CVE-2022-49969

In the Linux kernel, the following vulnerability has been resolved:

drm/amd/display: clear optc underflow before turn off odm clock

[Why] After ODM clock off, optc underflow bit will be kept there always and clear not work. We need to clear that before clock off.

[How] Clear that if have when clock off.

This vulnerability is rated as Moderate severity because exploitation requires local access on systems equipped with physical AMD graphics hardware utilizing the amdgpu driver. The issue arises from a failure to clear display timing controller underflow flags prior to disabling the output data mapping clock, which can leave the display controller in an unrecoverable state and trigger a local denial of service. Typical enterprise server deployments and virtual machine instances lacking dedicated AMD GPU pass-through do not load this driver and remain unaffected.

The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.