---
id: CVE-2026-90367
title: |-
  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->…
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->…
severity: high
cvss: 8.8
cvssVector: 'CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H'
vendor: Linux
product: Linux
affected:
  - >-
    Linux >= 27015b6fbcca836c6dbf196afc266e068af4aeec <
    906ad486ba5c4933d82e1ebe0685656390a48450
  - >-
    Linux >= 27015b6fbcca836c6dbf196afc266e068af4aeec <
    594c4b7f89f9ea75dc9c50b5e4c4296db4a3d701
  - >-
    Linux >= 27015b6fbcca836c6dbf196afc266e068af4aeec <
    6190db312b8230813f529f014b26247c6d9800d0
  - Linux 6.4
published: '2026-09-17'
updated: '2026-09-18'
sourceUpdated: '2026-09-18T18:17:55.483'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-90367'
references:
  - url: 'https://git.kernel.org/stable/c/594c4b7f89f9ea75dc9c50b5e4c4296db4a3d701'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/6190db312b8230813f529f014b26247c6d9800d0'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/906ad486ba5c4933d82e1ebe0685656390a48450'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
tags:
  - nvd
  - cve.org
epss: 0.00239
epssPercentile: 0.15225
ingestedAt: '2026-09-17T16:21:47.810Z'
---

## Overview

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.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.