ghsa-pxm9-5xjv-gw34
Vulnerability from github
Published
2025-10-29 15:31
Modified
2025-11-03 03:30
Details

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

ksmbd: transport_ipc: validate payload size before reading handle

handle_response() dereferences the payload as a 4-byte handle without verifying that the declared payload size is at least 4 bytes. A malformed or truncated message from ksmbd.mountd can lead to a 4-byte read past the declared payload size. Validate the size before dereferencing.

This is a minimal fix to guard the initial handle read.

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{
  "affected": [],
  "aliases": [
    "CVE-2025-40084"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2025-10-29T14:15:55Z",
    "severity": null
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nksmbd: transport_ipc: validate payload size before reading handle\n\nhandle_response() dereferences the payload as a 4-byte handle without\nverifying that the declared payload size is at least 4 bytes. A malformed\nor truncated message from ksmbd.mountd can lead to a 4-byte read past the\ndeclared payload size. Validate the size before dereferencing.\n\nThis is a minimal fix to guard the initial handle read.",
  "id": "GHSA-pxm9-5xjv-gw34",
  "modified": "2025-11-03T03:30:25Z",
  "published": "2025-10-29T15:31:56Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-40084"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/2dc125f5da134c0915a840b62565c60a595673dd"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/6f40e50ceb99fc8ef37e5c56e2ec1d162733fef0"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/867ffd9d67285612da3f0498ca618297f8e41f01"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/898d527ed94c19980a4d848f10057f1fed578ffb"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/a02e432d5130da4c723aabe1205bac805889fdb2"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}


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