ghsa-7qmx-chg2-w65c
Vulnerability from github
Published
2025-04-01 18:30
Modified
2025-10-30 21:30
Severity ?
7.1 (High) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H
Details

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

ksmbd: fix out-of-bounds in parse_sec_desc()

If osidoffset, gsidoffset and dacloffset could be greater than smb_ntsd struct size. If it is smaller, It could cause slab-out-of-bounds. And when validating sid, It need to check it included subauth array size.

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{
  "affected": [],
  "aliases": [
    "CVE-2025-21946"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-125"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2025-04-01T16:15:25Z",
    "severity": "HIGH"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nksmbd: fix out-of-bounds in parse_sec_desc()\n\nIf osidoffset, gsidoffset and dacloffset could be greater than smb_ntsd\nstruct size. If it is smaller, It could cause slab-out-of-bounds.\nAnd when validating sid, It need to check it included subauth array size.",
  "id": "GHSA-7qmx-chg2-w65c",
  "modified": "2025-10-30T21:30:40Z",
  "published": "2025-04-01T18:30:53Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-21946"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/159d059cbcb0e6d0e7a7b34af3862ba09a6b22d1"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/6a9831180d0b23b5c97e2bd841aefc8f82900172"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/c1569dbbe2d43041be9f3fef7ca08bec3b66ad1b"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/d6e13e19063db24f94b690159d0633aaf72a0f03"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H",
      "type": "CVSS_V3"
    }
  ]
}


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