FKIE_CVE-2026-68364

Vulnerability from fkie_nvd - Published: 2026-08-10 13:20 - Updated: 2026-08-18 07:16
Severity
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.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/3714fe242592e3699ac5e2c19d68b275a210be7d
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/95776812e6b8f908563e8994d5d947b68baf68a6
Impacted products
Vendor Product Version
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "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"
            }
          ]
        }
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "cveTags": [],
  "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."
    }
  ],
  "id": "CVE-2026-68364",
  "lastModified": "2026-08-18T07:16:51.693",
  "metrics": {},
  "published": "2026-08-10T13:20:29.010",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/3714fe242592e3699ac5e2c19d68b275a210be7d"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/95776812e6b8f908563e8994d5d947b68baf68a6"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Received"
}



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