---
id: CVE-2026-90349
title: |-
  In the Linux kernel, the following vulnerability has been resolved:

  wifi: mt76: mt7996: fix out-of-bounds link array access in mt7996_tx()

  When mac80211 leaves the link unspecified, mt7996_tx() substitutes the
  primary link id of the st…
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  wifi: mt76: mt7996: fix out-of-bounds link array access in mt7996_tx()

  When mac80211 leaves the link unspecified, mt7996_tx() substitutes the
  primary link id of the st…
severity: none
vendor: Linux
product: Linux
affected:
  - >-
    Linux >= 1609b014aa29f9a2bf3aaa93f71de4a06725845e <
    637bb99cc766a858d744905e46638459ca128b6c
  - >-
    Linux >= 1609b014aa29f9a2bf3aaa93f71de4a06725845e <
    aff81505a84d27f83b4db8e039e813930cb23c2c
  - >-
    Linux >= 1609b014aa29f9a2bf3aaa93f71de4a06725845e <
    4330a0ef9f75a54fde3548432a9a698f06bab635
  - Linux 6.18
published: '2026-09-17'
updated: '2026-09-17'
sourceUpdated: '2026-09-17T17:17:33.700'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-90349'
references:
  - url: 'https://git.kernel.org/stable/c/4330a0ef9f75a54fde3548432a9a698f06bab635'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/637bb99cc766a858d744905e46638459ca128b6c'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/aff81505a84d27f83b4db8e039e813930cb23c2c'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
tags:
  - nvd
  - cve.org
ingestedAt: '2026-09-17T16:21:47.815Z'
epss: 0.00206
epssPercentile: 0.09439
---

## Overview

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

wifi: mt76: mt7996: fix out-of-bounds link array access in mt7996_tx()

When mac80211 leaves the link unspecified, mt7996_tx() substitutes the
primary link id of the station or vif. That value is
IEEE80211_LINK_UNSPECIFIED (0xf) until the first link has been added,
and it is then used unchecked to index vif->link_conf[],
mvif->mt76.link[] and sta->link[], all of which hold
IEEE80211_MLD_MAX_NUM_LINKS (15) entries.

Clamp the primary link id to the default link before using it, and use
the clamped value for the link_sta fallback as well.

## Remediation

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