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CVE-2023-46839

Estado: AnalizadaMedia (5.3)—

PCI devices can make use of a functionality called phantom functions, that when enabled allows the device to generate requests using the IDs of functions that are otherwise unpopulated. This allows a device to extend the number of outstanding requests.

Such phantom functions need an IOMMU context setup, but failure to setup the context is not fatal when the device is assigned. Not failing device assignment when such failure happens can lead to the primary device being assigned to a guest, while some of the phantom functions are assigned to a different domain.

CVSS

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 (2)

Fedoraproject — FedoraXEN — XEN

CWE

Referencias

JSON original (NVD)

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          "options": [
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              "exploitation": "none"
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              "automatable": "no"
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          "version": "2.0.3",
          "timestamp": "2024-08-06T14:00:00.793454Z"
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          "integrityImpact": "NONE",
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  "published": "2024-03-20T11:15:08.120",
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      "value": "PCI devices can make use of a functionality called phantom functions,\nthat when enabled allows the device to generate requests using the IDs\nof functions that are otherwise unpopulated.  This allows a device to\nextend the number of outstanding requests.\n\nSuch phantom functions need an IOMMU context setup, but failure to\nsetup the context is not fatal when the device is assigned.  Not\nfailing device assignment when such failure happens can lead to the\nprimary device being assigned to a guest, while some of the phantom\nfunctions are assigned to a different domain.\n"
    },
    {
      "lang": "es",
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    }
  ],
  "lastModified": "2026-06-17T06:31:44.083",
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