CVE-2024-36969

/// Technical description

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

drm/amd/display: Fix division by zero in setup_dsc_config

When slice_height is 0, the division by slice_height in the calculation

of the number of slices will cause a division by zero driver crash. This

leaves the kernel in a state that requires a reboot. This patch adds a

check to avoid the division by zero.

The stack trace below is for the 6.8.4 Kernel. I reproduced the issue on

a Z16 Gen 2 Lenovo Thinkpad with a Apple Studio Display monitor

connected via Thunderbolt. The amdgpu driver crashed with this exception

when I rebooted the system with the monitor connected.

kernel: ? die (arch/x86/kernel/dumpstack.c:421 arch/x86/kernel/dumpstack.c:434 arch/x86/kernel/dumpstack.c:447)

kernel: ? do_trap (arch/x86/kernel/traps.c:113 arch/x86/kernel/traps.c:154)

kernel: ? setup_dsc_config (drivers/gpu/drm/amd/amdgpu/../display/dc/dsc/dc_dsc.c:1053) amdgpu

kernel: ? do_error_trap (./arch/x86/include/asm/traps.h:58 arch/x86/k

/// Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

/// References