---
id: CVE-2026-90375
title: |-
  In the Linux kernel, the following vulnerability has been resolved:

  wifi: mt76: fix non-AQL packet accounting for MLO stations

  __mt76_tx_queue_skb() overrides the wcid passed by the driver with
  sta->drv_priv, so the wcid might incorrec…
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  wifi: mt76: fix non-AQL packet accounting for MLO stations

  __mt76_tx_queue_skb() overrides the wcid passed by the driver with
  sta->drv_priv, so the wcid might incorrec…
severity: medium
vendor: Linux
product: Linux
affected:
  - >-
    Linux >= e1378e5228aaa1bf6bb253a379c7de1722a94e00 <
    f85f6933cc170155f1c7c2dffdd014965787c71b
  - >-
    Linux >= e1378e5228aaa1bf6bb253a379c7de1722a94e00 <
    fc7fae55255ccbde009232e84b102d2782a69ecf
  - >-
    Linux >= e1378e5228aaa1bf6bb253a379c7de1722a94e00 <
    186c957ac3325aefb982567ffdd3654b283688a7
  - >-
    Linux >= e1378e5228aaa1bf6bb253a379c7de1722a94e00 <
    8ae659743ba936b22ecb4620815887728e2820d6
  - Linux 5.10
published: '2026-09-17'
updated: '2026-09-17'
sourceUpdated: '2026-09-17T17:17:36.720'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-90375'
references:
  - url: 'https://git.kernel.org/stable/c/186c957ac3325aefb982567ffdd3654b283688a7'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/8ae659743ba936b22ecb4620815887728e2820d6'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/f85f6933cc170155f1c7c2dffdd014965787c71b'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/fc7fae55255ccbde009232e84b102d2782a69ecf'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: >-
      https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-90375.json
  - url: 'https://access.redhat.com/security/cve/CVE-2026-90375'
  - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2536540'
  - url: 'https://www.cve.org/CVERecord?id=CVE-2026-90375'
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2026-90375'
  - url: >-
      https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-90375.mbox
  - url: 'https://git.kernel.org/stable/c/2c321f86846ead00552bc65f73f5b5f1f81d4023'
tags:
  - nvd
  - cve.org
  - csaf
  - vex
  - red-hat
ingestedAt: '2026-09-17T16:21:47.808Z'
epss: 0.00168
epssPercentile: 0.06155
cvss: 5.5
cvssVector: 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H'
cvssSource: vendor
cwe:
  - CWE-770
---

## Overview

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

wifi: mt76: fix non-AQL packet accounting for MLO stations

__mt76_tx_queue_skb() overrides the wcid passed by the driver with
sta->drv_priv, so the wcid might incorrectly be changed after TX,
causing wcid->non_aql_packets to be counted on the wrong wcid. For
example, on the AP side, if a station's setup link is the 5G link and
the station uses 2G to transmit a frame, the value of non_aql_packets
is increased on the 5G wcid but decreased on the 2G wcid. Once the
inflated counter exceeds MT_MAX_NON_AQL_PKT, the TX scheduler
permanently refuses to service the station.

Drop the reassignment and account on the wcid used for transmission.
This also records the actual wcid in the queue entry.

## Remediation

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

## Vendor advisories

- **Red Hat VEX** · Moderate · affected: Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 8, Red Hat Enterprise Linux 9, Red Hat OpenShift Container Platform 4 · no fix planned: Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 8, Red Hat Enterprise Linux 9, Red Hat OpenShift Container Platform 4 · updated 2026-10-20 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-90375.json)