CVE-2022-49773: 
Linux Kernel vulnerability analysis and mitigation

CVE-2022-49773 is a vulnerability discovered in the Linux kernel's display driver component, specifically affecting the AMD display driver (drm/amd/display). The issue was identified in May 2025 and involves the optc2configurecrc() function that incorrectly wraps optc1configurecrc() for dcn314 systems (Wiz Database, NVD).

The vulnerability occurs when dcn314 uses optc2configurecrc() which wraps optc1configurecrc() and sets additional registers not applicable to dcn314. This implementation leads to warning messages in the system logs, specifically in the drivers/gpu/drm/amd/amdgpu/../display/dc/dchelper.c file. The call trace involves genericregsetex, optc2configurecrc, dcstreamconfigurecrc, and amdgpudmcrtcconfigurecrcsource functions (Debian Tracker, Wiz Database).

The impact of this vulnerability is considered non-critical and primarily results in warning messages being generated in system logs when the affected code path is executed. The issue does not pose significant security risks to the system (Wiz Database).

The vulnerability has been resolved by directly using optc1configurecrc() instead of the wrapped function. The fix has been implemented in various Linux distributions, including Debian versions bookworm (6.1.129-1), bookworm security (6.1.135-1), trixie (6.12.22-1), and sid (6.12.25-1) (Debian Tracker).