Description
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.
References5
- git.kernel.org/stable/c/594c4b7f89f9ea75dc9c50b5e4c4296db4a3d701
- git.kernel.org/stable/c/6190db312b8230813f529f014b26247c6d9800d0
- git.kernel.org/stable/c/69f23622533a4f054b5c8fdb226c3319ffa017b6
- git.kernel.org/stable/c/906ad486ba5c4933d82e1ebe0685656390a48450
- git.kernel.org/stable/c/bc4f4389f439e808185778d298da36976d13d415
Metrics
- CVSS 3.1
-
8.8
HIGH
Score source: CNA
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - EPSS — exploit probability
- 0% percentile: 17 · as of 8 November 2026
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