ghsa-hjmr-93jw-5crw
Vulnerability from github
Published
2025-06-18 12:30
Modified
2025-06-18 12:30
Details

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

HID: mcp2221: prevent a buffer overflow in mcp_smbus_write()

Smatch Warning: drivers/hid/hid-mcp2221.c:388 mcp_smbus_write() error: __memcpy() '&mcp->txbuf[5]' too small (59 vs 255) drivers/hid/hid-mcp2221.c:388 mcp_smbus_write() error: __memcpy() 'buf' too small (34 vs 255)

The 'len' variable can take a value between 0-255 as it can come from data->block[0] and it is user data. So add an bound check to prevent a buffer overflow in memcpy().

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{
  "affected": [],
  "aliases": [
    "CVE-2022-50131"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2025-06-18T11:15:42Z",
    "severity": null
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nHID: mcp2221: prevent a buffer overflow in mcp_smbus_write()\n\nSmatch Warning:\ndrivers/hid/hid-mcp2221.c:388 mcp_smbus_write() error: __memcpy()\n\u0027\u0026mcp-\u003etxbuf[5]\u0027 too small (59 vs 255)\ndrivers/hid/hid-mcp2221.c:388 mcp_smbus_write() error: __memcpy() \u0027buf\u0027\ntoo small (34 vs 255)\n\nThe \u0027len\u0027 variable can take a value between 0-255 as it can come from\ndata-\u003eblock[0] and it is user data. So add an bound check to prevent a\nbuffer overflow in memcpy().",
  "id": "GHSA-hjmr-93jw-5crw",
  "modified": "2025-06-18T12:30:50Z",
  "published": "2025-06-18T12:30:49Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2022-50131"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/3c0f8a59f2cc8841ee6653399a77f4f3e6e9a270"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/62ac2473553a00229e67bdf3cb023b62cf7f5a9a"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/6402116a7b5ec80fa40fd145a80c813019cd555f"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/66c8e816f2f2ca4a61b406503bd10bad1b35f72f"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/91443c669d280937968f0aa4edefa741cfe35314"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}


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