What is CVE-2025-23131?

CVE-2025-23131 is a Medium severity Linux kernel vulnerability with a CVSS score of 5.5 out of 10, classified as a NULL Pointer Dereference flaw (CWE-476), affecting Linux kernel versions from 2.6.31 onward and patched in 5.10.260, 5.15.211, 6.1.177 and others. CVE-2025-23131 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2025-23131?

CVE-2025-23131 has a CVSS score of 5.5 out of 10, rated Medium severity. The vector string is CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.

Is there a patch available for CVE-2025-23131?

Yes, CVE-2025-23131 has been patched. Fixed versions include 5.10.260, 5.15.211, 6.1.177 and others. If you are running Linux kernel 2.6.31 or later up to the fix versions, apply the relevant patch for your kernel branch.

Is CVE-2025-23131 actively exploited?

CVE-2025-23131 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is NULL Pointer Dereference (CWE-476)?

The product dereferences a pointer that it expects to be valid but is NULL, typically causing a crash. See MITRE CWE for full details: https://cwe.mitre.org/data/definitions/476.html

CVE-2025-23131

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. 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.

Package Linux Kernel

Published 2025-04-16

Last modified 2026-07-04

CVSS version 3.1

Patch available

Yes

CVSS 3.1 score

5.5

out of 10

Medium

Attack Vector

Local

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

Low

Integrity

None

Availability

High

Vector string

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Weakness type

CWE-476

CVE-2025-23131 is a NULL Pointer Dereference vulnerability

What is NULL Pointer Dereference?

The product dereferences a pointer that it expects to be valid but is NULL, typically causing a crash. Learn more on MITRE CWE

Affected versions

Linux kernel versions 2.6.31 and later are affected. Fixed in 5.10.260, 5.15.211, 6.1.177, 6.6.144, 6.12.95, 6.14.2, 6.15 and their respective stable series.

Affected from

≥ 2.6.31

Fixed in

✓ 5.10.260 5.10.x ✓ 5.15.211 5.15.x ✓ 6.1.177 6.1.x ✓ 6.6.144 6.6.x ✓ 6.12.95 6.12.x ✓ 6.14.2 6.14.x ✓ 6.15

References

7 total

Kernel Git
https://git.kernel.org/stable/c/8e2bad543eca5c25cd02cbc63d72557934d45f13

Patch
Kernel Git
https://git.kernel.org/stable/c/b73c4ad4d387fe5bc988145bd9f1bc0de76afd5c

Patch
Kernel Git
https://git.kernel.org/stable/c/10b7a59814765d18d43555c9cef4eb3048b7e8a3
Kernel Git
https://git.kernel.org/stable/c/7109d69bec6edce546dc870e66bd2b668a3d5549
Kernel Git
https://git.kernel.org/stable/c/a1c41aebb184d9228a440dcb6761224e65b0e49a

Showing 5 of 7 references View all on NVD

Details

CVE ID CVE-2025-23131

Severity Medium

CVSS score 5.5 / 10

CVSS version 3.1

Published 2025-04-16

Modified 2026-07-04

KEV No

Patch

Yes

Package linux

Frequently asked questions

What is CVE-2025-23131?

CVE-2025-23131 is a Medium severity Linux kernel vulnerability with a CVSS score of 5.5 out of 10 , classified as a NULL Pointer Dereference flaw (CWE-476) . It affects Linux kernel versions from 2.6.31 onward and has been patched in 5.10.260, 5.15.211, 6.1.177 and others. CVE-2025-23131 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2025-23131?

CVE-2025-23131 has a CVSS score of 5.5 out of 10, rated Medium severity (CVSS 3.1). The vector string is CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.
Is there a patch available for CVE-2025-23131?

Yes. CVE-2025-23131 has been patched. Fixed versions include 5.10.260, 5.15.211, 6.1.177 and others. If you are running Linux kernel 2.6.31 or later up to the fix versions, apply the relevant patch for your kernel branch.
Is CVE-2025-23131 actively exploited?

No. CVE-2025-23131 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.