ghsa-3299-q63p-824w
Vulnerability from github
Published
2025-04-16 15:34
Modified
2025-04-16 15:34
Details

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.

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{
  "affected": [],
  "aliases": [
    "CVE-2025-23131"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2025-04-16T15:16:07Z",
    "severity": null
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\ndlm: prevent NPD when writing a positive value to event_done\n\ndo_uevent returns the value written to event_done. In case it is a\npositive value, new_lockspace would undo all the work, and lockspace\nwould not be set. __dlm_new_lockspace, however, would treat that\npositive value as a success due to commit 8511a2728ab8 (\"dlm: fix use\ncount with multiple joins\").\n\nDown the line, device_create_lockspace would pass that NULL lockspace to\ndlm_find_lockspace_local, leading to a NULL pointer dereference.\n\nTreating such positive values as successes prevents the problem. Given\nthis has been broken for so long, this is unlikely to break userspace\nexpectations.",
  "id": "GHSA-3299-q63p-824w",
  "modified": "2025-04-16T15:34:46Z",
  "published": "2025-04-16T15:34:46Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-23131"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/8e2bad543eca5c25cd02cbc63d72557934d45f13"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/b73c4ad4d387fe5bc988145bd9f1bc0de76afd5c"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}


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