CVE-2026-80938
Description
In the Linux kernel, the following vulnerability has been resolved: wifi: mt76: mt7615: avoid waiting for mac work under the mt76 mutex mt7615_suspend() acquired the mt76 mutex and then called cancel_delayed_work_sync() on mac_work. mt7615_mac_work() acquires the same mutex via mt7615_mutex_acquire() at the top of the worker, so if mac_work is already running and blocked on the mutex, the suspend path deadlocks waiting for the work it holds the mutex against. Flush scan_work and mac_work before taking the mutex, matching the suspend paths in mt7921 and mt7925. scan_work only takes the mt76 spinlock, but moving it keeps the sequence consistent. This also keeps mac_work from running over an already suspended HIF, which the previous split (async cancel under the lock, sync cancel after release) would have allowed.
How to fix
- Linux Linux36c73b86a09f0e51c0f81a75c8945b6c5557ff27, 33d29aeb4c0eede92622a7d04ea492b94c30f089, ef2ec8b537c3a54e241d693bd03016f80d0d4484, 3114d479f2a1d31b2e6214c395794c6e5715e579, 4506e229b2e468b8c64bcf52c50c41a3bf2e633e, 44be85af3e1772ffb3332feafedad2a73b22854c, bda8324270b1ac91bfba1df8928e0570e29759e8 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| Linux Linux | c6bf20109a3fae92402cb76ad709ec5256bcd169 ≤ v < 36c73b86a09f0e51c0f81a75c8945b6c5557ff27, c6bf20109a3fae92402cb76ad709ec5256bcd169 ≤ v < 33d29aeb4c0eede92622a7d04ea492b94c30f089, c6bf20109a3fae92402cb76ad709ec5256bcd169 ≤ v < ef2ec8b537c3a54e241d693bd03016f80d0d4484, c6bf20109a3fae92402cb76ad709ec5256bcd169 ≤ v < 3114d479f2a1d31b2e6214c395794c6e5715e579, c6bf20109a3fae92402cb76ad709ec5256bcd169 ≤ v < 4506e229b2e468b8c64bcf52c50c41a3bf2e633e, c6bf20109a3fae92402cb76ad709ec5256bcd169 ≤ v < 44be85af3e1772ffb3332feafedad2a73b22854c, c6bf20109a3fae92402cb76ad709ec5256bcd169 ≤ v < bda8324270b1ac91bfba1df8928e0570e29759e8, 5.8 | 36c73b86a09f0e51c0f81a75c8945b6c5557ff27, 33d29aeb4c0eede92622a7d04ea492b94c30f089, ef2ec8b537c3a54e241d693bd03016f80d0d4484, 3114d479f2a1d31b2e6214c395794c6e5715e579, 4506e229b2e468b8c64bcf52c50c41a3bf2e633e, 44be85af3e1772ffb3332feafedad2a73b22854c, bda8324270b1ac91bfba1df8928e0570e29759e8 |
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