CVE-2024-50177

Technical Description

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

drm/amd/display: fix a UBSAN warning in DML2.1

When programming phantom pipe, since cursor_width is explicity set to 0,

this causes calculation logic to trigger overflow for an unsigned int

triggering the kernel's UBSAN check as below:

[ 40.962845] UBSAN: shift-out-of-bounds in /tmp/amd.EfpumTkO/amd/amdgpu/../display/dc/dml2/dml21/src/dml2_core/dml2_core_dcn4_calcs.c:3312:34

[ 40.962849] shift exponent 4294967170 is too large for 32-bit type 'unsigned int'

[ 40.962852] CPU: 1 PID: 1670 Comm: gnome-shell Tainted: G W OE 6.5.0-41-generic #41~22.04.2-Ubuntu

[ 40.962854] Hardware name: Gigabyte Technology Co., Ltd. X670E AORUS PRO X/X670E AORUS PRO X, BIOS F21 01/10/2024

[ 40.962856] Call Trace:

[ 40.962857] <TASK>

[ 40.962860] dump_stack_lvl+0x48/0x70

[ 40.962870] dump_stack+0x10/0x20

[ 40.962872] __ubsan_handle_shift_out_of_bounds+0x1ac/0x360

[ 40.962878] calculate_cursor_req_attr

Remediation

Check the references section for vendor advisories and patches from linux. Update linux_kernel to the latest patched version. 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.

Affected Products

References