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CVE-2021-3638

Estado: ModificadaMedia (6.5)—

An out-of-bounds memory access flaw was found in the ATI VGA device emulation of QEMU. This flaw occurs in the ati_2d_blt() routine while handling MMIO write operations when the guest provides invalid values for the destination display parameters. A malicious guest could use this flaw to crash the QEMU process on the host, resulting in a denial of service.

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 — FedoraQemu — Qemu

CWE

Referencias

JSON original (NVD)

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  "id": "CVE-2021-3638",
  "cveTags": [],
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          "accessVector": "LOCAL",
          "vectorString": "AV:L/AC:L/Au:N/C:N/I:N/A:P",
          "authentication": "NONE",
          "integrityImpact": "NONE",
          "accessComplexity": "LOW",
          "availabilityImpact": "PARTIAL",
          "confidentialityImpact": "NONE"
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        "acInsufInfo": false,
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  ],
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    {
      "lang": "en",
      "value": "An out-of-bounds memory access flaw was found in the ATI VGA device emulation of QEMU. This flaw occurs in the ati_2d_blt() routine while handling MMIO write operations when the guest provides invalid values for the destination display parameters. A malicious guest could use this flaw to crash the QEMU process on the host, resulting in a denial of service."
    },
    {
      "lang": "es",
      "value": "Se ha encontrado un fallo de acceso a memoria fuera de límites en la emulación de dispositivos ATI VGA de QEMU. Este fallo es producido en la rutina ati_2d_blt() mientras son manejadas operaciones de escritura MMIO cuando el huésped proporciona valores no válidos para los parámetros de pantalla de destino. Un huésped malicioso podría usar este fallo para bloquear el proceso QEMU en el host, resultando en una denegación de servicio"
    }
  ],
  "lastModified": "2026-06-17T04:05:29.190",
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