CVE-2026-68256
drm/amd/display: detect_link_and_local_sink: DP alt mode timeout path leaks prev_sink reference
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)
INFO
Published Date :
Aug. 10, 2026, 1:20 p.m.
Last Modified :
Aug. 17, 2026, 5:18 a.m.
Remotely Exploit :
No
Source :
416baaa9-dc9f-4396-8d5f-8c081fb06d67
Solution
- Update the Linux kernel to the fixed version.
- Verify the patch is applied correctly.
- Restart affected systems if necessary.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-68256.
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-68256 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-68256
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-68256 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-68256 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
CVE Modified by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Aug. 17, 2026
Action Type Old Value New Value Changed Affected [{'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '54618888d1ea7a26f8bccfb89e3c2420350c8047', 'lessThan': 'f9922828a4ebd26286fbe0286cc61695e7d9b07b', 'versionType': 'git'}, {'status': 'affected', 'version': '54618888d1ea7a26f8bccfb89e3c2420350c8047', 'lessThan': 'a59e493567d18ef3858be9368acd132a01ebfa09', 'versionType': 'git'}, {'status': 'affected', 'version': '54618888d1ea7a26f8bccfb89e3c2420350c8047', 'lessThan': '4ee77643e6194f2deb62fe62f04396f9825e27d8', 'versionType': 'git'}, {'status': 'affected', 'version': '54618888d1ea7a26f8bccfb89e3c2420350c8047', 'lessThan': '58ea24dd96848626039296e9e8510270ec8dc4bf', 'versionType': 'git'}, {'status': 'affected', 'version': '54618888d1ea7a26f8bccfb89e3c2420350c8047', 'lessThan': 'a6e14b976be48eebd8769cb5b883a6af7fc5ade1', 'versionType': 'git'}], 'programFiles': ['drivers/gpu/drm/amd/display/dc/link/link_detection.c'], 'defaultStatus': 'unaffected'}, {'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '6.3'}, {'status': 'unaffected', 'version': '0', 'lessThan': '6.3', 'versionType': 'semver'}, {'status': 'unaffected', 'version': '6.6.148', 'versionType': 'semver', 'lessThanOrEqual': '6.6.*'}, {'status': 'unaffected', 'version': '6.12.101', 'versionType': 'semver', 'lessThanOrEqual': '6.12.*'}, {'status': 'unaffected', 'version': '6.18.42', 'versionType': 'semver', 'lessThanOrEqual': '6.18.*'}, {'status': 'unaffected', 'version': '7.1.6', 'versionType': 'semver', 'lessThanOrEqual': '7.1.*'}, {'status': 'unaffected', 'version': '7.2-rc2', 'versionType': 'original_commit_for_fix', 'lessThanOrEqual': '*'}], 'programFiles': ['drivers/gpu/drm/amd/display/dc/link/link_detection.c'], 'defaultStatus': 'affected'}] [{'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '54618888d1ea7a26f8bccfb89e3c2420350c8047', 'lessThan': 'f9922828a4ebd26286fbe0286cc61695e7d9b07b', 'versionType': 'git'}, {'status': 'affected', 'version': '54618888d1ea7a26f8bccfb89e3c2420350c8047', 'lessThan': 'a59e493567d18ef3858be9368acd132a01ebfa09', 'versionType': 'git'}, {'status': 'affected', 'version': '54618888d1ea7a26f8bccfb89e3c2420350c8047', 'lessThan': '4ee77643e6194f2deb62fe62f04396f9825e27d8', 'versionType': 'git'}, {'status': 'affected', 'version': '54618888d1ea7a26f8bccfb89e3c2420350c8047', 'lessThan': '58ea24dd96848626039296e9e8510270ec8dc4bf', 'versionType': 'git'}, {'status': 'affected', 'version': '54618888d1ea7a26f8bccfb89e3c2420350c8047', 'lessThan': 'a6e14b976be48eebd8769cb5b883a6af7fc5ade1', 'versionType': 'git'}], 'programFiles': ['drivers/gpu/drm/amd/display/dc/link/link_detection.c'], 'defaultStatus': 'unaffected'}, {'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '6.3'}, {'status': 'unaffected', 'version': '0', 'lessThan': '6.3', 'versionType': 'semver'}, {'status': 'unaffected', 'version': '6.6.148', 'versionType': 'semver', 'lessThanOrEqual': '6.6.