Kernel Performance Issue in Qualcomm Technologies Products

CVE-2022-50371

What is CVE-2022-50371?

A vulnerability was identified in the Linux kernel's interaction with the Qualcomm LPG driver, where the function responsible for setting LED brightness could unexpectedly enter a sleeping state. This behavior conflicts with the kernel's requirement that the brightness_set callback must operate non-blocking, leading to potential performance degradation and unintended system behavior. The issue has been addressed by modifying the driver to invoke a blocking call for brightness adjustments appropriately, enhancing stability and responsiveness within systems utilizing Qualcomm hardware.

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