CVE-2023-52864

platform/x86: wmi: Fix opening of char device

HIGH

7.8

CVSS Score

Published: May 21, 2024 at 03:31 PM UTC

Updated: August 5, 2026 at 10:24 AM UTC

1 product affected across 1 vendorLinux Kernel

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Severity

HIGH7.8

Exploit prediction

EPSS 0.3%

SSVC

No known exploit

Description

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

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Linux Kernel · Linux

95%

4.15 ≤ v < 4.19.2994.15 ≤ v < 5.10.2014.15 ≤ v < 5.15.1394.15 ≤ v < 5.4.2614.15 ≤ v < 6.1.634.15 ≤ v < 6.5.124.15 ≤ v < 6.6.24.15 ≤ v < 6.74.20 ≤ v < 5.4.2615.11 ≤ v < 5.15.1395.16 ≤ v < 6.1.635.5 ≤ v < 5.10.2016.2 ≤ v < 6.5.126.6 ≤ v < 6.6.24.1544b6b7661132b1b0e5fd3147ded66f1e4a817ca9

Vendor states this is fixed in 36d85fa7ae0d6be651c1a745191fa7ef055db43e (fixed)

Vendor states this is fixed in 44a96796d25809502c75771d40ee693c2e44724e (fixed)

Vendor states this is fixed in 9fb0eed09e1470cd4021ff52b2b9dfcbcee4c203 (fixed)

Vendor states this is fixed in cf098e937dd125c0317a0d6f261ac2a950a233d6 (fixed)

Vendor states this is fixed in d426a2955e45a95b2282764105fcfb110a540453 (fixed)

Vendor states this is fixed in e0bf076b734a2fab92d8fddc2b8b03462eee7097 (fixed)

Vendor states this is fixed in eba9ac7abab91c8f6d351460239108bef5e7a0b6 (fixed)

Vendor states this is fixed in fb7b06b59c6887659c6ed0ecd3110835eecbb6a3 (fixed)

Vendor states this is fixed in 4.15 (unaffected)

Vendor states this is fixed in 4.19.299 (unaffected)

Vendor states this is fixed in 5.10.201 (unaffected)

Vendor states this is fixed in 5.15.139 (unaffected)