---
id: CVE-2026-74313
title: 'vduse: hold vduse_lock across IDR lookup in open path'
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  vduse: hold vduse_lock across IDR lookup in open path

  vduse_dev_open() looks up struct vduse_dev through the IDR and then
  acquires dev->lock only after vduse_lock has …
severity: high
cvss: 8.8
cvssVector: 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H'
cvssSource: cna
vendor: Linux
product: Linux
affected:
  - >-
    Linux >= c8a6153b6c59d95c0e091f053f6f180952ade91e <
    35483c5306e09b3190ff937089d404a78012695c
  - >-
    Linux >= c8a6153b6c59d95c0e091f053f6f180952ade91e <
    5c1560be8aa6849356455af67518d35c551cbd95
  - >-
    Linux >= c8a6153b6c59d95c0e091f053f6f180952ade91e <
    93ed4692f2299a40346025979f40e4a9b7b33af7
  - >-
    Linux >= c8a6153b6c59d95c0e091f053f6f180952ade91e <
    d94e2947203aead590fd63f667d316d4475d65af
  - >-
    Linux >= c8a6153b6c59d95c0e091f053f6f180952ade91e <
    a2d0a57538fd0b3b3ab75d64bb64f4cd2fab13a2
  - >-
    Linux >= c8a6153b6c59d95c0e091f053f6f180952ade91e <
    79e12c891940b0c4c75881b7fd82a8cbb8ac97be
  - >-
    Linux >= c8a6153b6c59d95c0e091f053f6f180952ade91e <
    e440e077748939839d9f76e24383b76b785f80ce
  - Linux 5.15
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: total
  timestamp: '2026-10-16T18:53:05.168424Z'
published: '2026-08-15'
updated: '2026-10-16'
sourceUpdated: '2026-10-16T18:55:32.347Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-74313'
references:
  - url: 'https://git.kernel.org/stable/c/35483c5306e09b3190ff937089d404a78012695c'
  - url: 'https://git.kernel.org/stable/c/5c1560be8aa6849356455af67518d35c551cbd95'
  - url: 'https://git.kernel.org/stable/c/93ed4692f2299a40346025979f40e4a9b7b33af7'
  - url: 'https://git.kernel.org/stable/c/d94e2947203aead590fd63f667d316d4475d65af'
  - url: 'https://git.kernel.org/stable/c/a2d0a57538fd0b3b3ab75d64bb64f4cd2fab13a2'
  - url: 'https://git.kernel.org/stable/c/79e12c891940b0c4c75881b7fd82a8cbb8ac97be'
  - url: 'https://git.kernel.org/stable/c/e440e077748939839d9f76e24383b76b785f80ce'
tags:
  - cve.org
epss: 0.00171
epssPercentile: 0.06039
ingestedAt: '2026-10-16T19:46:24.380Z'
---

## Overview

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

vduse: hold vduse_lock across IDR lookup in open path

vduse_dev_open() looks up struct vduse_dev through the IDR and then
acquires dev->lock only after vduse_lock has been dropped.

This leaves a window where a concurrent VDUSE_DESTROY_DEV can remove the
same object from the IDR and free it before the open path locks the
device, leading to a use-after-free.

Close this race by keeping vduse_lock held until dev->lock has been
acquired in the open path, matching the lock ordering already used by
the destroy path.

## Affected

- `Linux >= c8a6153b6c59d95c0e091f053f6f180952ade91e < 35483c5306e09b3190ff937089d404a78012695c`
- `Linux >= c8a6153b6c59d95c0e091f053f6f180952ade91e < 5c1560be8aa6849356455af67518d35c551cbd95`
- `Linux >= c8a6153b6c59d95c0e091f053f6f180952ade91e < 93ed4692f2299a40346025979f40e4a9b7b33af7`
- `Linux >= c8a6153b6c59d95c0e091f053f6f180952ade91e < d94e2947203aead590fd63f667d316d4475d65af`
- `Linux >= c8a6153b6c59d95c0e091f053f6f180952ade91e < a2d0a57538fd0b3b3ab75d64bb64f4cd2fab13a2`
- `Linux >= c8a6153b6c59d95c0e091f053f6f180952ade91e < 79e12c891940b0c4c75881b7fd82a8cbb8ac97be`
- `Linux >= c8a6153b6c59d95c0e091f053f6f180952ade91e < e440e077748939839d9f76e24383b76b785f80ce`
- `Linux 5.15`

## Remediation

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