---
id: CVE-2026-90353
title: |-
  In the Linux kernel, the following vulnerability has been resolved:

  wifi: mt76: mt7915: fix ext PHY use-after-free on register error path

  After mt7915_register_ext_phy() succeeded, a failure of the main PHY
  mt7915_init_debugfs() or mt7…
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  wifi: mt76: mt7915: fix ext PHY use-after-free on register error path

  After mt7915_register_ext_phy() succeeded, a failure of the main PHY
  mt7915_init_debugfs() or mt7…
severity: high
cvss: 7
cvssVector: 'CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H'
vendor: Linux
product: Linux
affected:
  - >-
    Linux >= 7b8e1ae886e45aed9274048f2836a70b75ecfa40 <
    aa55bec92ba7747dd08feff409f8074c5e052e71
  - >-
    Linux >= 7b8e1ae886e45aed9274048f2836a70b75ecfa40 <
    ad706fcf6255494613b94418e7243d98065dbeaf
  - >-
    Linux >= 7b8e1ae886e45aed9274048f2836a70b75ecfa40 <
    34058ad122f7524e33df8e38caba4b1d803b025a
  - >-
    Linux >= 7b8e1ae886e45aed9274048f2836a70b75ecfa40 <
    a7fd3bae8e11a7c00df6a5021d9ef248ae9f9bf5
  - >-
    Linux >= 7b8e1ae886e45aed9274048f2836a70b75ecfa40 <
    648f5f03ff50d4bd719106ace0cdf1d8be02cbdd
  - >-
    Linux >= 7b8e1ae886e45aed9274048f2836a70b75ecfa40 <
    15b960014f24dce5388d4a2e7274e6490cb3c421
  - Linux 5.19
published: '2026-09-17'
updated: '2026-09-18'
sourceUpdated: '2026-09-18T18:17:55.010'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-90353'
references:
  - url: 'https://git.kernel.org/stable/c/15b960014f24dce5388d4a2e7274e6490cb3c421'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/34058ad122f7524e33df8e38caba4b1d803b025a'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/648f5f03ff50d4bd719106ace0cdf1d8be02cbdd'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/a7fd3bae8e11a7c00df6a5021d9ef248ae9f9bf5'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/aa55bec92ba7747dd08feff409f8074c5e052e71'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/ad706fcf6255494613b94418e7243d98065dbeaf'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
tags:
  - nvd
  - cve.org
epss: 0.00151
epssPercentile: 0.0358
ingestedAt: '2026-09-17T16:21:47.814Z'
---

## Overview

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

wifi: mt76: mt7915: fix ext PHY use-after-free on register error path

After mt7915_register_ext_phy() succeeded, a failure of the main PHY
mt7915_init_debugfs() or mt7915_coredump_register() unwound through
free_phy2, which called ieee80211_free_hw() on the ext PHY hw while it
was still registered with mac80211, since mt76_unregister_device() only
unregisters the main hw. Unregister the ext PHY (thermal + phy + hw)
first and skip the redundant free.

## Remediation

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