---
cve: "CVE-2025-23131"
severity: "LOW"
cvss: 3.1
epss: "18%"
vendor: "Linux"
kev: false
exploited: false
published: "2025-04-16 15:16:07"
tags: [cve, security, low]
source: tsecurity.de CVE-Dossier
exported: "2026-09-12T00:46:25+02:00"
---

# CVE-2025-23131

> 3.1 LOW

## Beschreibung

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.

## Patch verfügbar (OSV)

- Kernel ≥ 5.10.260
- Kernel ≥ 5.15.211
- Kernel ≥ 6.1.177
- Kernel ≥ 6.6.144
- Kernel ≥ 6.12.95
- Kernel ≥ 6.14.2

## Referenzen

- <https://git.kernel.org/stable/c/a1c41aebb184d9228a440dcb6761224e65b0e49a>
- <https://git.kernel.org/stable/c/ee28d99d789b077565cbe0377374d1e826c64d93>
- <https://git.kernel.org/stable/c/c7837e2c96559663c33f43da403d9cf3cf77cfa7>
- <https://git.kernel.org/stable/c/7109d69bec6edce546dc870e66bd2b668a3d5549>
- <https://git.kernel.org/stable/c/10b7a59814765d18d43555c9cef4eb3048b7e8a3>
- <https://git.kernel.org/stable/c/b73c4ad4d387fe5bc988145bd9f1bc0de76afd5c>
- <https://git.kernel.org/stable/c/8e2bad543eca5c25cd02cbc63d72557934d45f13>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2025-23131) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_