wifi: mt76: mt7996: hold dev->mt76.mutex while disabling tx worker in SER (CVE-2026-90367) | HOL Guard CVE

Unknown severity · Source severity not reportedCVE-2026-90367

wifi: mt76: mt7996: hold dev->mt76.mutex while disabling tx worker in SER

Answer in brief

CVE-2026-90367 records a Unknown severity vulnerability in wifi: mt76: mt7996: hold dev->mt76.mutex while disabling tx worker in SER. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Sep 17, 2026Updated Sep 17, 2026Source checked Sep 17, 2026First seen by HOL Sep 17, 2026Material review Sep 17, 2026

Upstream Advisory

Key facts

Risk: Unknown severitySource severity not reported
Exploitation: Not marked as known exploited
Affected software: 2 mapped packages or products
Fix availability: Available

Why this deserves its current priority

A CVSS score is not reported in the current record. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
Package	Affected range	Fixed version
Linux/Linuxgeneric	>=27015b6fbcca836c6dbf196afc266e068af4aeec <906ad486ba5c4933d82e1ebe0685656390a48450 \|\| >=27015b6fbcca836c6dbf196afc266e068af4aeec <594c4b7f89f9ea75dc9c50b5e4c4296db4a3d701 \|\| >=27015b6fbcca836c6dbf196afc266e068af4aeec <6190db312b8230813f529f014b26247c6d9800d0	906ad486ba5c4933d82e1ebe0685656390a48450, 594c4b7f89f9ea75dc9c50b5e4c4296db4a3d701, 6190db312b8230813f529f014b26247c6d9800d0
Linux/Linuxgeneric	6.4	Not reported

Recommended response

Check inventory. Check lockfiles and deployed manifests for Linux/Linux, Linux/Linux.
Review the reported fix. Update Linux/Linux to 906ad486ba5c4933d82e1ebe0685656390a48450 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

Published upstream
Sep 17, 2026
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Sep 17, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Sep 17, 2026

Sources and claim methodology

Upstream source 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.

Quoted source text, attributed separately from HOL analysis.