dlm: prevent NPD when writing a positive value to event_done
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.
CVE-2025-23131
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: cve:CVE-2025-23131
Linux
Source reference: /containers/cna/affected/0/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Linux
Source reference: /containers/cna/affected/1/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "8511a2728ab82cab398e39d019f5cf1246021c1c",
"lessThan": "a1c41aebb184d9228a440dcb6761224e65b0e49a",
"versionType": "git"
},
{
"status": "affected",
"version": "8511a2728ab82cab398e39d019f5cf1246021c1c",
"lessThan": "ee28d99d789b077565cbe0377374d1e826c64d93",
"versionType": "git"
},
{
"status": "affected",
"version": "8511a2728ab82cab398e39d019f5cf1246021c1c",
"lessThan": "c7837e2c96559663c33f43da403d9cf3cf77cfa7",
"versionType": "git"
},
{
"status": "affected",
"version": "8511a2728ab82cab398e39d019f5cf1246021c1c",
"lessThan": "7109d69bec6edce546dc870e66bd2b668a3d5549",
"versionType": "git"
},
{
"status": "affected",
"version": "8511a2728ab82cab398e39d019f5cf1246021c1c",
"lessThan": "10b7a59814765d18d43555c9cef4eb3048b7e8a3",
"versionType": "git"
},
{
"status": "affected",
"version": "8511a2728ab82cab398e39d019f5cf1246021c1c",
"lessThan": "b73c4ad4d387fe5bc988145bd9f1bc0de76afd5c",
"versionType": "git"
},
{
"status": "affected",
"version": "8511a2728ab82cab398e39d019f5cf1246021c1c",
"lessThan": "8e2bad543eca5c25cd02cbc63d72557934d45f13",
"versionType": "git"
}
],
"programFiles": [
"fs/dlm/lockspace.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "2.6.31"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "2.6.31",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "5.10.260",
"versionType": "semver",
"lessThanOrEqual": "5.10.*"
},
{
"status": "unaffected",
"version": "5.15.211",
"versionType": "semver",
"lessThanOrEqual": "5.15.*"
},
{
"status": "unaffected",
"version": "6.1.177",
"versionType": "semver",
"lessThanOrEqual": "6.1.*"
},
{
"status": "unaffected",
"version": "6.6.144",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.12.95",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.14.2",
"versionType": "semver",
"lessThanOrEqual": "6.14.*"
},
{
"status": "unaffected",
"version": "6.15",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"fs/dlm/lockspace.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2025-23131
Source reference:
/cveMetadata/cveId
Publisher severity
No explicit severity was provided.
- Event
- #26984 · Revision 1
- Added to Heist Feed
- Publisher date