{
  "schema_version": "1.6.1",
  "id": "RPI-CVE-2025-68308",
  "modified": "2026-10-07T17:22:01Z",
  "upstream": [
    "CVE-2025-68308"
  ],
  "published": "2025-12-16T15:06:57Z",
  "summary": "can: kvaser_usb: leaf: Fix potential infinite loop in command parsers",
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\ncan: kvaser_usb: leaf: Fix potential infinite loop in command parsers\n\nThe `kvaser_usb_leaf_wait_cmd()` and `kvaser_usb_leaf_read_bulk_callback`\nfunctions contain logic to zero-length commands. These commands are used\nto align data to the USB endpoint's wMaxPacketSize boundary.\n\nThe driver attempts to skip these placeholders by aligning the buffer\nposition `pos` to the next packet boundary using `round_up()` function.\n\nHowever, if zero-length command is found exactly on a packet boundary\n(i.e., `pos` is a multiple of wMaxPacketSize, including 0), `round_up`\nfunction will return the unchanged value of `pos`. This prevents `pos`\nto be increased, causing an infinite loop in the parsing logic.\n\nThis patch fixes this in the function by using `pos + 1` instead.\nThis ensures that even if `pos` is on a boundary, the calculation is\nbased on `pos + 1`, forcing `round_up()` to always return the next\naligned boundary.",
  "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": "6.1.159",
            "compiled_filter": false
          }
        }
      }
    }
  ],
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://www.cve.org/CVERecord?id=CVE-2025-68308"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/58343e0a4d43699f0e2f5b169384bbe4c0217add"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/69c7825df64e24dc15d31631a1fc9145324b1345"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/028e89c7e8b4346302e88df01cc50e0a1f05791a"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/e9dd83a75a7274edef21682c823bf0b66d7b6b7f"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/0897cea266e39166a36111059ba147192b36592f"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/bd8135a560cf6e64f0b98ed4daadf126a38f7f48"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/0c73772cd2b8cc108d5f5334de89ad648d89b9ec"
    }
  ],
  "database_specific": {
    "source": "https://git.kernel.org/pub/scm/linux/security/vulns.git",
    "upstream_modified": "2026-05-12T04:54:46Z"
  }
}