CVE-2025-1012 Information

Description

A race during concurrent delazification could have led to a use-after-free. This vulnerability affects Firefox < 135 Firefox ESR < 115.20 Firefox ESR < 128.7 Thunderbird < 128.7 and Thunderbird < 135.

Reference

https://bugzilla.mozilla.org/show_bug.cgi?id=1939710 https://www.mozilla.org/security/advisories/mfsa2025-07/ https://www.mozilla.org/security/advisories/mfsa2025-08/ https://www.mozilla.org/security/advisories/mfsa2025-09/ https://www.mozilla.org/security/advisories/mfsa2025-10/ https://www.mozilla.org/security/advisories/mfsa2025-11/