CVE-2026-90367
Description
AI Translation Available
In the Linux kernel, the following vulnerability has been resolved:
wifi: mt76: mt7996: hold dev->mt76.mutex while disabling tx worker in SER
mt7996_mac_reset_work() parked the tx worker and disabled the RX/TX NAPIs
before taking dev->mt76.mutex. mt76_worker_disable()/_enable() are plain
kthread park/unpark, not refcounted, and __mt76_set_channel() toggles the
same worker and the MT76_RESET bit under the mutex. An L1 SER racing a
channel switch could therefore have the worker unparked and MT76_RESET
cleared while the reset path resets the DMA rings, corrupting descriptors
or tokens. Take the mutex before disabling the worker, as mt7915 does.
https://git.kernel.org/stable/c/594c4b7f89f9ea75dc9c50b5e4c4296db4a3d701
https://git.kernel.org/stable/c/6190db312b8230813f529f014b26247c6d9800d0
https://git.kernel.org/stable/c/906ad486ba5c4933d82e1ebe0685656390a48450