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redhatcveRedhat.comRH:CVE-2023-52864
HistoryMay 23, 2024 - 11:02 a.m.

CVE-2023-52864

2024-05-2311:02:04
redhat.com
access.redhat.com
1
linux kernel
platform/x86
vulnerability
wmi_char_open()
miscdevice pointer
memory corruption
mitigation.

6.6 Medium

AI Score

Confidence

High

0.0004 Low

EPSS

Percentile

13.0%

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.

6.6 Medium

AI Score

Confidence

High

0.0004 Low

EPSS

Percentile

13.0%