---
id: CVE-2026-90374
title: |-
  In the Linux kernel, the following vulnerability has been resolved:

  wifi: mt76: mt7996: validate RX band_idx before dereferencing phys[]

  band_idx comes from a 2-bit descriptor field (0-3) and was used directly
  to index dev->mt76.phys[]…
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  wifi: mt76: mt7996: validate RX band_idx before dereferencing phys[]

  band_idx comes from a 2-bit descriptor field (0-3) and was used directly
  to index dev->mt76.phys[]…
severity: medium
vendor: Linux
product: Linux
affected:
  - >-
    Linux >= 98686cd21624c75a043e96812beadddf4f6f48e5 <
    535091c587268cc783608642838a655d828eefdd
  - >-
    Linux >= 98686cd21624c75a043e96812beadddf4f6f48e5 <
    0f53ece876e1f3bbb3e18f48afc4af1ee967b16c
  - >-
    Linux >= 98686cd21624c75a043e96812beadddf4f6f48e5 <
    b1c5cf8903bec5476a2233b4e45287b9a2213e02
  - >-
    Linux >= 98686cd21624c75a043e96812beadddf4f6f48e5 <
    2243778a5fae8329ab5f18e7adcd7e03b911a1b7
  - Linux 6.2
published: '2026-09-17'
updated: '2026-09-17'
sourceUpdated: '2026-09-17T17:17:36.613'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-90374'
references:
  - url: 'https://git.kernel.org/stable/c/0f53ece876e1f3bbb3e18f48afc4af1ee967b16c'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/2243778a5fae8329ab5f18e7adcd7e03b911a1b7'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/535091c587268cc783608642838a655d828eefdd'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/b1c5cf8903bec5476a2233b4e45287b9a2213e02'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: >-
      https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-90374.json
  - url: 'https://access.redhat.com/security/cve/CVE-2026-90374'
  - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2536656'
  - url: 'https://www.cve.org/CVERecord?id=CVE-2026-90374'
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2026-90374'
  - url: >-
      https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-90374.mbox
  - url: 'https://git.kernel.org/stable/c/493a029c205a994644327d554f0cfeb9651aba7c'
tags:
  - nvd
  - cve.org
  - csaf
  - vex
  - red-hat
ingestedAt: '2026-09-17T16:21:47.808Z'
epss: 0.00209
epssPercentile: 0.1097
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-787
---

## Overview

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

wifi: mt76: mt7996: validate RX band_idx before dereferencing phys[]

band_idx comes from a 2-bit descriptor field (0-3) and was used directly
to index dev->mt76.phys[] (size __MT_MAX_BAND == 3) and dereference the
result. A corrupt or reserved descriptor value could index out of bounds
or hit a NULL phy on parts with fewer bands. Reject invalid band indices,
mirroring mt7996_rx_get_wcid().

## 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-2026-90374.json)