---
id: CVE-2026-90376
title: |-
  In the Linux kernel, the following vulnerability has been resolved:

  wifi: mt76: mt7996: fix MLD ID in MAC TXD and HIF TXP

  Problem:
  MCU command timeout while the firmware state is normal, and the
  firmware keeps showing the error log "ER…
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  wifi: mt76: mt7996: fix MLD ID in MAC TXD and HIF TXP

  Problem:
  MCU command timeout while the firmware state is normal, and the
  firmware keeps showing the error log "ER…
severity: medium
vendor: Linux
product: Linux
affected:
  - >-
    Linux >= d6f6b3a65660d183ef33f5a6582fd3b47174fe5a <
    5183b9f092fc0041618f38f895bd0ad860c26ca9
  - >-
    Linux >= 85cd5534a3f2ec93e7d88713a77df5b4255520df <
    0a951ff6704db7b46c3f6d03b77e6053122be8ab
  - >-
    Linux >= 85cd5534a3f2ec93e7d88713a77df5b4255520df <
    ce35ecffc96e6d097d27b6fe30677a2cfe2e0461
  - Linux >= 6.18.33 < 6.18.52
  - Linux 6.19
published: '2026-09-17'
updated: '2026-09-17'
sourceUpdated: '2026-09-17T17:17:36.823'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-90376'
references:
  - url: 'https://git.kernel.org/stable/c/0a951ff6704db7b46c3f6d03b77e6053122be8ab'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/5183b9f092fc0041618f38f895bd0ad860c26ca9'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/ce35ecffc96e6d097d27b6fe30677a2cfe2e0461'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: >-
      https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-90376.json
  - url: 'https://access.redhat.com/security/cve/CVE-2026-90376'
  - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2536742'
  - url: 'https://www.cve.org/CVERecord?id=CVE-2026-90376'
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2026-90376'
  - url: >-
      https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-90376.mbox
tags:
  - nvd
  - cve.org
  - csaf
  - vex
  - red-hat
ingestedAt: '2026-09-17T16:21:47.807Z'
epss: 0.00206
epssPercentile: 0.1065
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-835
---

## Overview

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

wifi: mt76: mt7996: fix MLD ID in MAC TXD and HIF TXP

Problem:
MCU command timeout while the firmware state is normal, and the
firmware keeps showing the error log "ERROR!! NO PAUSE...".

Root cause:
If the MLD_ID field in the TXD is neither the primary link id nor the
secondary link id, it may lead to a firmware busy loop when the third
link is in power saving mode.

Remap frames directed to a third link to the primary link wcid. Since
TX status events and txfree completions carry the wcid the firmware
saw, use the remapped wcid for packet id tracking and non-AQL packet
accounting as well, while the frame keeps its original link context
for addressing, band and OMAC selection.

## Remediation

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

## Vendor advisories

- **Red Hat VEX** · Moderate · updated 2026-10-20 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-90376.json)