ghsa-93m4-3786-5phj
Vulnerability from github
Published
2025-07-10 09:32
Modified
2025-09-09 18:31
Details

In the Linux kernel, the following vulnerability has been resolved:

fs/fhandle.c: fix a race in call of has_locked_children()

may_decode_fh() is calling has_locked_children() while holding no locks. That's an oopsable race...

The rest of the callers are safe since they are holding namespace_sem and are guaranteed a positive refcount on the mount in question.

Rename the current has_locked_children() to __has_locked_children(), make it static and switch the fs/namespace.c users to it.

Make has_locked_children() a wrapper for __has_locked_children(), calling the latter under read_seqlock_excl(&mount_lock).

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{
  "affected": [],
  "aliases": [
    "CVE-2025-38306"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2025-07-10T08:15:29Z",
    "severity": null
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nfs/fhandle.c: fix a race in call of has_locked_children()\n\nmay_decode_fh() is calling has_locked_children() while holding no locks.\nThat\u0027s an oopsable race...\n\nThe rest of the callers are safe since they are holding namespace_sem and\nare guaranteed a positive refcount on the mount in question.\n\nRename the current has_locked_children() to __has_locked_children(), make\nit static and switch the fs/namespace.c users to it.\n\nMake has_locked_children() a wrapper for __has_locked_children(), calling\nthe latter under read_seqlock_excl(\u0026mount_lock).",
  "id": "GHSA-93m4-3786-5phj",
  "modified": "2025-09-09T18:31:11Z",
  "published": "2025-07-10T09:32:30Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-38306"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/1f282cdc1d219c4a557f7009e81bc792820d9d9a"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/287c7d34eedd37af1272dfb3b6e8656f4f026424"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/6482c3dccbfb8d20e2856ce67c75856859930b3f"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}


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