CVE-2026-80936 wifi: mt76: mt7925: cancel mlo_pm_work on stop
A race condition in the mt7925 WiFi driver causes a kernel warning and potential instability when the device is stopped during a delayed power-save work queue operation.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-80936?
CVE-2026-80936 is a high-severity 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: mt7925: cancel mlo_pm_work on stop
mt7925 queues mlo_pm_work with a 5 second delay during multi-link power-save setup and never cancels it on the stop path. If the device is torn down inside that window, the work outlives the teardown and its timer fires afterwards, trying to queue onto the workqueue that is already gone:
workqueue: cannot queue mt7925_mlo_pm_work [mt7925_common] on wq phy0 WARNING: kernel/workqueue.c:2283 at __queue_work+0x59/0xa0, CPU#1: swapper/1/0 call_timer_fn+0x2a/0x140 __run_timers+0x203/0x330 run_timer_softirq+0x86/0xf0
mt7921 already has its own stop callback, so add one for mt7925 that cancels the work before calling mt792x_stop(). mt7925_ops backs both the PCIe and USB drivers, so this covers both.
Which versions are affected by CVE-2026-80936?
How do I fix CVE-2026-80936?
Apply the vendor's patch.
Is CVE-2026-80936 being exploited?
There is no known exploitation of CVE-2026-80936 in the wild and no public exploit code.
Sources
Also known as BELL-CVE-2026-80936, DEBIAN-CVE-2026-80936, GHSA-59xf-cqg5-4cpj, UBUNTU-CVE-2026-80936.