---
id: CVE-2026-90019
title: |-
  In the Linux kernel, the following vulnerability has been resolved:

  usb: gadget: fix null pointer dereference in usb_put_function_instance()

  usb_put_function_instance() attempts to dereference fd inside fi struct
  to get mod in uvc_allo…
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  usb: gadget: fix null pointer dereference in usb_put_function_instance()

  usb_put_function_instance() attempts to dereference fd inside fi struct
  to get mod in uvc_allo…
severity: none
vendor: Linux
product: Linux
affected:
  - >-
    Linux >= 0062f6e56f70bd2230ba1ebd1667d1b32a1af3b2 <
    0fc54a00954f9f4c3e3d4ffa64a530685d99a39b
  - >-
    Linux >= 0062f6e56f70bd2230ba1ebd1667d1b32a1af3b2 <
    6e6736c049683380f5e20becde498986e9293ca4
  - >-
    Linux >= 0062f6e56f70bd2230ba1ebd1667d1b32a1af3b2 <
    3a9691fff79bcce95338435599df6d3ae433cfdc
  - >-
    Linux >= 0062f6e56f70bd2230ba1ebd1667d1b32a1af3b2 <
    7a4f4ca7ff32ae24807c83e2a06d62b13378d53c
  - >-
    Linux >= 0062f6e56f70bd2230ba1ebd1667d1b32a1af3b2 <
    6ea3a073ca97716d4a73df49a3bec1c3ccf8e2a0
  - >-
    Linux >= 0062f6e56f70bd2230ba1ebd1667d1b32a1af3b2 <
    d3a7fa61997db3bf6dadef4c1bd87a4fa782a817
  - >-
    Linux >= 0062f6e56f70bd2230ba1ebd1667d1b32a1af3b2 <
    5117f236e9e30744338b425395d55913c4500897
  - >-
    Linux >= 0062f6e56f70bd2230ba1ebd1667d1b32a1af3b2 <
    6e74ac5c596fd246e37eadfc354567179ccbe9aa
  - Linux 3.9
published: '2026-09-16'
updated: '2026-09-16'
sourceUpdated: '2026-09-16T11:17:14.780'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-90019'
references:
  - url: 'https://git.kernel.org/stable/c/0fc54a00954f9f4c3e3d4ffa64a530685d99a39b'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/3a9691fff79bcce95338435599df6d3ae433cfdc'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/5117f236e9e30744338b425395d55913c4500897'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/6e6736c049683380f5e20becde498986e9293ca4'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/6e74ac5c596fd246e37eadfc354567179ccbe9aa'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/6ea3a073ca97716d4a73df49a3bec1c3ccf8e2a0'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/7a4f4ca7ff32ae24807c83e2a06d62b13378d53c'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/d3a7fa61997db3bf6dadef4c1bd87a4fa782a817'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
tags:
  - nvd
  - cve.org
ingestedAt: '2026-09-16T10:53:53.938Z'
epss: 0.0021
epssPercentile: 0.10009
---

## Overview

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

usb: gadget: fix null pointer dereference in usb_put_function_instance()

usb_put_function_instance() attempts to dereference fd inside fi struct
to get mod in uvc_alloc_inst() error path. However, fd is not allocated
until later in try_get_usb_function_instance() after allocating fi in
uvc_alloc_inst() and thus guranteed to be null in error path. Fix this
by adding a null check for fi->fd that returns if fd is null.

## Remediation

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