CVE-2026-93149

Summary

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 Software

VendorProductVersion RangeStatus
LinuxLinuxbd18de517923903a177508fc8813f44e717b1c00 < d131027054a8dd922dda01fe8d381abe5af4970baffected
LinuxLinuxbd18de517923903a177508fc8813f44e717b1c00 < c40ba47f2ba1951cb32ea048667ed014d36a5749affected
LinuxLinuxbd18de517923903a177508fc8813f44e717b1c00 < 2817431a61557f46dc63077b7cc126bc906c242eaffected
LinuxLinuxbd18de517923903a177508fc8813f44e717b1c00 < e7fccad2c8e6ef6bbafe509c95869d161d0f466baffected
LinuxLinuxbd18de517923903a177508fc8813f44e717b1c00 < 1c2a4ab6efa26415dd131b8c222e7893fda03435affected
LinuxLinuxbd18de517923903a177508fc8813f44e717b1c00 < 158438cd6ad69d6dd7d871582c38baf22169fedeaffected
LinuxLinux78bf3c6131488b00386acd9aff1ea4e6c44fa38eaffected
LinuxLinuxa9028333001f793b2724e8be42fce3336de2cf1caffected
LinuxLinux7019c9f385b264a2d6f685028268422d55087e37affected
LinuxLinux5.4.129 < 5.5affected
LinuxLinux5.10.47 < 5.11affected
LinuxLinux5.12.14 < 5.13affected
LinuxLinux5.13affected
LinuxLinux0 < 5.13unaffected
LinuxLinux6.1.188 <= 6.1.*unaffected
LinuxLinux6.6.157 <= 6.6.*unaffected
LinuxLinux6.12.110 <= 6.12.*unaffected
LinuxLinux6.18.52 <= 6.18.*unaffected
LinuxLinux7.2.6 <= 7.2.*unaffected
LinuxLinux7.3-rc1 <= *unaffected

Weaknesses

References