CVE-2026-68256
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)
CSIRTS triage
- What
- A DP alt mode timeout handling path in drm/amd/display leaks the prev_sink reference.
- Who is affected
- Linux systems with AMD discrete graphics using DisplayPort alternative mode.
- Urgency
- Low priority; CVSS 3.3 indicates memory leak that may degrade system over time.
- Action
- Apply kernel patch to properly release prev_sink reference in DP alt mode timeout path.
AI-assisted analysis generated from the source advisory — verify against the original.
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Exploitation outlook
- Low exploitation risk0.18% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 7% of all EPSS-scored CVEs.
Advisory coverage (2)
External references
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