CVE-2026-90367wifi: mt76: mt7996: hold dev->mt76.mutex while disabling tx worker in SER
Updated under an hour ago ()
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No exploitation reported and no EPSS estimate yet.
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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.
- CVSS
- 8.8 HIGH (v3.1, CNA)CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- Weakness (CWE)
- Not given
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Linux
- NVD analysis
- Received
- Record last updated
- Sep 18, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Linux Linux linux:linux (from the name) | 27015b6fbcca836c6dbf196afc266e068af4aeec builds before 906ad486ba5c4933d82e1ebe0685656390a48450; 27015b6fbcca836c6dbf196afc266e068af4aeec builds before 594c4b7f89f9ea75dc9c50b5e4c4296db4a3d701; 27015b6fbcca836c6dbf196afc266e068af4aeec builds before 6190db312b8230813f529f014b26247c6d9800d0 | CNA record |
References
- https://git.kernel.org/stable/c/906ad486ba5c4933d82e1ebe0685656390a48450
- https://git.kernel.org/stable/c/594c4b7f89f9ea75dc9c50b5e4c4296db4a3d701
- https://git.kernel.org/stable/c/6190db312b8230813f529f014b26247c6d9800d0
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.