Linux Kernel Command Mode Horizontal Timing Adjustment Vulnerability in Intel DSI Driver

A vulnerability in the Linux kernel's Intel DSI driver for display management has been addressed. The issue arose from improper horizontal timing adjustments in command mode, which were based on the compression ratio. This practice led to a division-by-zero error on some machines, as the adjusted horizontal total became so small that it resulted in a zero value when calculating the vertical total in command mode. Although this fix does not resolve display issues on the Huawei Matebook E, it prevents the kernel from crashing when the driver is loaded.

Impact

The vulnerability could cause a kernel crash when the Intel DSI driver is loaded, particularly on machines where the improper timing adjustments led to a division-by-zero error.

Remediation

Users can apply the latest patches available in the Linux kernel stable tree to address this vulnerability.