CVE-2026-89820 (GCVE-0-2026-89820)

Vulnerability from cvelistv5 – Published: 2026-09-16 10:30 – Updated: 2026-09-16 10:30
VLAI
Title
drm/amd/display: fix dc_lock leak on GPU reset error paths
Summary
In the Linux kernel, the following vulnerability has been resolved: drm/amd/display: fix dc_lock leak on GPU reset error paths On GPU reset, dm_suspend() takes dc_lock and leaves it for dm_resume() to drop. If amdgpu_dm_commit_zero_streams() or dm_dmub_hw_init() fails, the function returns with the lock still held. The matching resume path is then skipped, so every later dc_lock take hangs. Release the cached DC state and unlock before returning the error.
Severity
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 3cf7a0bc87f028b6bc63a43a80d9d6026ae4d85f , < 295d2bf42061db490254e748f9344545bb7faf19 (git)
Affected: 3cf7a0bc87f028b6bc63a43a80d9d6026ae4d85f , < dac29cbb405b912742f4f7eda833cec8e7a53780 (git)
Affected: 3cf7a0bc87f028b6bc63a43a80d9d6026ae4d85f , < 92a9eebd2a1f892fe482154d83f9f1626bc73d3b (git)
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Linux Linux Affected: 6.15
Unaffected: 0 , < 6.15 (semver)
Unaffected: 6.18.51 , ≤ 6.18.* (semver)
Unaffected: 7.2.5 , ≤ 7.2.* (semver)
Unaffected: 7.3-rc1 , ≤ * (original_commit_for_fix)
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{
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          "programFiles": [
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              "operator": "OR"
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        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/amd/display: fix dc_lock leak on GPU reset error paths\n\nOn GPU reset, dm_suspend() takes dc_lock and leaves it for dm_resume()\nto drop. If amdgpu_dm_commit_zero_streams() or dm_dmub_hw_init() fails,\nthe function returns with the lock still held. The matching resume path\nis then skipped, so every later dc_lock take hangs.\n\nRelease the cached DC state and unlock before returning the error."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-09-16T10:30:52.803Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
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        },
        {
          "url": "https://git.kernel.org/stable/c/92a9eebd2a1f892fe482154d83f9f1626bc73d3b"
        }
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      "title": "drm/amd/display: fix dc_lock leak on GPU reset error paths",
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    "datePublished": "2026-09-16T10:30:52.803Z",
    "dateReserved": "2026-09-11T19:38:34.768Z",
    "dateUpdated": "2026-09-16T10:30:52.803Z",
    "state": "PUBLISHED"
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          {
            "lang": "en",
            "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/amd/display: fix dc_lock leak on GPU reset error paths\n\nOn GPU reset, dm_suspend() takes dc_lock and leaves it for dm_resume()\nto drop. If amdgpu_dm_commit_zero_streams() or dm_dmub_hw_init() fails,\nthe function returns with the lock still held. The matching resume path\nis then skipped, so every later dc_lock take hangs.\n\nRelease the cached DC state and unlock before returning the error."
          }
        ],
        "id": "CVE-2026-89820",
        "lastModified": "2026-09-16T11:16:47.383",
        "metrics": {},
        "published": "2026-09-16T11:16:47.383",
        "references": [
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "url": "https://git.kernel.org/stable/c/295d2bf42061db490254e748f9344545bb7faf19"
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      "current_release_date": "2026-09-23T14:09:45+00:00",
      "cve": "CVE-2026-89820",
      "id": "CVE-2026-89820",
      "initial_release_date": "2026-09-16T00:00:00+00:00",
      "product_status:known_affected": "199",
      "product_status:known_not_affected": "77",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: drm/amd/display: fix dc_lock leak on GPU reset error paths",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-89820.json",
      "version": "3"
    }
  }
}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

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  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



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