Description (CNA)
In the Linux kernel, the following vulnerability has been resolved: wifi: mac80211_hwsim: avoid NULL skb in stop queue drain mac80211_hwsim_stop() drops any frames left in data->pending. The loop currently checks skb_queue_empty() and then dequeues separately. That split is racy with TX status handling, which can remove a pending frame under the queue lock. If the last entry is removed after the empty check, skb_dequeue() returns NULL and the stop path passes that NULL skb to ieee80211_free_txskb(). Use skb_dequeue() as the loop condition instead. The dequeue result is the object that stop owns and frees, and a concurrent status completion that empties the queue simply makes the loop terminate.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected bd18de517923903a177508fc8813f44e717b1c00 before d131027054a8dd922dda01fe8d381abe5af4970b; affected bd18de517923903a177508fc8813f44e717b1c00 before c40ba47f2ba1951cb32ea048667ed014d36a5749; affected bd18de517923903a177508fc8813f44e717b1c00 before 2817431a61557f46dc63077b7cc126bc906c242e; affected bd18de517923903a177508fc8813f44e717b1c00 before e7fccad2c8e6ef6bbafe509c95869d161d0f466b; affected bd18de517923903a177508fc8813f44e717b1c00 before 1c2a4ab6efa26415dd131b8c222e7893fda03435; affected bd18de517923903a177508fc8813f44e717b1c00 before 158438cd6ad69d6dd7d871582c38baf22169fede; affected 78bf3c6131488b00386acd9aff1ea4e6c44fa38e; affected a9028333001f793b2724e8be42fce3336de2cf1c; affected 7019c9f385b264a2d6f685028268422d55087e37; affected 5.4.129 before 5.5; affected 5.10.47 before 5.11; affected 5.12.14 before 5.13 |
| Linux / Linux | affected 5.13; unaffected 0 before 5.13; unaffected 6.1.188 through 6.1.*; unaffected 6.6.157 through 6.6.*; unaffected 6.12.110 through 6.12.*; unaffected 6.18.52 through 6.18.*; unaffected 7.2.6 through 7.2.*; unaffected 7.3 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/d131027054a8dd922dda01fe8d381abe5af4970b
- https://git.kernel.org/stable/c/c40ba47f2ba1951cb32ea048667ed014d36a5749
- https://git.kernel.org/stable/c/2817431a61557f46dc63077b7cc126bc906c242e
- https://git.kernel.org/stable/c/e7fccad2c8e6ef6bbafe509c95869d161d0f466b
- https://git.kernel.org/stable/c/1c2a4ab6efa26415dd131b8c222e7893fda03435
- https://git.kernel.org/stable/c/158438cd6ad69d6dd7d871582c38baf22169fede