Use-after-free in the CSS Parsing and Computation component. This vulnerability was fixed in Firefox 159, Firefox ESR 115.44, Firefox ESR 153.6, Thunderbird 159, and Thunderbird 153.6.
References 6
https://bugzilla.mozilla.org/show_bug.cgi?id=2079687
security@mozilla.org
https://www.mozilla.org/security/advisories/mfsa2026-118/
security@mozilla.org
https://www.mozilla.org/security/advisories/mfsa2026-119/
security@mozilla.org
https://www.mozilla.org/security/advisories/mfsa2026-120/
security@mozilla.org
https://www.mozilla.org/security/advisories/mfsa2026-121/
security@mozilla.org
https://www.mozilla.org/security/advisories/mfsa2026-122/
security@mozilla.org