A use-after-free vulnerability can occur during WebGL operations. While this results in a potentially exploitable crash, the vulnerability is limited because the memory is freed and reused in a brief window of time during the freeing of the same callstack. This vulnerability affects Firefox < 60.
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 Any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer.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/mfsa2018-11/ | vendor advisory |
| http://www.securitytracker.com/id/1040896 | vdb entry third party advisory |
| https://usn.ubuntu.com/3645-1/ | third party advisory vendor advisory |
| http://www.securityfocus.com/bid/104139 | vdb entry third party advisory |
| https://bugzilla.mozilla.org/show_bug.cgi?id=1444086 | issue tracking permissions required third party advisory |