{
  "schema_version": "1.6.1",
  "id": "RPI-CVE-2025-21994",
  "modified": "2026-10-07T17:22:01Z",
  "upstream": [
    "CVE-2025-21994"
  ],
  "published": "2025-04-02T13:59:32Z",
  "summary": "ksmbd: fix incorrect validation for num_aces field of smb_acl",
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nksmbd: fix incorrect validation for num_aces field of smb_acl\n\nparse_dcal() validate num_aces to allocate posix_ace_state_array.\n\nif (num_aces > ULONG_MAX / sizeof(struct smb_ace *))\n\nIt is an incorrect validation that we can create an array of size ULONG_MAX.\nsmb_acl has ->size field to calculate actual number of aces in request buffer\nsize. Use this to check invalid num_aces.",
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  "references": [
    {
      "type": "ADVISORY",
      "url": "https://www.cve.org/CVERecord?id=CVE-2025-21994"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/c3a3484d9d31b27a3db0fab91fcf191132d65236"
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      "url": "https://git.kernel.org/stable/c/1b8b67f3c5e5169535e26efedd3e422172e2db64"
    }
  ],
  "database_specific": {
    "source": "https://git.kernel.org/pub/scm/linux/security/vulns.git",
    "upstream_modified": "2026-08-05T12:19:11Z"
  }
}