---
id: CVE-2026-90045
title: |-
  In the Linux kernel, the following vulnerability has been resolved:

  USB: gadget: ffs: fix mm lifetime handling

  io_data stores a pointer to the submitting task's mm_struct,
  but does not currently hold a reference to it while async
  reque…
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  USB: gadget: ffs: fix mm lifetime handling

  io_data stores a pointer to the submitting task's mm_struct,
  but does not currently hold a reference to it while async
  reque…
severity: high
cvss: 7.8
cvssVector: 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H'
vendor: Linux
product: Linux
affected:
  - >-
    Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <
    f3d31484b3f26d63c09e5569ebfaa1079a17f171
  - >-
    Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <
    7411de0ce3b45286de1de82526795658ea6eacb0
  - >-
    Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <
    5eb5c72c72fef76cb765ef1669b62b6a3ba1bfc8
  - Linux < 6.18.51
  - Linux < 7.2.5
  - Linux (all versions)
published: '2026-09-16'
updated: '2026-09-21'
sourceUpdated: '2026-09-21T14:17:28.670'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-90045'
references:
  - url: 'https://git.kernel.org/stable/c/1625827648f4e1595ea6ba5521bc87ee5088b32b'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/5eb5c72c72fef76cb765ef1669b62b6a3ba1bfc8'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/7411de0ce3b45286de1de82526795658ea6eacb0'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/f3d31484b3f26d63c09e5569ebfaa1079a17f171'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
tags:
  - nvd
  - cve.org
epss: 0.00148
epssPercentile: 0.04391
ingestedAt: '2026-09-16T10:53:53.931Z'
---

## Overview

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

USB: gadget: ffs: fix mm lifetime handling

io_data stores a pointer to the submitting task's mm_struct,
but does not currently hold a reference to it while async
requests are pending.

This can result in a use-after-free if the task exits before
completion handling finishes.

Take a reference with mmgrab() when queuing the read request
and release it with mmdrop() on request completion.

## Remediation

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