crypto: ccp/sev-dev-tsm - bail out early when pdev->bus is NULL

{
  "id": "7ccea63b50eb4a0a633aade35ed9bdb014e84b1ea57014c32712a435999a9bed",
  "url": "https://osv.dev/vulnerability/CVE-2026-80651",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "crypto: ccp/sev-dev-tsm - bail out early when pdev->bus is NULL",
    "summary": "In the Linux kernel, the following vulnerability has been resolved: crypto: ccp/sev-dev-tsm - bail out early when pdev->bus is NULL dsm_create() initially checks pdev->bus when computing segment_id: u8 segment_id = pdev->bus ? pci_domain_nr(pdev->bus) : 0; But the next two lines unconditionally dereference pdev->bus via pcie_find_root_port() and especially pci_dev_id(pdev), which expands to PCI_DEVID(dev->bus->number, dev->devfn). If pdev->bus is in fact NULL, segment_id is initialised to 0 but the very next statement crashes the kernel. smatch flags this: drivers/crypto/ccp/sev-dev-tsm.c:253 dsm_create() error: we previously assumed 'pdev->bus' could be null (see line 251) Make the NULL handling consistent: if pdev->bus is NULL the device has no PCI context to work with and SEV TIO setup cannot proceed, so return -ENODEV before any of the bus-dependent lookups. The remaining initialisation now runs only on the path where pdev->bus is known to be valid. No change for callers where pdev->bus is non-NULL, which is the only case where dsm_create() did meaningful work before this change.",
    "evidence": "osv:CVE-2026-80651",
    "products": [
      {
        "name": {
          "value": "Kernel",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "7.1.5",
            "evidence": "/affected/1/ranges"
          }
        ],
        "affected_versions": []
      }
    ],
    "severity": "unknown",
    "structured": {
      "id": "CVE-2026-80651",
      "aliases": [
        "CVE-2026-80651"
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
              "type": "GIT",
              "events": [
                {
                  "introduced": "4be423572da1f4c11f45168e3fafda870ddac9f8"
                },
                {
                  "fixed": "6bafd740095fb3d0e9a00540bc8f3484c38e6f85"
                },
                {
                  "fixed": "930d9d36ea618a775985446a125aedeb401db522"
                }
              ]
            }
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-80651.json"
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.19.0"
                },
                {
                  "fixed": "7.1.5"
                }
              ]
            }
          ],
          "package": {
            "name": "Kernel",
            "ecosystem": "Linux"
          },
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-80651.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:26.355617601Z",
      "provider": "osv",
      "references": [
        "https://git.kernel.org/stable/c/6bafd740095fb3d0e9a00540bc8f3484c38e6f85",
        "https://git.kernel.org/stable/c/930d9d36ea618a775985446a125aedeb401db522",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/80xxx/CVE-2026-80651.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-80651",
        "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/2026/80xxx/CVE-2026-80651.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-80651",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": null
  },
  "source_id": "core-osv",
  "document_id": 493051,
  "published_at": "2026-08-28T06:48:59.46+00:00"
}