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CVE-2026-23558

Estado: AnalizadaAlta (7.8)—

The adjustments made for XSA-379 as well as those subsequently becoming XSA-387 still left a race window, when a HVM or PVH guest does a grant table version change from v2 to v1 in parallel with mapping the status page(s) via XENMEM_add_to_physmap. Some of the status pages may then be freed while mappings of them would still be inserted into the guest's secondary (P2M) page tables.

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).

🎯 Técnicas ATT&CK

Cómo se explota esta vulnerabilidad y qué consigue el atacante, en el lenguaje de MITRE ATT&CK.

Vulnerabilidad de race condition (CWE-362) en Xen que permite a usuario local (PR:L) con acceso al sistema de grant tables escalar privilegios mediante cambio de versión en paralelo; la condición de acceso local (AV:L) sin interacción (UI:N) y scope elevado (S:C) con impacto crítico en confidenciali

Inferido por nuestro agente de análisis a partir de la descripción oficial, el vector CVSS y la CWE, y comprobado por un supervisor. Puede contener errores.

🛡️ Mitigaciones ATT&CK que cubren estas técnicas

Threat Intelligence ProgramFilter Network TrafficExecution PreventionApplication Isolation and SandboxingExploit ProtectionUpdate Software

Tecnologías afectadas (1)

XEN — XEN

CWE

Referencias

JSON original (NVD)

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          "options": [
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            },
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    }
  ],
  "lastModified": "2026-06-17T10:21:46.760",
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