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)

CVSS

No CVSS.

References

Link	Resource
https://git.kernel.org/stable/c/4ee77643e6194f2deb62fe62f04396f9825e27d8
https://git.kernel.org/stable/c/58ea24dd96848626039296e9e8510270ec8dc4bf
https://git.kernel.org/stable/c/a59e493567d18ef3858be9368acd132a01ebfa09
https://git.kernel.org/stable/c/a6e14b976be48eebd8769cb5b883a6af7fc5ade1
https://git.kernel.org/stable/c/f9922828a4ebd26286fbe0286cc61695e7d9b07b

Configurations

No configuration.

History

No history.

Information

Published : 2026-08-10 13:20

Updated : 2026-08-17 05:18

NVD link : CVE-2026-68256

Mitre link : CVE-2026-68256

CVE.ORG link : CVE-2026-68256

JSON object : View

Products Affected

No product.

CWE

No CWE.

{"id": "CVE-2026-68256", "cveTags": [], "metrics": {}, "affected": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "affectedData": [{"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"}]}], "published": "2026-08-10T13:20:14.250", "references": [{"url": "https://git.kernel.org/stable/c/4ee77643e6194f2deb62fe62f04396f9825e27d8", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/58ea24dd96848626039296e9e8510270ec8dc4bf", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/a59e493567d18ef3858be9368acd132a01ebfa09", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/a6e14b976be48eebd8769cb5b883a6af7fc5ade1", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/f9922828a4ebd26286fbe0286cc61695e7d9b07b", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "vulnStatus": "Received", "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/amd/display: detect_link_and_local_sink: DP alt mode timeout path leaks prev_sink reference\n\nprev_sink is unconditionally retained via dc_sink_retain at function\n entry, but the DP alt mode timeout path inside SIGNAL_TYPE_DISPLAY_PORT\n returns false without releasing prev_sink. All other return paths in the\n function correctly call dc_sink_release(prev_sink), making this the only\n missing cleanup.\n\n(cherry picked from commit 45510cf662dcf46b5d8926d454f338809f107b9d)"}], "lastModified": "2026-08-17T05:18:27.913", "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}