CVE-2022-50169

In the Linux kernel, the following vulnerability has been resolved:

wifi: wil6210: debugfs: fix info leak in wil_write_file_wmi()

The simple_write_to_buffer() function will succeed if even a single byte is initialized. However, we need to initialize the whole buffer to prevent information leaks. Just use memdup_user().

A sensitive information leak was discovered in the wil6210 WiFi driver’s wil_write_file_wmi() debugfs interface. The previous implementation used simple_write_to_buffer() without zero-initializing the buffer, potentially exposing uninitialized kernel memory to user space. This issue is resolved by using memdup_user() instead. The vulnerability can be exploited by local users with access to the debugfs interface and may result in a minor disclosure of kernel memory contents.

The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.