_4.ppc64le as a component of Red Hat Enterprise Linux AppStream EUS (v.9.4)
  • firefox-debuginfo-0:140.3.0-1.el9_4.s390x as a component of Red Hat Enterprise Linux AppStream EUS (v.9.4)
  • firefox-debuginfo-0:140.3.0-1.el9_4.x86_64 as a component of Red Hat Enterprise Linux AppStream EUS (v.9.4)
  • firefox-debugsource-0:140.3.0-1.el9_4.aarch64 as a component of Red Hat Enterprise Linux AppStream EUS (v.9.4)
  • firefox-debugsource-0:140.3.0-1.el9_4.ppc64le as a component of Red Hat Enterprise Linux AppStream EUS (v.9.4)
  • firefox-debugsource-0:140.3.0-1.el9_4.s390x as a component of Red Hat Enterprise Linux AppStream EUS (v.9.4)
  • firefox-debugsource-0:140.3.0-1.el9_4.x86_64 as a component of Red Hat Enterprise Linux AppStream EUS (v.9.4)
  • firefox-x11-0:140.3.0-1.el9_4.aarch64 as a component of Red Hat Enterprise Linux AppStream EUS (v.9.4)
  • firefox-x11-0:140.3.0-1.el9_4.ppc64le as a component of Red Hat Enterprise Linux AppStream EUS (v.9.4)
  • firefox-x11-0:140.3.0-1.el9_4.s390x as a component of Red Hat Enterprise Linux AppStream EUS (v.9.4)
  • firefox-x11-0:140.3.0-1.el9_4.x86_64 as a component of Red Hat Enterprise Linux AppStream EUS (v.9.4)

✅ 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 Workaround: Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability.

🔗 References (10)