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.
Attack Parameters
Attack Vector
Adjacent
Requires local network access
Attack Complexity
Low
Easy to exploit
Privileges Required
None
No privileges needed
User Interaction
None
No user interaction needed
Impact Assessment
Confidentiality
High
Complete data leak
Integrity
High
Complete data modification
Availability
High
Complete denial of service
CVSS Vector v3.1
References 3
https://git.kernel.org/stable/c/594c4b7f89f9ea75dc9c50b5e4c4296db4a3d701
416baaa9-dc9f-4396-8d5f-8c081fb06d67
https://git.kernel.org/stable/c/6190db312b8230813f529f014b26247c6d9800d0
416baaa9-dc9f-4396-8d5f-8c081fb06d67
https://git.kernel.org/stable/c/906ad486ba5c4933d82e1ebe0685656390a48450
416baaa9-dc9f-4396-8d5f-8c081fb06d67