platform/x86: wmi: Fix opening of char device

{
  "id": "8c1d53cc7f6029e0e8fec39c4533f91af6400f4aae4daa2107ec224efddc0e45",
  "url": "https://osv.dev/vulnerability/CVE-2023-52864",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "platform/x86: wmi: Fix opening of char device",
    "summary": "In the Linux kernel, the following vulnerability has been resolved: platform/x86: wmi: Fix opening of char device Since commit fa1f68db6ca7 (\"drivers: misc: pass miscdevice pointer via file private data\"), the miscdevice stores a pointer to itself inside filp->private_data, which means that private_data will not be NULL when wmi_char_open() is called. This might cause memory corruption should wmi_char_open() be unable to find its driver, something which can happen when the associated WMI device is deleted in wmi_free_devices(). Fix the problem by using the miscdevice pointer to retrieve the WMI device data associated with a char device using container_of(). This also avoids wmi_char_open() picking a wrong WMI device bound to a driver with the same name as the original driver.",
    "evidence": "osv:CVE-2023-52864",
    "products": [
      {
        "name": {
          "value": "Kernel",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
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            "value": "4.19.299",
            "evidence": "/affected/1/ranges"
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            "evidence": "/affected/1/ranges"
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            "evidence": "/affected/1/ranges"
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    "severity": "high",
    "structured": {
      "id": "CVE-2023-52864",
      "aliases": [
        "CVE-2023-52864"
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      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H"
        }
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                  "fixed": "9fb0eed09e1470cd4021ff52b2b9dfcbcee4c203"
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                  "fixed": "d426a2955e45a95b2282764105fcfb110a540453"
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                  "fixed": "e0bf076b734a2fab92d8fddc2b8b03462eee7097"
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          "package": {
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            "ecosystem": "Linux"
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      ],
      "modified": "2026-10-28T02:30:51.560552684Z",
      "provider": "osv",
      "references": [
        "https://git.kernel.org/stable/c/36d85fa7ae0d6be651c1a745191fa7ef055db43e",
        "https://git.kernel.org/stable/c/44a96796d25809502c75771d40ee693c2e44724e",
        "https://git.kernel.org/stable/c/9fb0eed09e1470cd4021ff52b2b9dfcbcee4c203",
        "https://git.kernel.org/stable/c/cf098e937dd125c0317a0d6f261ac2a950a233d6",
        "https://git.kernel.org/stable/c/d426a2955e45a95b2282764105fcfb110a540453",
        "https://git.kernel.org/stable/c/e0bf076b734a2fab92d8fddc2b8b03462eee7097",
        "https://git.kernel.org/stable/c/eba9ac7abab91c8f6d351460239108bef5e7a0b6",
        "https://git.kernel.org/stable/c/fb7b06b59c6887659c6ed0ecd3110835eecbb6a3",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/52xxx/CVE-2023-52864.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2023-52864",
        "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
      ],
      "provider_metadata": {
        "cna_assigner": "Linux",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/52xxx/CVE-2023-52864.json"
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    "related_cves": [
      {
        "value": "CVE-2023-52864",
        "evidence": "/id"
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    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 520084,
  "published_at": "2024-05-21T15:31:55.875+00:00"
}