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CVE-2020-25637

Estado: ModificadaMedia (6.7)—

A double free memory issue was found to occur in the libvirt API, in versions before 6.8.0, responsible for requesting information about network interfaces of a running QEMU domain. This flaw affects the polkit access control driver. Specifically, clients connecting to the read-write socket with limited ACL permissions could use this flaw to crash the libvirt daemon, resulting in a denial of service, or potentially escalate their privileges on the system. The highest threat from this vulnerability is to data confidentiality and integrity as well as system availability.

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)

Opensuse — LeapRedhat — Libvirt

CWE

Referencias

JSON original (NVD)

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  "id": "CVE-2020-25637",
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          "accessVector": "LOCAL",
          "vectorString": "AV:L/AC:L/Au:N/C:C/I:C/A:C",
          "authentication": "NONE",
          "integrityImpact": "COMPLETE",
          "accessComplexity": "LOW",
          "availabilityImpact": "COMPLETE",
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  "affected": [
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      "affectedData": [
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          "product": "libvirt",
          "versions": [
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  "published": "2020-10-06T14:15:12.527",
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  "vulnStatus": "Modified",
  "weaknesses": [
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      "type": "Secondary",
      "source": "secalert@redhat.com",
      "description": [
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          "value": "CWE-415"
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    {
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      "value": "A double free memory issue was found to occur in the libvirt API, in versions before 6.8.0, responsible for requesting information about network interfaces of a running QEMU domain. This flaw affects the polkit access control driver. Specifically, clients connecting to the read-write socket with limited ACL permissions could use this flaw to crash the libvirt daemon, resulting in a denial of service, or potentially escalate their privileges on the system. The highest threat from this vulnerability is to data confidentiality and integrity as well as system availability."
    },
    {
      "lang": "es",
      "value": "Se encontró que ocurría un problema de doble liberación de la memoria en la API de libvirt, en versiones anteriores a 6.8.0, responsable de pedir información sobre unas interfaces de red de un dominio QEMU en ejecución. Este fallo  afecta al controlador de control de acceso polkit. Específicamente, unos clientes que se conectan al socket de lectura y escritura con permisos limitados de ACL podrían usar este fallo para bloquear el demonio libvirt, resultando en una denegación de servicio o potencialmente escalar sus privilegios sobre el sistema. La mayor amenaza de esta vulnerabilidad es la confidencialidad e integridad de los datos, así como la disponibilidad del sistema"
    }
  ],
  "lastModified": "2026-06-17T03:07:01.517",
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