{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "ac584af599452748187cf6d7865b1607c54ee443"
            },
            {
              "fixed": "8ddfe6495c245226a30d8b36e2f4a7aa7712e8d6"
            },
            {
              "fixed": "64b24b713e1a3ea6624480594b4f8c2ff86502f2"
            },
            {
              "fixed": "f72b5567f7c117b46b4058dc6a0c7554f8565561"
            },
            {
              "fixed": "1603dd471f47762e9d1f52304edb3e49a7e62655"
            },
            {
              "fixed": "99f31aa98ab6e3805c455b65bcd01b3d48bdf1a5"
            },
            {
              "fixed": "eae19cab44204537f79146f15a51811b13227c38"
            },
            {
              "fixed": "de3f923ae7d91480ed3ecea1b1e1fc0dc25b597d"
            },
            {
              "fixed": "3fb43a7a5b44713f892c58ead2e5f3a1bc9f4ee7"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "3.19.0"
            },
            {
              "fixed": "5.10.253"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "5.11.0"
            },
            {
              "fixed": "5.15.203"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "5.16.0"
            },
            {
              "fixed": "6.1.168"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.2.0"
            },
            {
              "fixed": "6.6.134"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.7.0"
            },
            {
              "fixed": "6.12.81"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.13.0"
            },
            {
              "fixed": "6.18.22"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.19.0"
            },
            {
              "fixed": "6.19.12"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/31xxx/CVE-2026-31747.json"
  },
  "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": "CVE-2026-31747",
  "modified": "2026-07-08T05:36:10.359868496Z",
  "published": "2026-05-01T14:14:40.844Z",
  "references": [
    {
      "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"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/31xxx/CVE-2026-31747.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-31747"
    },
    {
      "type": "PACKAGE",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
    }
  ],
  "schema_version": "1.7.5",
  "summary": "comedi: me4000: Fix potential overrun of firmware buffer"
}