A use-after-free exists in the Linux Kernel in tc_new_tfilter that could allow a local attacker to gain privilege escalation. The exploit requires unprivileged user namespaces. We recommend upgrading past commit 04c2a47ffb13c29778e2a14e414ad4cb5a5db4b5
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 Any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer.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=04c2a47ffb13c29778e2a14e414ad4cb5a5db4b5 | patch vendor advisory |
| https://syzkaller.appspot.com/bug?id=2212474c958978ab86525fe6832ac8102c309ffc | exploit third party advisory patch |
| https://kernel.dance/#04c2a47ffb13c29778e2a14e414ad4cb5a5db4b5 | exploit third party advisory patch |
| https://security.netapp.com/advisory/ntap-20220506-0007/ | third party advisory |
| http://packetstormsecurity.com/files/167386/Kernel-Live-Patch-Security-Notice-LSN-0086-1.html | vdb entry third party advisory |