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Vulnerabilities

Vulnerability · CVE-2025-23131

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, 2025 · catalog updated Oct 15, 2026 · Linux Linux

Check this week

CVE-2025-23131 is not in CISA KEV. FIRST estimates a 19.00% chance of exploitation in the next 30 days. Check whether you run Linux Linux.

Gaps on this record

  • No vendor fix or required action is stored. Compare the linked advisory before you change production.
Severity
Medium5.5
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
19.00%
Remediation
Version ranges on file
Affected products
cpe linux/linux kernel · vendor Linux Linux 8511a2728ab82cab398e39d019f5cf1246021c1c <b73c4ad4d387fe5bc988145bd9f1bc0de76afd5c

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.

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

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  • cpe linux/linux kernelversion unspecified
  • vendor Linux Linux 8511a2728ab82cab398e39d019f5cf1246021c1c <b73c4ad4d387fe5bc988145bd9f1bc0de76afd5c8511a2728ab82cab398e39d019f5cf1246021c1c <b73c4ad4d387fe5bc988145bd9f1bc0de76afd5c

How to fix CVE-2025-23131

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

CVE-2025-23131 is not in CISA KEV. FIRST estimates a 19.00% chance of exploitation in the next 30 days. Check whether you run Linux Linux.

Which versions are affected?

Compare what you have installed with Linux Linux 8511a2728ab82cab398e39d019f5cf1246021c1c <b73c4ad4d387fe5bc988145bd9f1bc0de76afd5c 8511a2728ab82cab398e39d019f5cf1246021c1c <b73c4ad4d387fe5bc988145bd9f1bc0de76afd5c. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

CWE-476: NULL Pointer Dereference. EPSS 19.00%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Technology hubs

Ubuntu security

Code

The project this record applies to. Exploit listings stay in References.

Timeline

Detection, updates, and resolution for this record.

  1. Apr 16, 2025 · NIST NVD

    Detected

    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

  2. Oct 15, 2026 · NIST NVD

    Updated

    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

Sources

  • CVE.orgVulnerability recordCVE-2025-23131

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2025-23131

    30-day exploitation probability 19.0%

    first.org
  • EUVDVulnerability recordEUVD-2025-11172

    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 se

    euvd.enisa.europa.eu
  • NIST NVDVulnerability recordCVE-2025-23131

    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

    nvd.nist.gov
  • Ubuntu Security NoticesVendor advisoryCVE-2025-23131

    It was discovered that the i.MX clock driver in the Linux kernel did not properly handle certain memory allocation failure conditions, leading to a null pointer dereference vulnerability. A local attacker could possibly use this to cause a denial of service (system crash). (CVE-2

    ubuntu.com

References

Freshness

Last verified in this catalog Oct 17, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.