The JavaScript garbage collector could mis-color cross-compartment objects if OOM conditions were detected at the right point between two passes. This could have led to memory corruption. This vulnerability affects Firefox < 130, Firefox ESR < 128.2, Firefox ESR < 115.15, Thunderbird < 128.2, and Thunderbird < 115.15.
https://www.mozilla.org/security/advisories/mfsa2024-44/
https://www.mozilla.org/security/advisories/mfsa2024-43/
https://www.mozilla.org/security/advisories/mfsa2024-41/
https://www.mozilla.org/security/advisories/mfsa2024-40/