{
  "schema_version": "1.6.1",
  "id": "RPI-CVE-2025-39937",
  "modified": "2026-10-07T17:22:01Z",
  "upstream": [
    "CVE-2025-39937"
  ],
  "published": "2025-10-04T07:33:57Z",
  "summary": "net: rfkill: gpio: Fix crash due to dereferencering uninitialized pointer",
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: rfkill: gpio: Fix crash due to dereferencering uninitialized pointer\n\nSince commit 7d5e9737efda (\"net: rfkill: gpio: get the name and type from\ndevice property\") rfkill_find_type() gets called with the possibly\nuninitialized \"const char *type_name;\" local variable.\n\nOn x86 systems when rfkill-gpio binds to a \"BCM4752\" or \"LNV4752\"\nacpi_device, the rfkill->type is set based on the ACPI acpi_device_id:\n\n        rfkill->type = (unsigned)id->driver_data;\n\nand there is no \"type\" property so device_property_read_string() will fail\nand leave type_name uninitialized, leading to a potential crash.\n\nrfkill_find_type() does accept a NULL pointer, fix the potential crash\nby initializing type_name to NULL.\n\nNote likely sofar this has not been caught because:\n\n1. Not many x86 machines actually have a \"BCM4752\"/\"LNV4752\" acpi_device\n2. The stack happened to contain NULL where type_name is stored",
  "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": "6.1.154",
            "compiled_filter": false
          }
        }
      }
    }
  ],
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://www.cve.org/CVERecord?id=CVE-2025-39937"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/184f608a68f96794e8fe58cd5535014d53622cde"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/8793e7a8e1b60131a825457174ed6398111daeb7"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/ada2282259243387e6b6e89239aeb4897e62f051"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/47ade5f9d70b23a119ec20b1c6504864b2543a79"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/689aee35ce671aab752f159e5c8e66d7685e6887"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/21ba85d9d508422ca9e6698463ff9357c928c22d"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/21a39b958b4bcf44f7674bfbbe1bbb8cad0d842d"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/b6f56a44e4c1014b08859dcf04ed246500e310e5"
    }
  ],
  "database_specific": {
    "source": "https://git.kernel.org/pub/scm/linux/security/vulns.git",
    "upstream_modified": "2026-05-12T04:54:46Z"
  }
}