#VU94961 NULL pointer dereference in Linux kernel - CVE-2024-42122
Vulnerability identifier: #VU94961
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 dcn31_hpo_dp_link_encoder_create() function in drivers/gpu/drm/amd/display/dc/resource/dcn351/dcn351_resource.c, within the dcn31_hpo_dp_link_encoder_create() function in drivers/gpu/drm/amd/display/dc/resource/dcn35/dcn35_resource.c, within the dcn321_hpo_dp_link_encoder_create() function in drivers/gpu/drm/amd/display/dc/resource/dcn321/dcn321_resource.c, within the dcn32_hpo_dp_link_encoder_create() and dml1_validate() functions in drivers/gpu/drm/amd/display/dc/resource/dcn32/dcn32_resource.c, within the dcn31_hpo_dp_link_encoder_create() function in drivers/gpu/drm/amd/display/dc/resource/dcn316/dcn316_resource.c, within the dcn31_hpo_dp_link_encoder_create() function in drivers/gpu/drm/amd/display/dc/resource/dcn315/dcn315_resource.c, within the dcn31_hpo_dp_link_encoder_create() and dcn314_validate_bandwidth() functions in drivers/gpu/drm/amd/display/dc/resource/dcn314/dcn314_resource.c, within the dcn31_hpo_dp_link_encoder_create() and dcn31_validate_bandwidth() functions in drivers/gpu/drm/amd/display/dc/resource/dcn31/dcn31_resource.c, within the dcn30_validate_bandwidth() function in drivers/gpu/drm/amd/display/dc/resource/dcn30/dcn30_resource.c, within the dcn32_clk_mgr_construct() function in drivers/gpu/drm/amd/display/dc/clk_mgr/dcn32/dcn32_clk_mgr.c, within the dcn3_clk_mgr_construct() function in drivers/gpu/drm/amd/display/dc/clk_mgr/dcn30/dcn30_clk_mgr.c. A local user can perform a denial of service (DoS) attack.
Mitigation
Install update from vendor's website.
Vulnerable software versions
Linux kernel: All versions
External links
https://git.kernel.org/stable/c/062edd612fcd300f0f79a36fca5b8b6a5e2fce70
https://git.kernel.org/stable/c/8e65a1b7118acf6af96449e1e66b7adbc9396912
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.
