drm/amdgpu/userq: fix indefinite fence wait during GPU reset

{
  "id": "457bc97eec9706b3164a6f73347995555c6abf416bdbc6273e7f0084d8665b43",
  "url": "https://osv.dev/vulnerability/CVE-2026-68237",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "drm/amdgpu/userq: fix indefinite fence wait during GPU reset",
    "summary": "In the Linux kernel, the following vulnerability has been resolved: drm/amdgpu/userq: fix indefinite fence wait during GPU reset pre_reset only force-completes fences of MAPPED queues. A queue in any other state (e.g. mid-eviction) keeps its last_fence pending; after a GPU reset that fence never signals, so the eviction/suspend worker and process teardown (amdgpu_evf_mgr_flush_suspend) wait on it forever and wedge the machine: INFO: task kworker/6:28 blocked for more than 120 seconds. Workqueue: events amdgpu_eviction_fence_suspend_worker [amdgpu] Call Trace: dma_fence_wait_timeout+0x7e/0x130 amdgpu_userq_evict+0x67/0x140 [amdgpu] amdgpu_eviction_fence_suspend_worker+0xd8/0x160 [amdgpu] process_scheduled_works+0xa6/0x420 Force-complete every queue's fence regardless of state. The unmap and mark-hung step stays gated on MAPPED, since unmapping a queue that is not mapped is invalid. (cherry picked from commit 9102b39fa924dcc3dc75a3137bfa9633c40b88c0)",
    "evidence": "osv:CVE-2026-68237",
    "products": [
      {
        "name": {
          "value": "Kernel",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "7.1.6",
            "evidence": "/affected/1/ranges"
          }
        ],
        "affected_versions": []
      }
    ],
    "severity": "unknown",
    "structured": {
      "id": "CVE-2026-68237",
      "aliases": [
        "CVE-2026-68237"
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
              "type": "GIT",
              "events": [
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                  "introduced": "290f46cf5726509f55fac4c7abe9b9d311aa5a3a"
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                {
                  "fixed": "3085ae8695e025b39d208f288c6265edc75abbe8"
                },
                {
                  "fixed": "5d75ec2e5f1736c2f10c7d6f4565bf1bf29f29a7"
                }
              ]
            }
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-68237.json"
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.19.0"
                },
                {
                  "fixed": "7.1.6"
                }
              ]
            }
          ],
          "package": {
            "name": "Kernel",
            "ecosystem": "Linux"
          },
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-68237.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:49.176585916Z",
      "provider": "osv",
      "references": [
        "https://git.kernel.org/stable/c/3085ae8695e025b39d208f288c6265edc75abbe8",
        "https://git.kernel.org/stable/c/5d75ec2e5f1736c2f10c7d6f4565bf1bf29f29a7",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/68xxx/CVE-2026-68237.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-68237",
        "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
      ],
      "provider_metadata": {
        "cna_assigner": "Linux",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/68xxx/CVE-2026-68237.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-68237",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": null
  },
  "source_id": "core-osv",
  "document_id": 517620,
  "published_at": "2026-08-10T12:01:02.144+00:00"
}