GHSA-28WG-V83V-VRGH

Vulnerability from github – Published: 2026-05-01 15:30 – Updated: 2026-05-01 15:30
VLAI?
Details

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

comedi: me4000: Fix potential overrun of firmware buffer

me4000_xilinx_download() loads the firmware that was requested by request_firmware(). It is possible for it to overrun the source buffer because it blindly trusts the file format. It reads a data stream length from the first 4 bytes into variable file_length and reads the data stream contents of length file_length from offset 16 onwards.

Add a test to ensure that the supplied firmware is long enough to contain the header and the data stream. On failure, log an error and return -EINVAL.

Note: The firmware loading was totally broken before commit ac584af59945 ("staging: comedi: me4000: fix firmware downloading"), but that is the most sensible target for this fix.

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{
  "affected": [],
  "aliases": [
    "CVE-2026-31747"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-05-01T15:16:37Z",
    "severity": null
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\ncomedi: me4000: Fix potential overrun of firmware buffer\n\n`me4000_xilinx_download()` loads the firmware that was requested by\n`request_firmware()`.  It is possible for it to overrun the source\nbuffer because it blindly trusts the file format.  It reads a data\nstream length from the first 4 bytes into variable `file_length` and\nreads the data stream contents of length `file_length` from offset 16\nonwards.\n\nAdd a test to ensure that the supplied firmware is long enough to\ncontain the header and the data stream.  On failure, log an error and\nreturn `-EINVAL`.\n\nNote: The firmware loading was totally broken before commit ac584af59945\n(\"staging: comedi: me4000: fix firmware downloading\"), but that is the\nmost sensible target for this fix.",
  "id": "GHSA-28wg-v83v-vrgh",
  "modified": "2026-05-01T15:30:34Z",
  "published": "2026-05-01T15:30:34Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-31747"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/1603dd471f47762e9d1f52304edb3e49a7e62655"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/3fb43a7a5b44713f892c58ead2e5f3a1bc9f4ee7"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/64b24b713e1a3ea6624480594b4f8c2ff86502f2"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/8ddfe6495c245226a30d8b36e2f4a7aa7712e8d6"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/99f31aa98ab6e3805c455b65bcd01b3d48bdf1a5"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/de3f923ae7d91480ed3ecea1b1e1fc0dc25b597d"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/eae19cab44204537f79146f15a51811b13227c38"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/f72b5567f7c117b46b4058dc6a0c7554f8565561"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}


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