*'}, {'status': 'unaffected', 'version': '6.12.101', 'versionType': 'semver', 'lessThanOrEqual': '6.12.*'}, {'status': 'unaffected', 'version': '6.18.42', 'versionType': 'semver', 'lessThanOrEqual': '6.18.*'}, {'status': 'unaffected', 'version': '7.1.6', 'versionType': 'semver', 'lessThanOrEqual': '7.1.*'}, {'status': 'unaffected', 'version': '7.2', 'versionType': 'original_commit_for_fix', 'lessThanOrEqual': '*'}], 'programFiles': ['drivers/gpu/drm/amd/display/dc/link/link_detection.c'], 'defaultStatus': 'affected'}] -
New CVE Received by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Aug. 10, 2026
Action Type Old Value New Value Added Affected [{'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '54618888d1ea7a26f8bccfb89e3c2420350c8047', 'lessThan': 'f9922828a4ebd26286fbe0286cc61695e7d9b07b', 'versionType': 'git'}, {'status': 'affected', 'version': '54618888d1ea7a26f8bccfb89e3c2420350c8047', 'lessThan': 'a59e493567d18ef3858be9368acd132a01ebfa09', 'versionType': 'git'}, {'status': 'affected', 'version': '54618888d1ea7a26f8bccfb89e3c2420350c8047', 'lessThan': '4ee77643e6194f2deb62fe62f04396f9825e27d8', 'versionType': 'git'}, {'status': 'affected', 'version': '54618888d1ea7a26f8bccfb89e3c2420350c8047', 'lessThan': '58ea24dd96848626039296e9e8510270ec8dc4bf', 'versionType': 'git'}, {'status': 'affected', 'version': '54618888d1ea7a26f8bccfb89e3c2420350c8047', 'lessThan': 'a6e14b976be48eebd8769cb5b883a6af7fc5ade1', 'versionType': 'git'}], 'programFiles': ['drivers/gpu/drm/amd/display/dc/link/link_detection.c'], 'defaultStatus': 'unaffected'}, {'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '6.3'}, {'status': 'unaffected', 'version': '0', 'lessThan': '6.3', 'versionType': 'semver'}, {'status': 'unaffected', 'version': '6.6.148', 'versionType': 'semver', 'lessThanOrEqual': '6.6.*'}, {'status': 'unaffected', 'version': '6.12.101', 'versionType': 'semver', 'lessThanOrEqual': '6.12.*'}, {'status': 'unaffected', 'version': '6.18.42', 'versionType': 'semver', 'lessThanOrEqual': '6.18.*'}, {'status': 'unaffected', 'version': '7.1.6', 'versionType': 'semver', 'lessThanOrEqual': '7.1.*'}, {'status': 'unaffected', 'version': '7.2-rc2', 'versionType': 'original_commit_for_fix', 'lessThanOrEqual': '*'}], 'programFiles': ['drivers/gpu/drm/amd/display/dc/link/link_detection.c'], 'defaultStatus': 'affected'}] Added 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) Added Reference https://git.kernel.org/stable/c/4ee77643e6194f2deb62fe62f04396f9825e27d8 Added Reference https://git.kernel.org/stable/c/58ea24dd96848626039296e9e8510270ec8dc4bf Added Reference https://git.kernel.org/stable/c/a59e493567d18ef3858be9368acd132a01ebfa09 Added Reference https://git.kernel.org/stable/c/a6e14b976be48eebd8769cb5b883a6af7fc5ade1 Added Reference https://git.kernel.org/stable/c/f9922828a4ebd26286fbe0286cc61695e7d9b07b