iommu: Fix NULL group->domain dereference in pci_dev_reset_iommu_done()

{
  "id": "374473557770830a659e680c27bcfa48be39e93efa7d624a9b302766d6980819",
  "url": "https://osv.dev/vulnerability/CVE-2026-53280",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "iommu: Fix NULL group->domain dereference in pci_dev_reset_iommu_done()",
    "summary": "In the Linux kernel, the following vulnerability has been resolved: iommu: Fix NULL group->domain dereference in pci_dev_reset_iommu_done() Local sashiko review pointed it out that group->domain could be NULL when a default domain fails to allocate during the first probe, which can crash at domain->ops->attach_dev dereference in __iommu_attach_device() invoked by pci_dev_reset_iommu_done(). pci_dev_reset_iommu_prepare() is fine as an old_domain pointer can be NULL. Skip the re-attach in pci_dev_reset_iommu_done() to fix the bug.",
    "evidence": "osv:CVE-2026-53280",
    "products": [
      {
        "name": {
          "value": "Kernel",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "7.0.10",
            "evidence": "/affected/1/ranges"
          }
        ],
        "affected_versions": []
      }
    ],
    "severity": "unknown",
    "structured": {
      "id": "CVE-2026-53280",
      "aliases": [
        "CVE-2026-53280"
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
              "type": "GIT",
              "events": [
                {
                  "introduced": "c279e83953d937470f8a6e69b69f62608714f13f"
                },
                {
                  "fixed": "17194cd0dd236e732d116d50840d795ca50ef196"
                },
                {
                  "fixed": "d769711fcddd005f1e654b3bde547140917fe696"
                }
              ]
            }
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-53280.json"
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "7.0.0"
                },
                {
                  "fixed": "7.0.10"
                }
              ]
            }
          ],
          "package": {
            "name": "Kernel",
            "ecosystem": "Linux"
          },
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-53280.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:48.882841549Z",
      "provider": "osv",
      "references": [
        "https://git.kernel.org/stable/c/17194cd0dd236e732d116d50840d795ca50ef196",
        "https://git.kernel.org/stable/c/d769711fcddd005f1e654b3bde547140917fe696",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/53xxx/CVE-2026-53280.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-53280",
        "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/2026/53xxx/CVE-2026-53280.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-53280",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": null
  },
  "source_id": "core-osv",
  "document_id": 516772,
  "published_at": "2026-06-26T19:40:42.226+00:00"
}