{
  "schema_version": "1.6.1",
  "id": "RPI-CVE-2025-38481",
  "modified": "2026-10-07T17:22:01Z",
  "upstream": [
    "CVE-2025-38481"
  ],
  "published": "2025-07-28T11:22:31Z",
  "summary": "comedi: Fail COMEDI_INSNLIST ioctl if n_insns is too large",
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\ncomedi: Fail COMEDI_INSNLIST ioctl if n_insns is too large\n\nThe handling of the `COMEDI_INSNLIST` ioctl allocates a kernel buffer to\nhold the array of `struct comedi_insn`, getting the length from the\n`n_insns` member of the `struct comedi_insnlist` supplied by the user.\nThe allocation will fail with a WARNING and a stack dump if it is too\nlarge.\n\nAvoid that by failing with an `-EINVAL` error if the supplied `n_insns`\nvalue is unreasonable.\n\nDefine the limit on the `n_insns` value in the `MAX_INSNS` macro.  Set\nthis to the same value as `MAX_SAMPLES` (65536), which is the maximum\nallowed sum of the values of the member `n` in the array of `struct\ncomedi_insn`, and sensible comedi instructions will have an `n` of at\nleast 1.",
  "affected": [
    {
      "package": {
        "ecosystem": "Raspberry Pi OS:12",
        "name": "linux"
      },
      "versions": [
        "1:6.1.47-1+rpt4"
      ],
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "linux-image-6.1.0-rpi3-rpi-2712",
            "binary_version": "1:6.1.47-1+rpt4"
          },
          {
            "binary_name": "linux-image-6.1.0-rpi3-rpi-v6",
            "binary_version": "1:6.1.47-1+rpt4"
          },
          {
            "binary_name": "linux-image-6.1.0-rpi3-rpi-v7",
            "binary_version": "1:6.1.47-1+rpt4"
          },
          {
            "binary_name": "linux-image-6.1.0-rpi3-rpi-v7l",
            "binary_version": "1:6.1.47-1+rpt4"
          },
          {
            "binary_name": "linux-image-6.1.0-rpi3-rpi-v8",
            "binary_version": "1:6.1.47-1+rpt4"
          }
        ]
      },
      "database_specific": {
        "per_version": {
          "1:6.1.47-1+rpt4": {
            "linux_commit": "655fc658a15ae7a6f37103754adb39ba52a9a14e",
            "upstream_version": "6.1.47",
            "assessment": "commit ancestry (strak rule)",
            "upstream_fixed": "6.1.147",
            "compiled_filter": false
          }
        }
      }
    }
  ],
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://www.cve.org/CVERecord?id=CVE-2025-38481"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/454d732dfd0aef7d7aa950c409215ca06d717e93"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/c68257588e87f45530235701a42496b7e9e56adb"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/69dc06b9514522de532e997a21d035cd29b0db44"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/d4c73ce13f5b5a0fe0319f1f352ff602f0ace8e3"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/c9d3d9667443caafa804cd07940aeaef8e53aa90"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/992d600f284e719242a434166e86c1999649b71c"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/e3b8322cc8081d142ee4c1a43e1d702bdba1ed76"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/08ae4b20f5e82101d77326ecab9089e110f224cc"
    }
  ],
  "database_specific": {
    "source": "https://git.kernel.org/pub/scm/linux/security/vulns.git",
    "upstream_modified": "2026-05-12T04:54:46Z"
  }
}