Bug 2513298 (CVE-2026-68256) - CVE-2026-68256 kernel: drm/amd/display: detect_link_and_local_sink: DP alt mode timeout path leaks prev_sink reference
Summary: CVE-2026-68256 kernel: drm/amd/display: detect_link_and_local_sink: DP alt mo...
Keywords:
Status: NEW
Alias: CVE-2026-68256
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
low
low
Target Milestone: ---
Assignee: Product Security
QA Contact:
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-08-10 12:29 UTC by OSIDB Bzimport
Modified: 2026-08-13 16:11 UTC (History)
2 users (show)

Fixed In Version:
Clone Of:
Environment:
Last Closed:
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Description OSIDB Bzimport 2026-08-10 12:29:34 UTC 
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)
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