Description (CNA)
In the Linux kernel, the following vulnerability has been resolved: wifi: mac80211: fix mesh fast xmit path deletion UAF mesh_fast_tx_cache() stores raw mesh_path pointers. Path deletion flushes the cache and then frees the path with kfree_rcu(), but a lookup that already holds the path can insert a new cache entry after the flush. The cache then points at freed memory. Set MESH_PATH_DELETED before flushing, and skip inserting a cache entry if the path or MPP path is already deleted. Check this under the cache walk lock so it is ordered with the flush. Use WRITE_ONCE() for the deletion flag updates because the cache check reads flags without taking state_lock.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected d5edb9ae8d568745f893c5c5fa3837d85311b131 before ebb7cba623d38733d33d79a8c7442f5ea04c0fb0; affected d5edb9ae8d568745f893c5c5fa3837d85311b131 before 0117f1aa189495e6f1ff608681678817995aee39; affected d5edb9ae8d568745f893c5c5fa3837d85311b131 before 128e800a41270ab197b1cc8043637a2924865608; affected d5edb9ae8d568745f893c5c5fa3837d85311b131 before 93da3ec938bfdcfb3899428f04c6d0c56fe32952; affected d5edb9ae8d568745f893c5c5fa3837d85311b131 before ee3aadc43ea69d98f666431e787137ac0badbb85 |
| Linux / Linux | affected 6.4; unaffected 0 before 6.4; unaffected 6.6.160 through 6.6.*; unaffected 6.12.113 through 6.12.*; unaffected 6.18.56 through 6.18.*; unaffected 7.2.10 through 7.2.*; unaffected 7.3 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/ebb7cba623d38733d33d79a8c7442f5ea04c0fb0
- https://git.kernel.org/stable/c/0117f1aa189495e6f1ff608681678817995aee39
- https://git.kernel.org/stable/c/128e800a41270ab197b1cc8043637a2924865608
- https://git.kernel.org/stable/c/93da3ec938bfdcfb3899428f04c6d0c56fe32952
- https://git.kernel.org/stable/c/ee3aadc43ea69d98f666431e787137ac0badbb85