SB2024102239 - NULL pointer dereference in Linux kernel dc core driver

Description

This security bulletin contains information about 1 security vulnerability.

1) NULL pointer dereference (CVE-ID: CVE-2024-49920)

The vulnerability allows a local user to perform a denial of service (DoS) attack.

The vulnerability exists due to NULL pointer dereference within the dcn32_is_center_timing() function in drivers/gpu/drm/amd/display/dc/resource/dcn32/dcn32_resource_helpers.c, within the dcn32_enable_phantom_plane() function in drivers/gpu/drm/amd/display/dc/resource/dcn32/dcn32_resource.c, within the bw_calcs_data_update_from_pplib() function in drivers/gpu/drm/amd/display/dc/resource/dce112/dce112_resource.c, within the reset_dio_stream_encoder() function in drivers/gpu/drm/amd/display/dc/link/hwss/link_hwss_dio.c, within the dp_set_test_pattern() function in drivers/gpu/drm/amd/display/dc/link/accessories/link_dp_cts.c, within the dcn20_post_unlock_program_front_end() and dcn20_wait_for_blank_complete() functions in drivers/gpu/drm/amd/display/dc/hwss/dcn20/dcn20_hwseq.c, within the hwss_build_fast_sequence() function in drivers/gpu/drm/amd/display/dc/core/dc_hw_sequencer.c. A local user can perform a denial of service (DoS) attack.

Remediation

Install update from vendor's website.

References

• https://git.kernel.org/stable/c/26787fb6c2b2ee0d1a7e1574b36f4711ae40fe27
• https://git.kernel.org/stable/c/fdd5ecbbff751c3b9061d8ebb08e5c96119915b4
• https://mirrors.edge.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.11.3
• https://mirrors.edge.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.12