{
  "schema_version": "1.6.1",
  "id": "RPI-CVE-2025-40293",
  "modified": "2026-10-07T17:22:01Z",
  "upstream": [
    "CVE-2025-40293"
  ],
  "published": "2025-12-08T00:47:38Z",
  "summary": "iommufd: Don't overflow during division for dirty tracking",
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\niommufd: Don't overflow during division for dirty tracking\n\nIf pgshift is 63 then BITS_PER_TYPE(*bitmap->bitmap) * pgsize will overflow\nto 0 and this triggers divide by 0.\n\nIn this case the index should just be 0, so reorganize things to divide\nby shift and avoid hitting any overflows.",
  "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-2025-40293"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/07105e61882ff4a7d58db63cc5f9e90c6c60506c"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/4c8a4f1d34eced168cc0b3a3dfe7b6dcc2090f69"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/de7f2c67ceb1941b05b04ac35458a03e93cc57b1"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/dbf316fc90aa954dcd5440817f4b944627ed63e0"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/cb30dfa75d55eced379a42fd67bd5fb7ec38555e"
    }
  ],
  "database_specific": {
    "source": "https://git.kernel.org/pub/scm/linux/security/vulns.git",
    "upstream_modified": "2026-05-12T04:54:46Z"
  }
}