#VU98926 NULL pointer dereference in Linux kernel - CVE-2024-49921
Vulnerability identifier: #VU98926
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 dp_verify_link_cap_with_retries() function in drivers/gpu/drm/amd/display/dc/link/protocols/link_dp_capability.c, within the dcn35_init_hw() and dcn35_calc_blocks_to_gate() functions in drivers/gpu/drm/amd/display/dc/hwss/dcn35/dcn35_hwseq.c, within the dcn31_init_hw() function in drivers/gpu/drm/amd/display/dc/hwss/dcn31/dcn31_hwseq.c, within the dcn10_init_hw() function in drivers/gpu/drm/amd/display/dc/hwss/dcn10/dcn10_hwseq.c, within the dce110_edp_backlight_control() function in drivers/gpu/drm/amd/display/dc/hwss/dce110/dce110_hwseq.c, within the hubp2_is_flip_pending() function in drivers/gpu/drm/amd/display/dc/hubp/dcn20/dcn20_hubp.c, within the hubp1_is_flip_pending() function in drivers/gpu/drm/amd/display/dc/hubp/dcn10/dcn10_hubp.c, within the dce11_pplib_apply_display_requirements() function in drivers/gpu/drm/amd/display/dc/clk_mgr/dce110/dce110_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/5b35bf1a82eb29841b67ff5643ba83762250fc24
https://git.kernel.org/stable/c/be1fb44389ca3038ad2430dac4234669bc177ee3
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.
