mm/rmap.c in the Linux kernel before 5.19.7 has a use-after-free related to leaf anon_vma double reuse.
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 Any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer.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://bugs.chromium.org/p/project-zero/issues/detail?id=2351 | mailing list exploit third party advisory |
| https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.19.7 | mailing list patch vendor advisory |
| https://github.com/torvalds/linux/commit/2555283eb40df89945557273121e9393ef9b542b | third party advisory patch |
| https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=2555283eb40df89945557273121e9393ef9b542b | mailing list patch vendor advisory |
| https://googleprojectzero.blogspot.com/2022/12/exploiting-CVE-2022-42703-bringing-back-the-stack-attack.html | exploit third party advisory technical description |