CVE-2026-68256

/// Technical description

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

drm/amd/display: detect_link_and_local_sink: DP alt mode timeout path leaks prev_sink reference

prev_sink is unconditionally retained via dc_sink_retain at function

entry, but the DP alt mode timeout path inside SIGNAL_TYPE_DISPLAY_PORT

returns false without releasing prev_sink. All other return paths in the

function correctly call dc_sink_release(prev_sink), making this the only

missing cleanup.

(cherry picked from commit 45510cf662dcf46b5d8926d454f338809f107b9d)

/// Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

/// References