IT

Tracker / CVE-2023-52864

CVE-2023-52864

High 7.0

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.

Affected products and versions

linux linux_kernel · 4.15 → 4.19.299
linux linux_kernel · 4.20 → 5.4.261
linux linux_kernel · 5.11 → 5.15.139
linux linux_kernel · 5.16 → 6.1.63
linux linux_kernel · 5.5 → 5.10.201
linux linux_kernel · 6.2 → 6.5.12
linux linux_kernel · 6.6 → 6.6.2

Analysis

This page is not indexable yet.Until it carries original analysis — what it actually exposes, how to check in two minutes whether a system was touched, what to do if it was — the page stays noindex. The database decides that, not the template.

References