{
  "schema_version": "1.6.1",
  "id": "RPI-CVE-2023-52864",
  "modified": "2026-10-07T17:22:01Z",
  "upstream": [
    "CVE-2023-52864"
  ],
  "published": "2024-05-21T15:34:20Z",
  "summary": "platform/x86: wmi: Fix opening of char device",
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nplatform/x86: wmi: Fix opening of char device\n\nSince commit fa1f68db6ca7 (\"drivers: misc: pass miscdevice pointer via\nfile private data\"), the miscdevice stores a pointer to itself inside\nfilp->private_data, which means that private_data will not be NULL when\nwmi_char_open() is called. This might cause memory corruption should\nwmi_char_open() be unable to find its driver, something which can\nhappen when the associated WMI device is deleted in wmi_free_devices().\n\nFix the problem by using the miscdevice pointer to retrieve the WMI\ndevice data associated with a char device using container_of(). This\nalso avoids wmi_char_open() picking a wrong WMI device bound to a\ndriver with the same name as the original driver.",
  "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": "6.1.63",
            "compiled_filter": false
          }
        }
      }
    }
  ],
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://www.cve.org/CVERecord?id=CVE-2023-52864"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/cf098e937dd125c0317a0d6f261ac2a950a233d6"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/9fb0eed09e1470cd4021ff52b2b9dfcbcee4c203"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/d426a2955e45a95b2282764105fcfb110a540453"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/e0bf076b734a2fab92d8fddc2b8b03462eee7097"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/44a96796d25809502c75771d40ee693c2e44724e"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/36d85fa7ae0d6be651c1a745191fa7ef055db43e"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/fb7b06b59c6887659c6ed0ecd3110835eecbb6a3"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/eba9ac7abab91c8f6d351460239108bef5e7a0b6"
    }
  ],
  "database_specific": {
    "source": "https://git.kernel.org/pub/scm/linux/security/vulns.git",
    "upstream_modified": "2026-08-05T11:24:39Z"
  }
}