« Back to list

CVE-2026-89453

Status: ReceivedUnscored—

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.

Read full descriptionShow less

Drop the PCI device reference after handling the PPR entry.

CVSS

NVD hasn't assigned a CVSS score to this CVE (common since the April 2026 policy change).

Exploitation probability (EPSS)

EPSS (Exploit Prediction Scoring System, FIRST) estimates how likely a vulnerability is to be exploited in the wild within 30 days. It complements CVSS (impact) and CISA KEV (confirmed exploitation).

Affected technologies (1)

⚠ AI-inferred from the description — NVD hasn't analyzed this CVE yet, these aren't verified CPEs.

Linux — Linux KernelAI

References

Raw JSON (NVD)

Show
{
  "id": "CVE-2026-89453",
  "cveTags": [],
  "metrics": {},
  "affected": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "affectedData": [
        {
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "product": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "978d626b8f1a239acc635323d731c77eae54eb61",
              "lessThan": "1de4443f85e4405af00153cdf8ba73ff12a65036",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "978d626b8f1a239acc635323d731c77eae54eb61",
              "lessThan": "cfc5c1b2caa176dfd40b873a6ff07b11da34cc3e",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "978d626b8f1a239acc635323d731c77eae54eb61",
              "lessThan": "d1470e16c1977e6c94fadf6048deafaa4d150fec",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "978d626b8f1a239acc635323d731c77eae54eb61",
              "lessThan": "af3b69b16383fbc8fe5f61b5b0150d2e41ede71f",
              "versionType": "git"
            }
          ],
          "programFiles": [
            "drivers/iommu/amd/ppr.c"
          ],
          "defaultStatus": "unaffected"
        },
        {
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "product": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.10"
            },
            {
              "status": "unaffected",
              "version": "0",
              "lessThan": "6.10",
              "versionType": "semver"
            },
            {
              "status": "unaffected",
              "version": "6.12.109",
              "versionType": "semver",
              "lessThanOrEqual": "6.12.*"
            },
            {
              "status": "unaffected",
              "version": "6.18.50",
              "versionType": "semver",
              "lessThanOrEqual": "6.18.*"
            },
            {
              "status": "unaffected",
              "version": "7.2.4",
              "versionType": "semver",
              "lessThanOrEqual": "7.2.*"
            },
            {
              "status": "unaffected",
              "version": "7.3-rc1",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ],
          "programFiles": [
            "drivers/iommu/amd/ppr.c"
          ],
          "defaultStatus": "affected"
        }
      ]
    }
  ],
  "published": "2026-09-11T20:19:25.967",
  "references": [
    {
      "url": "https://git.kernel.org/stable/c/1de4443f85e4405af00153cdf8ba73ff12a65036",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/af3b69b16383fbc8fe5f61b5b0150d2e41ede71f",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/cfc5c1b2caa176dfd40b873a6ff07b11da34cc3e",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/d1470e16c1977e6c94fadf6048deafaa4d150fec",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "vulnStatus": "Received",
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\niommu/amd: Put PCI device after handling PPR faults\n\niommu_call_iopf_notifier() looks up the requester with\npci_get_domain_bus_and_slot(), which returns a PCI device with its\nreference count incremented.\n\nNeither the successful iommu_report_device_fault() path nor the abort\npath drops that reference, so every handled PPR request leaks a PCI\ndevice reference.\n\nThis is the same ownership rule that was fixed for the old iommu_v2\nppr_notifier() path by commit 6cf0981c2233 (\"iommu/amd: Fix pci device\nrefcount leak in ppr_notifier()\"), but iommu_call_iopf_notifier() was\nadded later as a separate PPR/IOPF notifier path.\n\nDrop the PCI device reference after handling the PPR entry."
    }
  ],
  "lastModified": "2026-09-11T20:19:25.967",
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}