ghsa-xm3p-r4jv-jxcf
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:

ksmbd: fix overflow in dacloffset bounds check

The dacloffset field was originally typed as int and used in an unchecked addition, which could overflow and bypass the existing bounds check in both smb_check_perm_dacl() and smb_inherit_dacl().

This could result in out-of-bounds memory access and a kernel crash when dereferencing the DACL pointer.

This patch converts dacloffset to unsigned int and uses check_add_overflow() to validate access to the DACL.

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{
  "affected": [],
  "aliases": [
    "CVE-2025-22039"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2025-04-16T15:15:56Z",
    "severity": null
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nksmbd: fix overflow in dacloffset bounds check\n\nThe dacloffset field was originally typed as int and used in an\nunchecked addition, which could overflow and bypass the existing\nbounds check in both smb_check_perm_dacl() and smb_inherit_dacl().\n\nThis could result in out-of-bounds memory access and a kernel crash\nwhen dereferencing the DACL pointer.\n\nThis patch converts dacloffset to unsigned int and uses\ncheck_add_overflow() to validate access to the DACL.",
  "id": "GHSA-xm3p-r4jv-jxcf",
  "modified": "2025-04-16T15:34:40Z",
  "published": "2025-04-16T15:34:40Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-22039"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/443b373a4df5a2cb9f7b8c4658b2afedeb16397f"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/6a9cd9ff0fa2bcc30b2bfb8bdb161eb20e44b9dc"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/6b8d379048b168a0dff5ab1acb975b933f368514"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/beff0bc9d69bc8e733f9bca28e2d3df5b3e10e42"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}


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