CVE-2026-68256 PUBLISHED

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

Assigner: Linux
Reserved: 30.07.2026 Published: 10.08.2026 Updated: 10.08.2026

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)

Product Status

Vendor Linux
Product Linux
Versions Default: unaffected
  • affected from 54618888d1ea7a26f8bccfb89e3c2420350c8047 to f9922828a4ebd26286fbe0286cc61695e7d9b07b (excl.)
  • affected from 54618888d1ea7a26f8bccfb89e3c2420350c8047 to a59e493567d18ef3858be9368acd132a01ebfa09 (excl.)
  • affected from 54618888d1ea7a26f8bccfb89e3c2420350c8047 to 4ee77643e6194f2deb62fe62f04396f9825e27d8 (excl.)
  • affected from 54618888d1ea7a26f8bccfb89e3c2420350c8047 to 58ea24dd96848626039296e9e8510270ec8dc4bf (excl.)
  • affected from 54618888d1ea7a26f8bccfb89e3c2420350c8047 to a6e14b976be48eebd8769cb5b883a6af7fc5ade1 (excl.)
Vendor Linux
Product Linux
Versions Default: affected
  • Version 6.3 is affected
  • unaffected from 0 to 6.3 (excl.)
  • unaffected from 6.6.148 to 6.6.* (incl.)
  • unaffected from 6.12.101 to 6.12.* (incl.)
  • unaffected from 6.18.42 to 6.18.* (incl.)
  • unaffected from 7.1.6 to 7.1.* (incl.)
  • unaffected from 7.2-rc2 to * (incl.)

References