Vulnerability-Lookup

GHSA-PVVR-9J3M-HVHG

Vulnerability from github – Published: 2026-08-10 15:33 – Updated: 2026-08-10 15:33

Details

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)

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{
  "affected": [],
  "aliases": [
    "CVE-2026-68256"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-08-10T13:20:14Z",
    "severity": null
  },
  "details": "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)",
  "id": "GHSA-pvvr-9j3m-hvhg",
  "modified": "2026-08-10T15:33:43Z",
  "published": "2026-08-10T15:33:43Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-68256"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/4ee77643e6194f2deb62fe62f04396f9825e27d8"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/58ea24dd96848626039296e9e8510270ec8dc4bf"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/a59e493567d18ef3858be9368acd132a01ebfa09"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/a6e14b976be48eebd8769cb5b883a6af7fc5ade1"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/f9922828a4ebd26286fbe0286cc61695e7d9b07b"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}

CVE-2026-68256 (GCVE-0-2026-68256)

Vulnerability from cvelistv5 – Published: 2026-08-10 12:01 – Updated: 2026-08-17 05:01

Title

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

Summary

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)

Severity

No CVSS data available.

Assigner

Linux mitre root

References

5 references

URL	Tags
https://git.kernel.org/stable/c/f9922828a4ebd2628…
https://git.kernel.org/stable/c/a59e493567d18ef38…
https://git.kernel.org/stable/c/4ee77643e6194f2de…
https://git.kernel.org/stable/c/58ea24dd968486260…
https://git.kernel.org/stable/c/a6e14b976be48eebd…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: 54618888d1ea7a26f8bccfb89e3c2420350c8047 , < f9922828a4ebd26286fbe0286cc61695e7d9b07b (git) Affected: 54618888d1ea7a26f8bccfb89e3c2420350c8047 , < a59e493567d18ef3858be9368acd132a01ebfa09 (git) Affected: 54618888d1ea7a26f8bccfb89e3c2420350c8047 , < 4ee77643e6194f2deb62fe62f04396f9825e27d8 (git) Affected: 54618888d1ea7a26f8bccfb89e3c2420350c8047 , < 58ea24dd96848626039296e9e8510270ec8dc4bf (git) Affected: 54618888d1ea7a26f8bccfb89e3c2420350c8047 , < a6e14b976be48eebd8769cb5b883a6af7fc5ade1 (git)
Linux	Linux	Affected: 6.3 Unaffected: 0 , < 6.3 (semver) Unaffected: 6.6.148 , ≤ 6.6.* (semver) Unaffected: 6.12.101 , ≤ 6.12.* (semver) Unaffected: 6.18.42 , ≤ 6.18.* (semver) Unaffected: 7.1.6 , ≤ 7.1.* (semver) Unaffected: 7.2 , ≤ * (original_commit_for_fix)

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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/gpu/drm/amd/display/dc/link/link_detection.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "f9922828a4ebd26286fbe0286cc61695e7d9b07b",
              "status": "affected",
              "version": "54618888d1ea7a26f8bccfb89e3c2420350c8047",
              "versionType": "git"
            },
            {
              "lessThan": "a59e493567d18ef3858be9368acd132a01ebfa09",
              "status": "affected",
              "version": "54618888d1ea7a26f8bccfb89e3c2420350c8047",
              "versionType": "git"
            },
            {
              "lessThan": "4ee77643e6194f2deb62fe62f04396f9825e27d8",
              "status": "affected",
              "version": "54618888d1ea7a26f8bccfb89e3c2420350c8047",
              "versionType": "git"
            },
            {
              "lessThan": "58ea24dd96848626039296e9e8510270ec8dc4bf",
              "status": "affected",
              "version": "54618888d1ea7a26f8bccfb89e3c2420350c8047",
              "versionType": "git"
            },
            {
              "lessThan": "a6e14b976be48eebd8769cb5b883a6af7fc5ade1",
              "status": "affected",
              "version": "54618888d1ea7a26f8bccfb89e3c2420350c8047",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/gpu/drm/amd/display/dc/link/link_detection.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.3"
            },
            {
              "lessThan": "6.3",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.148",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.101",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.42",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.1.*",
              "status": "unaffected",
              "version": "7.1.6",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.2",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.6.148",
                  "versionStartIncluding": "6.3",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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                  "versionStartIncluding": "6.3",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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                },
                {
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                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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                }
              ],
              "negate": false,
              "operator": "OR"
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      ],
      "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)"
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-17T05:01:47.968Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/f9922828a4ebd26286fbe0286cc61695e7d9b07b"
        },
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          "url": "https://git.kernel.org/stable/c/a59e493567d18ef3858be9368acd132a01ebfa09"
        },
        {
          "url": "https://git.kernel.org/stable/c/4ee77643e6194f2deb62fe62f04396f9825e27d8"
        },
        {
          "url": "https://git.kernel.org/stable/c/58ea24dd96848626039296e9e8510270ec8dc4bf"
        },
        {
          "url": "https://git.kernel.org/stable/c/a6e14b976be48eebd8769cb5b883a6af7fc5ade1"
        }
      ],
      "title": "drm/amd/display: detect_link_and_local_sink: DP alt mode timeout path leaks prev_sink reference",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-68256",
    "datePublished": "2026-08-10T12:01:26.406Z",
    "dateReserved": "2026-07-30T09:28:09.378Z",
    "dateUpdated": "2026-08-17T05:01:47.968Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.

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GHSA-PVVR-9J3M-HVHG

CVE-2026-68256 (GCVE-0-2026-68256)

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Sightings

Nomenclature