CVE-2025-39674

Kernel crash via cleanup of unallocated MSI resources

Published Sep 5, 2025 · Updated Sep 5, 2025

Null pointer dereference in Linux 6.16 through 6.16.3 allows local users to crash the kernel during Qualcomm UFS initialization. In ufs_qcom_config_esi(), failed Platform MSI allocation leaves no MSI resources, but automatic cleanup still calls the resource-release path and dereferences NULL. Reachability requires a Qualcomm UFS controller with MCQ enabled and a Platform MSI allocation failure; the resulting kernel crash interrupts service.

CVSS severity5.5
Medium
EPSS probability0.14%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Null pointer dereference in Linux 6.16 through 6.16.3 allows local users to crash the kernel during Qualcomm UFS initialization. In ufs_qcom_config_esi(), failed Platform MSI allocation leaves no MSI resources, but automatic cleanup still calls the resource-release path and dereferences NULL. Reachability requires a Qualcomm UFS controller with MCQ enabled and a Platform MSI allocation failure; the resulting kernel crash interrupts service.

The record

CVE
CVE-2025-39674
Published
Sep 5, 2025
Updated
Sep 5, 2025
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-476, T1499.004
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Sep 5, 2025CVE publishedPublication date reported by the CVE source.
  2. Sep 5, 2025Record 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=6.16
  2. Affected versionversion=e46a28cea29a0ca7d51c811acccf5d119b40c745 <6300d5c5438724c0876828da2f6e2c1a661871fc
  3. Affected versionversion=e46a28cea29a0ca7d51c811acccf5d119b40c745 <aaf17a35a59572c8b29372883619c3dbb0ebb50a

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=6.16; version=e46a28cea29a0ca7d51c811acccf5d119b40c745 <6300d5c5438724c0876828da2f6e2c1a661871fc; version=e46a28cea29a0ca7d51c811acccf5d119b40c745 <aaf17a35a59572c8b29372883619c3dbb0ebb50a

Published CVSS scores

5.5NIST National Vulnerability DatabaseCVSS:3.1/AV:L/AC:L/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-476NULL Pointer Dereference
T1499.004Endpoint Denial of Service: Application or System Exploitation

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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