CVE-2022-49960: 
Linux Kernel vulnerability analysis and mitigation

CVE-2022-49960 is a vulnerability in the Linux kernel affecting the drm/i915 display driver. The issue was discovered in the Intel graphics driver where a null pointer dereference occurs in the tglgetbwinfo() function located in drivers/gpu/drm/i915/display/intelbw.c. This vulnerability specifically affects systems using Intel graphics hardware, particularly noted on the Asus Chromebook CX550 during boot with kernel version 5.17-rc1 (Wiz Security).

The vulnerability manifests as a null pointer dereference of binext in the tglgetbwinfo() function. When triggered, it results in a kernel panic with the error message indicating a NULL pointer dereference at address 0x000000000000002e. The issue occurs during the system boot process and affects the kernel's handling of Intel graphics hardware initialization (Wiz Security).

When exploited, this vulnerability causes a kernel panic, leading to system crashes during the boot process. This effectively creates a denial of service condition, preventing affected systems from properly booting and functioning (Wiz Security).

The issue has been addressed in various Linux distributions through kernel updates. For example, Debian has fixed this in version 5.10.237-1 for the bullseye release. Ubuntu has also included fixes for this vulnerability in their security updates (Wiz Security).