---
id: CVE-2026-90356
title: |-
  In the Linux kernel, the following vulnerability has been resolved:

  wifi: mt76: mt7996: free vif links after clearing wcid entries on full reset

  mt7996_mac_reset_vif_iter() queues non-default vif links for kfree_rcu
  while dev->wcid[] s…
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  wifi: mt76: mt7996: free vif links after clearing wcid entries on full reset

  mt7996_mac_reset_vif_iter() queues non-default vif links for kfree_rcu
  while dev->wcid[] s…
severity: none
vendor: Linux
product: Linux
affected:
  - >-
    Linux >= ace5d3b6b49e8391beb4d7244348ba7da5298878 <
    2b10eb3636d0c4cb6b763e045ec1294dbd70f5ad
  - >-
    Linux >= ace5d3b6b49e8391beb4d7244348ba7da5298878 <
    8826d7a5e2dd727aa96456ccd58b33d2b080e935
  - >-
    Linux >= ace5d3b6b49e8391beb4d7244348ba7da5298878 <
    7e4208e9f6a876c2b7d28fdb6b86dff3b05db2f7
  - Linux 6.18
published: '2026-09-17'
updated: '2026-09-17'
sourceUpdated: '2026-09-17T17:17:34.480'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-90356'
references:
  - url: 'https://git.kernel.org/stable/c/2b10eb3636d0c4cb6b763e045ec1294dbd70f5ad'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/7e4208e9f6a876c2b7d28fdb6b86dff3b05db2f7'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/8826d7a5e2dd727aa96456ccd58b33d2b080e935'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
tags:
  - nvd
  - cve.org
ingestedAt: '2026-09-17T16:21:47.813Z'
epss: 0.00198
epssPercentile: 0.09842
---

## Overview

In the Linux kernel, the following vulnerability has been resolved:

wifi: mt76: mt7996: free vif links after clearing wcid entries on full reset

mt7996_mac_reset_vif_iter() queues non-default vif links for kfree_rcu
while dev->wcid[] still holds pointers to the wcid embedded in each
freed link; mt76_reset_device() then dereferences those entries and
runs mt76_wcid_cleanup() on them. If a grace period elapses in between,
the cleanup operates on freed memory.

Run mt76_reset_device() first, so the wcid entries are cleaned up and
cleared while the links are still valid.

## Remediation

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