CVE-2026-74313

System crash via VDUSE open-destroy race

Published Aug 15, 2026 · Updated Aug 15, 2026

Use-after-free in the Linux kernel VDUSE component allows local users to crash the system by racing device open and destruction. vduse_dev_open() drops vduse_lock after its IDR lookup and before taking dev->lock, so VDUSE_DESTROY_DEV can remove and free the same object. Reaching the flaw requires local low-privilege access and winning the concurrency window; the grounded consequence is a system crash.

CVSS severity8.8
High
EPSS probability0.13%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Use-after-free in the Linux kernel VDUSE component allows local users to crash the system by racing device open and destruction. vduse_dev_open() drops vduse_lock after its IDR lookup and before taking dev->lock, so VDUSE_DESTROY_DEV can remove and free the same object. Reaching the flaw requires local low-privilege access and winning the concurrency window; the grounded consequence is a system crash.

The record

CVE
CVE-2026-74313
Published
Aug 15, 2026
Updated
Aug 15, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-362, CWE-416, T1499
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Aug 15, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 15, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=5.15
  2. Affected versionversion=c8a6153b6c59d95c0e091f053f6f180952ade91e <35483c5306e09b3190ff937089d404a78012695c
  3. Affected versionversion=c8a6153b6c59d95c0e091f053f6f180952ade91e <5c1560be8aa6849356455af67518d35c551cbd95
  4. Affected versionversion=c8a6153b6c59d95c0e091f053f6f180952ade91e <79e12c891940b0c4c75881b7fd82a8cbb8ac97be
  5. Affected versionversion=c8a6153b6c59d95c0e091f053f6f180952ade91e <93ed4692f2299a40346025979f40e4a9b7b33af7
  6. Affected versionversion=c8a6153b6c59d95c0e091f053f6f180952ade91e <a2d0a57538fd0b3b3ab75d64bb64f4cd2fab13a2
  7. Affected versionversion=c8a6153b6c59d95c0e091f053f6f180952ade91e <d94e2947203aead590fd63f667d316d4475d65af
  8. Affected versionversion=c8a6153b6c59d95c0e091f053f6f180952ade91e <e440e077748939839d9f76e24383b76b785f80ce

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=5.15; version=c8a6153b6c59d95c0e091f053f6f180952ade91e <35483c5306e09b3190ff937089d404a78012695c; version=c8a6153b6c59d95c0e091f053f6f180952ade91e <5c1560be8aa6849356455af67518d35c551cbd95; version=c8a6153b6c59d95c0e091f053f6f180952ade91e <79e12c891940b0c4c75881b7fd82a8cbb8ac97be; version=c8a6153b6c59d95c0e091f053f6f180952ade91e <93ed4692f2299a40346025979f40e4a9b7b33af7; version=c8a6153b6c59d95c0e091f053f6f180952ade91e <a2d0a57538fd0b3b3ab75d64bb64f4cd2fab13a2; version=c8a6153b6c59d95c0e091f053f6f180952ade91e <d94e2947203aead590fd63f667d316d4475d65af; version=c8a6153b6c59d95c0e091f053f6f180952ade91e <e440e077748939839d9f76e24383b76b785f80ce

Published CVSS scores

5.5Red HatCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
8.8Linux kernel CNA via cve.orgCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-362Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')
CWE-416Use After Free
T1499Endpoint Denial of Service

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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