CVE-2026-93149

Description

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.

References

• https://git.kernel.org/stable/c/158438cd6ad69d6dd7d871582c38baf22169fede
• https://git.kernel.org/stable/c/1c2a4ab6efa26415dd131b8c222e7893fda03435
• https://git.kernel.org/stable/c/2817431a61557f46dc63077b7cc126bc906c242e
• https://git.kernel.org/stable/c/c40ba47f2ba1951cb32ea048667ed014d36a5749
• https://git.kernel.org/stable/c/d131027054a8dd922dda01fe8d381abe5af4970b