CVE-2026-68256

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

State: Published
Severity: Not scored
Published: Aug 10, 2026
Updated: Aug 17, 2026
Reserved: Jul 30, 2026

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)

Scores

The record has no CVSS score.

Weaknesses

The record names no weakness.

Affected Products

Product	Versions
LinuxLinux	54618888d1ea7a26f8bccfb89e3c2420350c8047 to before f9922828a4ebd26286fbe0286cc61695e7d9b07bAffected 54618888d1ea7a26f8bccfb89e3c2420350c8047 to before a59e493567d18ef3858be9368acd132a01ebfa09Affected 54618888d1ea7a26f8bccfb89e3c2420350c8047 to before 4ee77643e6194f2deb62fe62f04396f9825e27d8Affected 54618888d1ea7a26f8bccfb89e3c2420350c8047 to before 58ea24dd96848626039296e9e8510270ec8dc4bfAffected 54618888d1ea7a26f8bccfb89e3c2420350c8047 to before a6e14b976be48eebd8769cb5b883a6af7fc5ade1Affected
LinuxLinux	6.3Affected before 6.3Not affected 6.6.148 through 6.6.Not affected 6.12.101 through 6.12.Not affected 6.18.42 through 6.18.Not affected 7.1.6 through 7.1.Not affected 7.2 and laterNot affected

Product

Versions

LinuxLinux

54618888d1ea7a26f8bccfb89e3c2420350c8047 to before f9922828a4ebd26286fbe0286cc61695e7d9b07bAffected
54618888d1ea7a26f8bccfb89e3c2420350c8047 to before a59e493567d18ef3858be9368acd132a01ebfa09Affected
54618888d1ea7a26f8bccfb89e3c2420350c8047 to before 4ee77643e6194f2deb62fe62f04396f9825e27d8Affected
54618888d1ea7a26f8bccfb89e3c2420350c8047 to before 58ea24dd96848626039296e9e8510270ec8dc4bfAffected
54618888d1ea7a26f8bccfb89e3c2420350c8047 to before a6e14b976be48eebd8769cb5b883a6af7fc5ade1Affected

LinuxLinux

6.3Affected
before 6.3Not affected
6.6.148 through 6.6.*Not affected
6.12.101 through 6.12.*Not affected
6.18.42 through 6.18.*Not affected
7.1.6 through 7.1.*Not affected
7.2 and laterNot affected

References

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