---
id: CVE-2026-90020
title: |-
  In the Linux kernel, the following vulnerability has been resolved:

  USB: gadget: fix NULL pointer dereference in gadget_dev_ioctl()

  gadget_dev_ioctl() reads dev->gadget before acquiring dev->lock, but
  dev->state is checked after acquir…
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  USB: gadget: fix NULL pointer dereference in gadget_dev_ioctl()

  gadget_dev_ioctl() reads dev->gadget before acquiring dev->lock, but
  dev->state is checked after acquir…
severity: none
vendor: Linux
product: Linux
affected:
  - >-
    Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <
    8be30959be31b4205e3bdd2e2a6221f3a2ee7ea1
  - >-
    Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <
    e8219accce2f6d3502ed71f5b5e854ecf27249a6
  - >-
    Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <
    87cbf9410b12f5c2d659bb01e8ecf6517cb9f28c
  - >-
    Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <
    162178ca83c3de986900385a0477eb539f8e1a7e
  - >-
    Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <
    ebd916fdfefaacbc0e577f7037ec96b31a105e5f
  - >-
    Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <
    c29a83c1ff3f06d5751f6d365b606c9f81ccc4cb
  - >-
    Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <
    64ec019bf9a8b12f53b9f2777d65aadb730b5a84
  - >-
    Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <
    dd0eed9e165b1a6292f49e622e3dd0b7d99b106d
  - Linux < 5.10.270
  - Linux < 5.15.221
  - Linux < 6.1.188
  - Linux < 6.6.157
  - Linux < 6.12.110
  - Linux < 6.18.51
  - Linux < 7.2.5
  - Linux (all versions)
published: '2026-09-16'
updated: '2026-09-17'
sourceUpdated: '2026-09-17T10:17:05.793'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-90020'
references:
  - url: 'https://git.kernel.org/stable/c/162178ca83c3de986900385a0477eb539f8e1a7e'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/64ec019bf9a8b12f53b9f2777d65aadb730b5a84'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/87cbf9410b12f5c2d659bb01e8ecf6517cb9f28c'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/8be30959be31b4205e3bdd2e2a6221f3a2ee7ea1'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/c29a83c1ff3f06d5751f6d365b606c9f81ccc4cb'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/dd0eed9e165b1a6292f49e622e3dd0b7d99b106d'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/e8219accce2f6d3502ed71f5b5e854ecf27249a6'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/ebd916fdfefaacbc0e577f7037ec96b31a105e5f'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
tags:
  - nvd
  - cve.org
ingestedAt: '2026-09-16T10:53:53.937Z'
epss: 0.0021
epssPercentile: 0.10011
---

## Overview

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

USB: gadget: fix NULL pointer dereference in gadget_dev_ioctl()

gadget_dev_ioctl() reads dev->gadget before acquiring dev->lock, but
dev->state is checked after acquiring the lock. Therefore a concurrent
bind can change the device state between these operations, which can
leave ioctl with a stale NULL gadget pointer and causing a NULL pointer
dereference at gadget->ops->ioctl.

Read dev->gadget while holding dev->lock so that the gadget pointer
and device state are sampled consistently.

## Remediation

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