Description
A use-after-free vulnerability in the Linux Kernel traffic control index filter (tcindex) can be exploited to achieve local privilege escalation. The tcindex_delete function which does not properly deactivate filters in case of a perfect hashes while deleting the underlying structure which can later lead to double freeing the structure. A local attacker user can use this vulnerability to elevate its privileges to root. We recommend upgrading past commit 8c710f75256bb3cf05ac7b1672c82b92c43f3d28 https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/ .
Affected products
Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.
Linux Linux Kernel
Default version status: unaffected
3.8.0 to < 4.14.308affected4.15.0 to < 4.19.276affected4.20.0 to < 5.4.235affected5.5.0 to < 5.10.173affected5.11.0 to < 5.15.100affected5.16.0 to < 6.1.18affected6.2.0 to < 6.2.5affected6.3.0unaffected8c710f75256bb3cf05ac7b1672c82b92c43f3d28unaffected
References
- https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=8c710f75256bb3cf05ac7b1672c82b92c43f3d28 ↗
- https://kernel.dance/#8c710f75256bb3cf05ac7b1672c82b92c43f3d28 ↗
- https://lists.debian.org/debian-lts-announce/2023/05/msg00005.html ↗
- https://lists.debian.org/debian-lts-announce/2023/05/msg00006.html ↗
- https://security.netapp.com/advisory/ntap-20230601-0001/ ↗