iommu/amd: Put PCI device after handling PPR faults

{
  "id": "3a717f6be4555c3ccf41b0b6cf4f15c7a116a8ac4121f36c938ff34f125ce5f0",
  "url": "https://osv.dev/vulnerability/CVE-2026-89453",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "iommu/amd: Put PCI device after handling PPR faults",
    "summary": "In the Linux kernel, the following vulnerability has been resolved: iommu/amd: Put PCI device after handling PPR faults iommu_call_iopf_notifier() looks up the requester with pci_get_domain_bus_and_slot(), which returns a PCI device with its reference count incremented. Neither the successful iommu_report_device_fault() path nor the abort path drops that reference, so every handled PPR request leaks a PCI device reference. This is the same ownership rule that was fixed for the old iommu_v2 ppr_notifier() path by commit 6cf0981c2233 (\"iommu/amd: Fix pci device refcount leak in ppr_notifier()\"), but iommu_call_iopf_notifier() was added later as a separate PPR/IOPF notifier path. Drop the PCI device reference after handling the PPR entry.",
    "evidence": "osv:CVE-2026-89453",
    "products": [
      {
        "name": {
          "value": "Kernel",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "6.12.109",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.18.50",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "7.2.4",
            "evidence": "/affected/1/ranges"
          }
        ],
        "affected_versions": []
      }
    ],
    "severity": "unknown",
    "structured": {
      "id": "CVE-2026-89453",
      "aliases": [
        "CVE-2026-89453"
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
              "type": "GIT",
              "events": [
                {
                  "introduced": "978d626b8f1a239acc635323d731c77eae54eb61"
                },
                {
                  "fixed": "1de4443f85e4405af00153cdf8ba73ff12a65036"
                },
                {
                  "fixed": "cfc5c1b2caa176dfd40b873a6ff07b11da34cc3e"
                },
                {
                  "fixed": "d1470e16c1977e6c94fadf6048deafaa4d150fec"
                },
                {
                  "fixed": "af3b69b16383fbc8fe5f61b5b0150d2e41ede71f"
                }
              ]
            }
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-89453.json"
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.10.0"
                },
                {
                  "fixed": "6.12.109"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.13.0"
                },
                {
                  "fixed": "6.18.50"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.19.0"
                },
                {
                  "fixed": "7.2.4"
                }
              ]
            }
          ],
          "package": {
            "name": "Kernel",
            "ecosystem": "Linux"
          },
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-89453.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:46.015441579Z",
      "provider": "osv",
      "references": [
        "https://git.kernel.org/stable/c/1de4443f85e4405af00153cdf8ba73ff12a65036",
        "https://git.kernel.org/stable/c/af3b69b16383fbc8fe5f61b5b0150d2e41ede71f",
        "https://git.kernel.org/stable/c/cfc5c1b2caa176dfd40b873a6ff07b11da34cc3e",
        "https://git.kernel.org/stable/c/d1470e16c1977e6c94fadf6048deafaa4d150fec",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/89xxx/CVE-2026-89453.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-89453",
        "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/2026/89xxx/CVE-2026-89453.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-89453",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": null
  },
  "source_id": "core-osv",
  "document_id": 514316,
  "published_at": "2026-09-11T19:43:18.068+00:00"
}