CVE-2026-23452

Kernel crash via runtime-PM parent use-after-free

Published Apr 3, 2026 · Updated Apr 3, 2026

Use-after-free in affected Linux Kernel branches allows local users to crash the kernel by racing SCSI device removal. pm_runtime_work() saves dev->parent, releases the child power lock, and then locks and idles that parent after concurrent removal can free it. Low-privileged local access and successful race timing are required; the demonstrated result is a KASAN-detected invalid read that interrupts the system.

CVSS severity4.7
Medium
EPSS probability0.09%
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 affected Linux Kernel branches allows local users to crash the kernel by racing SCSI device removal. pm_runtime_work() saves dev->parent, releases the child power lock, and then locks and idles that parent after concurrent removal can free it. Low-privileged local access and successful race timing are required; the demonstrated result is a KASAN-detected invalid read that interrupts the system.

The record

CVE
CVE-2026-23452
Published
Apr 3, 2026
Updated
Apr 3, 2026
Vendor
The Linux Kernel Organization
Product
Linux Kernel
Classifications
CWE-362, T1499
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Apr 3, 2026CVE publishedPublication date reported by the CVE source.
  2. Apr 3, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

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

  1. Affected versionversion=2.6.32
  2. Affected versionversion=5e928f77a09a07f9dd595bb8a489965d69a83458 <29ab768277617452d88c0607c9299cdc63b6e9ff
  3. Affected versionversion=5e928f77a09a07f9dd595bb8a489965d69a83458 <39f2d86f2ddde8d1beda05732f30c7cd945e0b5a
  4. Affected versionversion=5e928f77a09a07f9dd595bb8a489965d69a83458 <5649b46af8b167259e8a8e4e7eb3667ce74554b5
  5. Affected versionversion=5e928f77a09a07f9dd595bb8a489965d69a83458 <bb081fd37f8312651140d7429557258afe51693d
  6. Affected versionversion=5e928f77a09a07f9dd595bb8a489965d69a83458 <c6febaacfb8a0aec7d771a0e6c21cd68102d5679
  7. Affected versionversion=5e928f77a09a07f9dd595bb8a489965d69a83458 <cf65a77c0f9531eb6cfb97cc040974d2d8fff043

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linux Kernelversion=2.6.32; version=5e928f77a09a07f9dd595bb8a489965d69a83458 <29ab768277617452d88c0607c9299cdc63b6e9ff; version=5e928f77a09a07f9dd595bb8a489965d69a83458 <39f2d86f2ddde8d1beda05732f30c7cd945e0b5a; version=5e928f77a09a07f9dd595bb8a489965d69a83458 <5649b46af8b167259e8a8e4e7eb3667ce74554b5; version=5e928f77a09a07f9dd595bb8a489965d69a83458 <bb081fd37f8312651140d7429557258afe51693d; version=5e928f77a09a07f9dd595bb8a489965d69a83458 <c6febaacfb8a0aec7d771a0e6c21cd68102d5679; version=5e928f77a09a07f9dd595bb8a489965d69a83458 <cf65a77c0f9531eb6cfb97cc040974d2d8fff043

Published CVSS scores

4.7NIST NVDCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

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')
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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