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CVE-2021-28039

Estado: ModificadaMedia (6.5)—

An issue was discovered in the Linux kernel 5.9.x through 5.11.3, as used with Xen. In some less-common configurations, an x86 PV guest OS user can crash a Dom0 or driver domain via a large amount of I/O activity. The issue relates to misuse of guest physical addresses when a configuration has CONFIG_XEN_UNPOPULATED_ALLOC but not CONFIG_XEN_BALLOON_MEMORY_HOTPLUG.

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 (4)

Linux — Linux KernelNetapp — Cloud BackupNetapp — Solidfire Baseboard Management Controller FirmwareXEN — XEN

CWE

Referencias

JSON original (NVD)

Mostrar
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  "id": "CVE-2021-28039",
  "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,
        "impactScore": 2.9,
        "baseSeverity": "LOW",
        "obtainAllPrivilege": false,
        "exploitabilityScore": 3.9,
        "obtainUserPrivilege": false,
        "obtainOtherPrivilege": false,
        "userInteractionRequired": false
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          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H",
          "integrityImpact": "NONE",
          "userInteraction": "NONE",
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          "privilegesRequired": "LOW",
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  "affected": [
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      "affectedData": [
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  "published": "2021-03-05T18:15:13.190",
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  "vulnStatus": "Modified",
  "weaknesses": [
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          "value": "CWE-131"
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      "value": "An issue was discovered in the Linux kernel 5.9.x through 5.11.3, as used with Xen. In some less-common configurations, an x86 PV guest OS user can crash a Dom0 or driver domain via a large amount of I/O activity. The issue relates to misuse of guest physical addresses when a configuration has CONFIG_XEN_UNPOPULATED_ALLOC but not CONFIG_XEN_BALLOON_MEMORY_HOTPLUG."
    },
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      "value": "Se detectó un problema en el kernel de Linux versiones 5.9.x hasta 5.11.3, como es usada con Xen. En algunas configuraciones menos comunes, un usuario de Sistema Operativo invitado PV x86 puede bloquear un dominio de controlador o Dom0 por medio de una gran cantidad de actividad de I/O. El problema se relaciona con el uso indebido de las direcciones físicas de invitados cuando una configuración presenta CONFIG_XEN_UNPOPULATED_ALLOC pero no CONFIG_XEN_BALLOON_MEMORY_HOTPLUG"
    }
  ],
  "lastModified": "2026-06-17T03:45:45.847",
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