During garbage collection extra operations were performed on a object that should not be. This could have led to a potentially exploitable crash. This vulnerability affects Firefox < 119, Firefox ESR < 115.4, and Thunderbird < 115.4.1.
The product reuses or references memory after it has been freed. At some point afterward, the memory may be allocated again and saved in another pointer, while the original pointer references a location somewhere within the new allocation. Any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer.
| Link | Tags |
|---|---|
| https://bugzilla.mozilla.org/show_bug.cgi?id=1852729 | vendor advisory issue tracking |
| https://www.mozilla.org/security/advisories/mfsa2023-45/ | vendor advisory |
| https://www.mozilla.org/security/advisories/mfsa2023-46/ | vendor advisory |
| https://www.mozilla.org/security/advisories/mfsa2023-47/ | vendor advisory |
| https://www.debian.org/security/2023/dsa-5535 | third party advisory mailing list |
| https://lists.debian.org/debian-lts-announce/2023/10/msg00037.html | third party advisory mailing list |
| https://www.debian.org/security/2023/dsa-5538 | third party advisory |
| https://lists.debian.org/debian-lts-announce/2023/10/msg00042.html | third party advisory mailing list |