Linux Kernel Divide-By-Zero Vulnerability in drm_mode_vrefresh Function

A vulnerability in the Linux kernel's Direct Rendering Manager (DRM) module has been addressed. The issue was a divide-by-zero vulnerability in the drm_mode_vrefresh() function, which calculates the vertical refresh rate of a display mode. The function attempted to prevent division by zero by checking if the horizontal or vertical total values were zero. However, this check was insufficient, leading to a potential divide-by-zero error when the total values were manipulated.

Impact

Exploitation of this vulnerability could lead to a divide-by-zero error, which may cause a denial-of-service condition by crashing the system or application.