CVE-2026-68256

In the Linux kernel, the following vulnerability has been resolved:<br /> <br /> drm/amd/display: detect_link_and_local_sink: DP alt mode timeout path leaks prev_sink reference<br /> <br /> prev_sink is unconditionally retained via dc_sink_retain at function<br /> entry, but the DP alt mode timeout path inside SIGNAL_TYPE_DISPLAY_PORT<br /> returns false without releasing prev_sink. All other return paths in the<br /> function correctly call dc_sink_release(prev_sink), making this the only<br /> missing cleanup.<br /> <br /> (cherry picked from commit 45510cf662dcf46b5d8926d454f338809f107b9d)