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CVE-2025-23131

5.5 · MEDIUM

In the Linux kernel, the following vulnerability has been resolved: dlm: prevent NPD when writing a positive value to event_done do_uevent returns the value written to event_done.

Published Apr 16, 2025CWE-476EPSS 0.19%

Overview

CVE-2025-23131 is a medium-severity vulnerability. It was published on April 16, 2025 and has a CVSS 3.1 base score of 5.5 (MEDIUM).

This vulnerability has a CVSS 3.1 base score of 5.5, rated MEDIUM. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

Technical description

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

dlm: prevent NPD when writing a positive value to event_done

do_uevent returns the value written to event_done. In case it is a

positive value, new_lockspace would undo all the work, and lockspace

would not be set. __dlm_new_lockspace, however, would treat that

positive value as a success due to commit 8511a2728ab8 ("dlm: fix use

count with multiple joins").

Down the line, device_create_lockspace would pass that NULL lockspace to

dlm_find_lockspace_local, leading to a NULL pointer dereference.

Treating such positive values as successes prevents the problem. Given

this has been broken for so long, this is unlikely to break userspace

expectations.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

Refgit.kernel.org/stable/c/10b7a59814765d18d43555c9cef4eb3048b7e8a3Refgit.kernel.org/stable/c/7109d69bec6edce546dc870e66bd2b668a3d5549Refgit.kernel.org/stable/c/8e2bad543eca5c25cd02cbc63d72557934d45f13Refgit.kernel.org/stable/c/a1c41aebb184d9228a440dcb6761224e65b0e49aRefgit.kernel.org/stable/c/b73c4ad4d387fe5bc988145bd9f1bc0de76afd5cRefgit.kernel.org/stable/c/c7837e2c96559663c33f43da403d9cf3cf77cfa7Refgit.kernel.org/stable/c/ee28d99d789b077565cbe0377374d1e826c64d93

How CyberStrike helps

Frequently asked questions

What is CVE-2025-23131?

CVE-2025-23131 is a medium-severity vulnerability. It was published on April 16, 2025 and has a CVSS 3.1 base score of 5.5 (MEDIUM).

How severe is CVE-2025-23131?

This vulnerability has a CVSS 3.1 base score of 5.5, rated MEDIUM. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

How do I fix or remediate CVE-2025-23131?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2025-23131?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2025-23131 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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