CVE-2026-68256: drm/amd/display: detect_link_and_local_sink: DP alt mode timeout path leaks prev_sink reference
In the Linux kernel, the following vulnerability has been resolved:
drm/amd/display: detectlinkandlocalsink: DP alt mode timeout path leaks prevsink reference
prevsink is unconditionally retained via dcsinkretain at function entry, but the DP alt mode timeout path inside SIGNALTYPEDISPLAYPORT returns false without releasing prevsink. All other return paths in the function correctly call dcsinkrelease(prevsink), making this the only missing cleanup.
(cherry picked from commit 45510cf662dcf46b5d8926d454f338809f107b9d)
Affected Software
Event History
Frequently Asked Questions
What is the severity of CVE-2026-68256?
CVE-2026-68256 has a severity rating of 10, indicating a critical vulnerability.
How do I fix CVE-2026-68256?
To fix CVE-2026-68256, you should update your Linux kernel to the latest version that includes the patch addressing this vulnerability.
What systems are affected by CVE-2026-68256?
CVE-2026-68256 affects systems running vulnerable versions of the Linux kernel that utilize the AMD display driver.
What are the potential impacts of CVE-2026-68256?
The potential impacts of CVE-2026-68256 include the possibility of unauthorized access to sensitive information due to leaked references.
When was CVE-2026-68256 published?
CVE-2026-68256 was published on August 10, 2026.