{
  "schema_version": "1.6.1",
  "id": "RPI-CVE-2026-64280",
  "modified": "2026-10-07T17:22:01Z",
  "upstream": [
    "CVE-2026-64280"
  ],
  "published": "2026-07-25T08:51:45Z",
  "summary": "fpga: dfl-afu: validate DMA mapping length in afu_dma_map_region()",
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nfpga: dfl-afu: validate DMA mapping length in afu_dma_map_region()\n\nafu_ioctl_dma_map() accepts a 64-bit length from userspace via\nDFL_FPGA_PORT_DMA_MAP ioctl without an upper bound check. The value\nis passed to afu_dma_pin_pages() where npages is derived as\nlength >> PAGE_SHIFT and passed to pin_user_pages_fast() which takes\nint nr_pages, causing implicit truncation if length is very large.\n\nValidate map.length at the ioctl entry point before calling\nafu_dma_map_region(), rejecting values whose page count exceeds\nINT_MAX.",
  "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": "6.1.184",
            "compiled_filter": false
          }
        }
      }
    }
  ],
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-64280"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/5352d488ce4ae5e8c68c080ad4c3a5f084ad5fbc"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/d7e787eee2ea619b6dbb98890472ee73daf2e7fd"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/a6a3884ff500f04f3088d6d09eec803cd35331a2"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/16381bda90b261a656ded0568630c1b857b2ebc8"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/b50e6cd2395cde615f59b624819998d28c0668d6"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/59070040fd12e0b78d7b4d341d9f9a183237c5ff"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/fb2c0eab51ae5b02d2bae7d67c2cfbec39b57231"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/fc3b071a7c8dc0f5d56defddf6e6fd5aaa3e1e27"
    }
  ],
  "database_specific": {
    "source": "https://git.kernel.org/pub/scm/linux/security/vulns.git",
    "upstream_modified": "2026-08-23T12:46:35Z"
  }
}