ghsa-f255-x52r-mjq5
Vulnerability from github
Published
2025-12-09 18:30
Modified
2025-12-09 18:30
Details

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

smb: client: fix potential UAF in smb2_close_cached_fid()

find_or_create_cached_dir() could grab a new reference after kref_put() had seen the refcount drop to zero but before cfid_list_lock is acquired in smb2_close_cached_fid(), leading to use-after-free.

Switch to kref_put_lock() so cfid_release() is called with cfid_list_lock held, closing that gap.

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{
  "affected": [],
  "aliases": [
    "CVE-2025-40328"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2025-12-09T16:17:42Z",
    "severity": null
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nsmb: client: fix potential UAF in smb2_close_cached_fid()\n\nfind_or_create_cached_dir() could grab a new reference after kref_put()\nhad seen the refcount drop to zero but before cfid_list_lock is acquired\nin smb2_close_cached_fid(), leading to use-after-free.\n\nSwitch to kref_put_lock() so cfid_release() is called with\ncfid_list_lock held, closing that gap.",
  "id": "GHSA-f255-x52r-mjq5",
  "modified": "2025-12-09T18:30:35Z",
  "published": "2025-12-09T18:30:35Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-40328"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/065bd62412271a2d734810dd50336cae88c54427"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/734e99623c5b65bf2c03e35978a0b980ebc3c2f8"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/bdb596ceb4b7c3f28786a33840263728217fbcf5"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/cb52d9c86d70298de0ab7c7953653898cbc0efd6"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}


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