thunderbolt: Make the DP tunnel activation callback mandatory

{
  "id": "6a6ac1f481546555a714ea5cbac3d8e14e1fcf6c57e232b16b35eb10a79d4b8d",
  "url": "https://osv.dev/vulnerability/CVE-2026-98692",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "thunderbolt: Make the DP tunnel activation callback mandatory",
    "summary": "In the Linux kernel, the following vulnerability has been resolved: thunderbolt: Make the DP tunnel activation callback mandatory tb_tunnel_alloc_dp() takes an optional callback which is run from dprx_work once the DPRX capabilities read has completed. Without that callback tb_dp_dprx_start() reads the capabilities synchronously and never queues the work. It however always takes a tunnel reference which is only dropped by dprx_work itself or by tb_dp_dprx_stop() when cancel_delayed_work() actually canceled that work. That reference is thus leaked for every tunnel without a callback. The only tunnels without one are those from tb_tunnel_discover_dp(), which are activated again when restoring from hibernation. Pass the callback to tb_tunnel_discover_dp() as well and drop the synchronous path such that the DPRX capabilities are always read from dprx_work. Hibernation restore then also no longer blocks for up to 12 seconds while waiting for that read to complete. Also fix up the KUnit tests.",
    "evidence": "osv:CVE-2026-98692",
    "products": [
      {
        "name": {
          "value": "Kernel",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "7.2.10",
            "evidence": "/affected/1/ranges"
          }
        ],
        "affected_versions": []
      }
    ],
    "severity": "unknown",
    "structured": {
      "id": "CVE-2026-98692",
      "aliases": [
        "CVE-2026-98692"
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
              "type": "GIT",
              "events": [
                {
                  "introduced": "d6d458d42e1e1544a18f37f1d5c840e00d5261b9"
                },
                {
                  "fixed": "47d60ea801fc333a10c576691eca2e7840b02d3d"
                },
                {
                  "fixed": "12f5d8b85a66a0ac08d082517d92ce136f8c0d42"
                }
              ]
            }
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-98692.json"
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.14.0"
                },
                {
                  "fixed": "7.2.10"
                }
              ]
            }
          ],
          "package": {
            "name": "Kernel",
            "ecosystem": "Linux"
          },
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-98692.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:35.819911309Z",
      "provider": "osv",
      "references": [
        "https://git.kernel.org/stable/c/12f5d8b85a66a0ac08d082517d92ce136f8c0d42",
        "https://git.kernel.org/stable/c/47d60ea801fc333a10c576691eca2e7840b02d3d",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/98xxx/CVE-2026-98692.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-98692",
        "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-2026-98692.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-98692",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": null
  },
  "source_id": "core-osv",
  "document_id": 503412,
  "published_at": "2026-10-18T15:46:16.794+00:00"
}