The vulnerability of the GC component in Firefox ESR web browsers, Firefox browsers, and the Thunderbird email client allows a hacker to trigger a service failure.

The vulnerability of the GC component in Firefox ESR web browsers, Firefox browsers, and the Thunderbird email client is related to the use of memory after it is freed. Exploiting this vulnerability can allow an attacker to cause service interruptions...

CVE-2026-74937

A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: Use-after-free in the JavaScript: GC component...

CVE-2026-74938

A mitigation bypass in the JavaScript: GC component of Firefox and Thunderbird allows remote attackers to bypass memory-protection mitigations, potentially leading to arbitrary code execution. CVSS 9.1 (CRITICAL). Fixed in Firefox 154, Firefox ESR 153.1, Thunderbird 154, and Thunderbird 153.1 . S...

firefox: thunderbird: Use-after-free in the JavaScript: GC component

A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: Use-after-free in the JavaScript: GC component...

SUSE CVE-2026-2758

Use-after-free in the JavaScript: GC component. This vulnerability was fixed in Firefox 148, Firefox ESR 115.33, Firefox ESR 140.8, Thunderbird 148, and Thunderbird 140.8...

SUSE CVE-2026-2802

Race condition in the JavaScript: GC component. This vulnerability was fixed in Firefox 148 and Thunderbird 148...

CVE-2026-2797 Use-after-free in the JavaScript: GC component

Use-after-free in the JavaScript: GC component. This vulnerability was fixed in Firefox 148 and Thunderbird 148...

EUVD-2026-8480

Use-after-free in the JavaScript: GC component. This vulnerability affects Firefox 148, Firefox ESR 115.33, and Firefox ESR 140.8...

PT-2026-21728

Name of the Vulnerable Software and Affected Versions Firefox versions prior to 148 Thunderbird versions prior to 148 Description A use-after-free issue exists in the JavaScript: GC component. This condition can occur when memory is accessed after it has been freed, potentially leading to crashes...

firefox: thunderbird: Use-after-free in the JavaScript: GC component

A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: Use-after-free in the JavaScript: GC component...

firefox: thunderbird: Use-after-free in the JavaScript: GC component

A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: Use-after-free in the JavaScript: GC component...

firefox: thunderbird: Use-after-free in the JavaScript: GC component

A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: Use-after-free in the JavaScript: GC component...