A use-after-free vulnerability in the Linux kernel's netfilter: nf_tables component can be exploited to achieve local privilege escalation. Due to a race condition between nf_tables netlink control plane transaction and nft_set element garbage collection, it is possible to underflow the reference counter causing a use-after-free vulnerability. We recommend upgrading past commit 3e91b0ebd994635df2346353322ac51ce84ce6d8.
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 Any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer.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://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=3e91b0ebd994635df2346353322ac51ce84ce6d8 | patch mailing list vendor advisory issue tracking |
| https://kernel.dance/3e91b0ebd994635df2346353322ac51ce84ce6d8 | patch vendor advisory |
| https://lists.debian.org/debian-lts-announce/2023/10/msg00027.html | third party advisory mailing list |
| https://lists.debian.org/debian-lts-announce/2024/01/msg00004.html |