CVE-2026-80938 wifi: mt76: mt7615: avoid waiting for mac work under the mt76 mutex
A race condition in the mt7615 Wi-Fi driver causes a deadlock during suspend, leading to a denial of service for local attackers.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-80938?
CVE-2026-80938 is a vulnerability in Linux, published on 11 Sep 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Official 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.
Which versions are affected by CVE-2026-80938?
How do I fix CVE-2026-80938?
Apply the vendor's patch.
Is CVE-2026-80938 being exploited?
There is no known exploitation of CVE-2026-80938 in the wild and no public exploit code.
Sources
Also known as AZL-100602, BELL-CVE-2026-80938, DEBIAN-CVE-2026-80938, GHSA-pv6c-cxx7-759w, UBUNTU-CVE-2026-80938.