CVE-2026-90367

Summary

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.

Affected Software

VendorProductVersion RangeStatus
LinuxLinux27015b6fbcca836c6dbf196afc266e068af4aeec < 906ad486ba5c4933d82e1ebe0685656390a48450affected
LinuxLinux27015b6fbcca836c6dbf196afc266e068af4aeec < 594c4b7f89f9ea75dc9c50b5e4c4296db4a3d701affected
LinuxLinux27015b6fbcca836c6dbf196afc266e068af4aeec < 6190db312b8230813f529f014b26247c6d9800d0affected
LinuxLinux6.4affected
LinuxLinux0 < 6.4unaffected
LinuxLinux6.18.52 <= 6.18.*unaffected
LinuxLinux7.2.6 <= 7.2.*unaffected
LinuxLinux7.3-rc1 <= *unaffected

Weaknesses

References