drm/amdgpu/userq: only accept doorbell BOs as queue doorbell

{
  "id": "d2ac3e2c942ee09eedb916177d774e5ae81c7bab5409e453722029841a040c49",
  "url": "https://osv.dev/vulnerability/CVE-2026-98997",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "drm/amdgpu/userq: only accept doorbell BOs as queue doorbell",
    "summary": "In the Linux kernel, the following vulnerability has been resolved: drm/amdgpu/userq: only accept doorbell BOs as queue doorbell amdgpu_userq_get_doorbell_index() pins any BO passed as doorbell_handle into the doorbell domain. For a regular BO, TTM moves it with ttm_bo_move_null() and its contents are lost. Since an importer on the same device gets the exporter's GEM object, a client can do this to a buffer another client shared with it. Reject BOs that were not created in the doorbell domain. v2: drop the error message, use a local abo variable (Christian) (cherry picked from commit f7497bbc19db4821c62b9d97b31c9086feb2d917)",
    "evidence": "osv:CVE-2026-98997",
    "products": [
      {
        "name": {
          "value": "Kernel",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "6.18.57",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "7.2.11",
            "evidence": "/affected/1/ranges"
          }
        ],
        "affected_versions": []
      }
    ],
    "severity": "unknown",
    "structured": {
      "id": "CVE-2026-98997",
      "aliases": [
        "CVE-2026-98997"
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
              "type": "GIT",
              "events": [
                {
                  "introduced": "f09c1e6077abd1bc2ddd2b97e1135215801ca7f9"
                },
                {
                  "fixed": "112dbe2b10d6d088a6c599980dd960dcbfa55ff0"
                },
                {
                  "fixed": "8640b3f961d743d6dc0458c2b53a3af434690cc1"
                },
                {
                  "fixed": "7f7c88dbf4d543f6703e53bdeed380e886733167"
                }
              ]
            }
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-98997.json"
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.16.0"
                },
                {
                  "fixed": "6.18.57"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.19.0"
                },
                {
                  "fixed": "7.2.11"
                }
              ]
            }
          ],
          "package": {
            "name": "Kernel",
            "ecosystem": "Linux"
          },
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-98997.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:46.294435826Z",
      "provider": "osv",
      "references": [
        "https://git.kernel.org/stable/c/112dbe2b10d6d088a6c599980dd960dcbfa55ff0",
        "https://git.kernel.org/stable/c/7f7c88dbf4d543f6703e53bdeed380e886733167",
        "https://git.kernel.org/stable/c/8640b3f961d743d6dc0458c2b53a3af434690cc1",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/98xxx/CVE-2026-98997.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-98997",
        "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/2026/98xxx/CVE-2026-98997.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-98997",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": null
  },
  "source_id": "core-osv",
  "document_id": 514405,
  "published_at": "2026-10-23T12:20:16.267+00:00"
}