GHSA-6QHG-X625-34C5

Vulnerability from github – Published: 2026-08-22 18:30 – Updated: 2026-08-22 18:30
VLAI
Details

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

usb: gadget: f_ncm: Use unsigned int for ndp_index

The variable ndp_index is declared as a signed integer, but it stores the return value of get_ncm(), which is unsigned.

A malicious host can supply a large offset that overflows the signed ndp_index, making it negative. Because ndp_index is compared against unsigned bounds, this negative value bypasses sanity checks and leads to an out-of-bounds read when calculating the address of the NDP block (ntb_ptr + ndp_index).

Fix this by changing ndp_index to unsigned int to ensure consistent unsigned comparisons throughout the function.

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{
  "affected": [],
  "aliases": [
    "CVE-2026-74679"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-08-22T16:16:42Z",
    "severity": null
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nusb: gadget: f_ncm: Use unsigned int for ndp_index\n\nThe variable ndp_index is declared as a signed integer, but it stores\nthe return value of get_ncm(), which is unsigned.\n\nA malicious host can supply a large offset that overflows the signed\nndp_index, making it negative. Because ndp_index is compared against\nunsigned bounds, this negative value bypasses sanity checks and leads\nto an out-of-bounds read when calculating the address of the NDP\nblock (ntb_ptr + ndp_index).\n\nFix this by changing ndp_index to unsigned int to ensure consistent\nunsigned comparisons throughout the function.",
  "id": "GHSA-6qhg-x625-34c5",
  "modified": "2026-08-22T18:30:29Z",
  "published": "2026-08-22T18:30:29Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-74679"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/11413d7ed42174b8f5d8d0b6a25d10dc88239b21"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/5b2b3a3229a3f4c493ffdee53aee2f173b6f13b3"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/6b1c8a9403a26cb0fed7a648916c74dc236da591"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/9c8c6825a750fcd3efbe922847ca70ccd5a66857"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/a1c0deeba4a46481543d6b09c665f758c54c3a1a"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/d13f650a3485b58c124b3cda45597e8002c9c833"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/d328fdc607fa1bb668ad512e1c918a120f78f337"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/fc9e54e22845c4da29588ca0986cb7c795b5a262"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}



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