A missing check related to tex units could have led to a use-after-free and potentially exploitable crash.<br />*Note*: This advisory was added on December 13th, 2022 after we better understood the impact of the issue. The fix was included in the original release of Firefox 105. This vulnerability affects Firefox ESR < 102.6, Firefox < 105, and Thunderbird < 102.6.
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 Any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer.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://www.mozilla.org/security/advisories/mfsa2022-52/ | vendor advisory |
| https://www.mozilla.org/security/advisories/mfsa2022-53/ | vendor advisory |
| https://www.mozilla.org/security/advisories/mfsa2022-40/ | vendor advisory |
| https://bugzilla.mozilla.org/show_bug.cgi?id=1749292 | issue tracking permissions required |
| https://security.gentoo.org/glsa/202305-06 | vendor advisory |
| https://security.gentoo.org/glsa/202305-13 | vendor advisory |