{
  "schema_version": "1.6.1",
  "id": "RPI-CVE-2025-68347",
  "modified": "2026-10-09T11:39:44Z",
  "upstream": [
    "CVE-2025-68347"
  ],
  "published": "2025-12-24T10:35:22Z",
  "summary": "ALSA: firewire-motu: fix buffer overflow in hwdep read for DSP events",
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nALSA: firewire-motu: fix buffer overflow in hwdep read for DSP events\n\nThe DSP event handling code in hwdep_read() could write more bytes to\nthe user buffer than requested, when a user provides a buffer smaller\nthan the event header size (8 bytes).\n\nFix by using min_t() to clamp the copy size, This ensures we never copy\nmore than the user requested.",
  "severity": [
    {
      "type": "CVSS_V3",
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"
    }
  ],
  "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": "6.1.160",
            "compiled_filter": false
          }
        }
      }
    }
  ],
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://www.cve.org/CVERecord?id=CVE-2025-68347"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/16620f0617400746984362c3d6ac547eeae1d35f"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/ddd32ec66bc4eb6969fe835e4cc1c0706c6348fe"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/6275fd726d53a8ec724f20201cf3bd862711e17b"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/161291bac551821bba98eb4ea84c82338578d1b0"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/cdda0d06f8650e33255f79839f188bbece44117c"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/210d77cca3d0494ed30a5c628b20c1d95fa04fb1"
    }
  ],
  "database_specific": {
    "source": "https://git.kernel.org/pub/scm/linux/security/vulns.git",
    "upstream_modified": "2026-08-05T12:19:11Z",
    "severity": {
      "source": "kernel CNA",
      "cvss_v3_score": 7.8,
      "cvss_v3_severity": "High",
      "scenario": "AV:L - Exploitation reaches the vulnerable callback through read() on the local ALSA hwdep device; the connected MOTU interface is a deployment prerequisite rather than the attack channel.\nAC:L - A device-authorized attacker can start streaming, induce or await a DSP parameter event, and deterministically request fewer than eight bytes. No race or condition outside the attacker\u2019s influence is required.\nPR:L - The path has no capability or namespace check, but requires ordinary access to the ALSA device node, commonly granted to an active unprivileged user or audio-group member.\nUI:N - No human victim action is required once a DSP event is queued; the attacker or an automatically operating consumer can trigger the faulty read.\nS:U - The corruption occurs within the host\u2019s kernel/userspace security authority and does not cross a VM, IOMMU, or comparable isolation boundary.\nC:H - The direct header contains no secret, but the out-of-bounds write can corrupt adjacent allocator or control data in a privileged consumer. Under the required higher-severity assumption, resulting control-flow compromise could expose all data accessible to that process.\nI:H - The kernel writes an eight-byte header despite a request for as few as zero bytes, allowing up to seven bytes of adjacent userspace memory corruption. Such an out-of-bounds write can corrupt pointers or allocator metadata and potentially enable control-flow hijacking.\nA:H - The overwrite can crash the consuming process, and the still-queued or repeatedly induced DSP event permits recurring denial of a critical audio or control service."
    }
  }
}