When saving a page to PDF, certain font styles could have led to a potential use-after-free crash. This vulnerability affects Firefox < 126, Firefox ESR < 115.11, and Thunderbird < 115.11.
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 Any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer.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=1893270 | vendor advisory issue tracking exploit |
| https://www.mozilla.org/security/advisories/mfsa2024-21/ | vendor advisory |
| https://www.mozilla.org/security/advisories/mfsa2024-22/ | vendor advisory |
| https://www.mozilla.org/security/advisories/mfsa2024-23/ | vendor advisory |
| https://lists.debian.org/debian-lts-announce/2024/05/msg00010.html | mailing list |
| https://lists.debian.org/debian-lts-announce/2024/05/msg00012.html | mailing list |