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CVE-2026-89453

Estado: RecibidaSin puntuar—

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.

Leer descripción completaMostrar menos

Drop the PCI device reference after handling the PPR entry.

CVSS

NVD no ha asignado puntuación CVSS a esta CVE (habitual desde el cambio de política de abril de 2026).

Probabilidad de explotación (EPSS)

EPSS (Exploit Prediction Scoring System, de FIRST) estima la probabilidad de que una vulnerabilidad sea explotada en 30 días. Complementa a CVSS (impacto) y a CISA KEV (explotación confirmada).

Tecnologías afectadas (1)

⚠ Inferidas por IA a partir de la descripción — NVD aún no ha analizado esta CVE; no son CPE verificados.

Linux — Linux KernelAI

Referencias

JSON original (NVD)

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{
  "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"
}