CVE-2023-52864

2024-05-2116:15:23

416baaa9-dc9f-4396-8d5f-8c081fb06d67

web.nvd.nist.gov

linux kernel

wmi

char device

memory corruption

miscdevice

container_of

nvd

6.8 Medium

AI Score

Confidence

High

0.0004 Low

EPSS

Percentile

13.1%

JSON

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.

Affected configurations

Vulners

Node

linuxlinux_kernelRange4.15–4.19.299

linuxlinux_kernelRange4.20.0–5.4.261

linuxlinux_kernelRange5.5.0–5.10.201

linuxlinux_kernelRange5.11.0–5.15.139

linuxlinux_kernelRange5.16.0–6.1.63

linuxlinux_kernelRange6.2.0–6.5.12

linuxlinux_kernelRange6.6.0–6.6.2

linuxlinux_kernelRange6.7.0≥

CNA Affected

[
  {
    "product": "Linux",
    "vendor": "Linux",
    "defaultStatus": "unaffected",
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "programFiles": [
      "drivers/platform/x86/wmi.c"
    ],
    "versions": [
      {
        "version": "44b6b7661132",
        "lessThan": "cf098e937dd1",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "44b6b7661132",
        "lessThan": "9fb0eed09e14",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "44b6b7661132",
        "lessThan": "d426a2955e45",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "44b6b7661132",
        "lessThan": "e0bf076b734a",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "44b6b7661132",
        "lessThan": "44a96796d258",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "44b6b7661132",
        "lessThan": "36d85fa7ae0d",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "44b6b7661132",
        "lessThan": "fb7b06b59c68",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "44b6b7661132",
        "lessThan": "eba9ac7abab9",
        "status": "affected",
        "versionType": "git"
      }
    ]
  },
  {
    "product": "Linux",
    "vendor": "Linux",
    "defaultStatus": "affected",
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "programFiles": [
      "drivers/platform/x86/wmi.c"
    ],
    "versions": [
      {
        "version": "4.15",
        "status": "affected"
      },
      {
        "version": "0",
        "lessThan": "4.15",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "4.19.299",
        "lessThanOrEqual": "4.19.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "5.4.261",
        "lessThanOrEqual": "5.4.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "5.10.201",
        "lessThanOrEqual": "5.10.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "5.15.139",
        "lessThanOrEqual": "5.15.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "6.1.63",
        "lessThanOrEqual": "6.1.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "6.5.12",
        "lessThanOrEqual": "6.5.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "6.6.2",
        "lessThanOrEqual": "6.6.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "6.7",
        "lessThanOrEqual": "*",
        "status": "unaffected",
        "versionType": "original_commit_for_fix"
      }
    ]
  }
]