CVE-2024-26797

/// Technical description

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

drm/amd/display: Prevent potential buffer overflow in map_hw_resources

Adds a check in the map_hw_resources function to prevent a potential

buffer overflow. The function was accessing arrays using an index that

could potentially be greater than the size of the arrays, leading to a

buffer overflow.

Adds a check to ensure that the index is within the bounds of the

arrays. If the index is out of bounds, an error message is printed and

break it will continue execution with just ignoring extra data early to

prevent the buffer overflow.

Reported by smatch:

drivers/gpu/drm/amd/amdgpu/../display/dc/dml2/dml2_wrapper.c:79 map_hw_resources() error: buffer overflow 'dml2->v20.scratch.dml_to_dc_pipe_mapping.disp_cfg_to_stream_id' 6 <= 7

drivers/gpu/drm/amd/amdgpu/../display/dc/dml2/dml2_wrapper.c:81 map_hw_resources() error: buffer overflow 'dml2->v20.scratch.dml_to_dc_pipe_mapping.disp_cfg_to_plane_id' 6 <= 7

/// 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