CVE-2026-90367

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.

Score

CVSS 3.1 8.8 High

Status

Received - 416baaa9-dc9f-4396-8d5f-8c081fb06d67

Published

2026-09-17

Last modified

2026-10-21

Affected products

• Linux Kernel (Linux)

References

• https://git.kernel.org/stable/c/bc4f4389f439e808185778d298da36976d13d415
• https://git.kernel.org/stable/c/69f23622533a4f054b5c8fdb226c3319ffa017b6
• https://git.kernel.org/stable/c/906ad486ba5c4933d82e1ebe0685656390a48450
• https://git.kernel.org/stable/c/594c4b7f89f9ea75dc9c50b5e4c4296db4a3d701
• https://git.kernel.org/stable/c/6190db312b8230813f529f014b26247c6d9800d0