Vulnerability-Lookup

GHSA-3RG2-HC7Q-MW7H

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: Fix ISM dc_lock deadlock during suspend

[Why] System hang observed during suspend/resume while video is playing. amdgpu_dm_ism_disable() is called under dc_lock and waits for ISM delayed work via disable_delayed_work_sync(). The work handlers themselves take dc_lock, producing an ABBA deadlock when a worker is in flight at suspend time.

[How] Split the disable path into two phases with opposite locking contracts: 1. amdgpu_dm_ism_disable() -- quiesces workers, must NOT hold dc_lock. 2. amdgpu_dm_ism_force_full_power() (new) -- drives the ISM FSM back to FULL_POWER_RUNNING, must hold dc_lock.

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{
  "affected": [],
  "aliases": [
    "CVE-2026-68364"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-08-10T13:20:29Z",
    "severity": null
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/amd/display: Fix ISM dc_lock deadlock during suspend\n\n[Why]\nSystem hang observed during suspend/resume while video is playing.\namdgpu_dm_ism_disable() is called under dc_lock and waits for ISM\ndelayed work via disable_delayed_work_sync(). The work handlers\nthemselves take dc_lock, producing an ABBA deadlock when a worker is\nin flight at suspend time.\n\n[How]\nSplit the disable path into two phases with opposite locking\ncontracts:\n  1. amdgpu_dm_ism_disable() -- quiesces workers, must NOT hold\n     dc_lock.\n  2. amdgpu_dm_ism_force_full_power() (new) -- drives the ISM FSM\n     back to FULL_POWER_RUNNING, must hold dc_lock.",
  "id": "GHSA-3rg2-hc7q-mw7h",
  "modified": "2026-08-10T15:33:48Z",
  "published": "2026-08-10T15:33:48Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-68364"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/3714fe242592e3699ac5e2c19d68b275a210be7d"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/95776812e6b8f908563e8994d5d947b68baf68a6"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}

CVE-2026-68364 (GCVE-0-2026-68364)

Vulnerability from cvelistv5 – Published: 2026-08-10 12:03 – Updated: 2026-08-18 06:55

Title

drm/amd/display: Fix ISM dc_lock deadlock during suspend

Summary

In the Linux kernel, the following vulnerability has been resolved: drm/amd/display: Fix ISM dc_lock deadlock during suspend [Why] System hang observed during suspend/resume while video is playing. amdgpu_dm_ism_disable() is called under dc_lock and waits for ISM delayed work via disable_delayed_work_sync(). The work handlers themselves take dc_lock, producing an ABBA deadlock when a worker is in flight at suspend time. [How] Split the disable path into two phases with opposite locking contracts: 1. amdgpu_dm_ism_disable() -- quiesces workers, must NOT hold dc_lock. 2. amdgpu_dm_ism_force_full_power() (new) -- drives the ISM FSM back to FULL_POWER_RUNNING, must hold dc_lock.

Severity

No CVSS data available.

Assigner

Linux mitre root

References

2 references

URL	Tags
https://git.kernel.org/stable/c/95776812e6b8f9085…
https://git.kernel.org/stable/c/3714fe242592e3699…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: 754003486c3cc95f2fcb9d6b71a779047d6db95c , < 95776812e6b8f908563e8994d5d947b68baf68a6 (git) Affected: 754003486c3cc95f2fcb9d6b71a779047d6db95c , < 3714fe242592e3699ac5e2c19d68b275a210be7d (git)
Linux	Linux	Affected: 7.1 Unaffected: 0 , < 7.1 (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/amdgpu_dm/amdgpu_dm.c",
            "drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_ism.c",
            "drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_ism.h"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "95776812e6b8f908563e8994d5d947b68baf68a6",
              "status": "affected",
              "version": "754003486c3cc95f2fcb9d6b71a779047d6db95c",
              "versionType": "git"
            },
            {
              "lessThan": "3714fe242592e3699ac5e2c19d68b275a210be7d",
              "status": "affected",
              "version": "754003486c3cc95f2fcb9d6b71a779047d6db95c",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c",
            "drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_ism.c",
            "drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_ism.h"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "7.1"
            },
            {
              "lessThan": "7.1",
              "status": "unaffected",
              "version": "0",
              "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": "7.1.6",
                  "versionStartIncluding": "7.1",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.2",
                  "versionStartIncluding": "7.1",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/amd/display: Fix ISM dc_lock deadlock during suspend\n\n[Why]\nSystem hang observed during suspend/resume while video is playing.\namdgpu_dm_ism_disable() is called under dc_lock and waits for ISM\ndelayed work via disable_delayed_work_sync(). The work handlers\nthemselves take dc_lock, producing an ABBA deadlock when a worker is\nin flight at suspend time.\n\n[How]\nSplit the disable path into two phases with opposite locking\ncontracts:\n  1. amdgpu_dm_ism_disable() -- quiesces workers, must NOT hold\n     dc_lock.\n  2. amdgpu_dm_ism_force_full_power() (new) -- drives the ISM FSM\n     back to FULL_POWER_RUNNING, must hold dc_lock."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-18T06:55:58.239Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/95776812e6b8f908563e8994d5d947b68baf68a6"
        },
        {
          "url": "https://git.kernel.org/stable/c/3714fe242592e3699ac5e2c19d68b275a210be7d"
        }
      ],
      "title": "drm/amd/display: Fix ISM dc_lock deadlock during suspend",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-68364",
    "datePublished": "2026-08-10T12:03:41.385Z",
    "dateReserved": "2026-07-30T09:28:09.385Z",
    "dateUpdated": "2026-08-18T06:55:58.239Z",
    "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.

Action not permitted

GHSA-3RG2-HC7Q-MW7H

CVE-2026-68364 (GCVE-0-2026-68364)

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Sightings

Nomenclature