#VU98927 NULL pointer dereference in Linux kernel - CVE-2024-49920
Vulnerability identifier: #VU98927
Vulnerability risk: Low
CVSSv4.0: 4.3 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]
CVE-ID:
CWE-ID:
CWE-476
Exploitation vector: Local
Exploit availability: No
Vulnerable software:
Linux kernel
Operating systems & Components /
Operating system
Vendor: Linux Foundation
Description
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.
Mitigation
Install update from vendor's website.
Vulnerable software versions
Linux kernel: 6.11, 6.11.1, 6.11.2
External links
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
Q & A
Can this vulnerability be exploited remotely?
No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.
