Copyright © 2012 Red Hat, Inc. All rights reserved. Low 2026-08-18T12:23:39 firefox: thunderbird: Integer overflow in the Graphics component 3.4 CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:L/I:N/A:N CWE-190

Integer overflow in the Graphics component. This vulnerability was fixed in Firefox 154, Firefox ESR 153.1, Thunderbird 154, and Thunderbird 153.1.

A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: Integer overflow in the Graphics component

Red Hat Product Security rates the severity of this flaw as determined by the Mozilla Foundation Security Advisory. Red Hat Enterprise Linux 10 Not affected firefox Red Hat Enterprise Linux 10 Not affected rhel10/firefox-flatpak Red Hat Enterprise Linux 10 Not affected rhel10/thunderbird-flatpak Red Hat Enterprise Linux 10 Not affected thunderbird Red Hat Enterprise Linux 6 Not affected firefox Red Hat Enterprise Linux 6 Not affected thunderbird Red Hat Enterprise Linux 7 Not affected firefox Red Hat Enterprise Linux 7 Not affected thunderbird Red Hat Enterprise Linux 8 Not affected firefox Red Hat Enterprise Linux 8 Not affected thunderbird Red Hat Enterprise Linux 9 Not affected firefox Red Hat Enterprise Linux 9 Not affected thunderbird https://www.cve.org/CVERecord?id=CVE-2026-74977 https://nvd.nist.gov/vuln/detail/CVE-2026-74977 https://www.mozilla.org/security/advisories/mfsa2026-77/#CVE-2026-74977 https://www.mozilla.org/security/advisories/mfsa2026-80/#CVE-2026-74977