CVE-2026-44422

Estado: ModificadaAlta (8.8)—

FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to 3.26.0, FreeRDP's RDPEAR NDR parser accepts one non-null NDR pointer ref-id for multiple logical pointer fields without tracking the pointed object's expected NDR type or ownership. When the same ref-id is reused across two pointer fields, the parser assigns the same heap object to both output fields. The generic destructor later walks each field independently and destroys/frees both pointers. This causes a malicious-server-triggerable heap use-after-free / double-free in the FreeRDP client's RDPEAR authentication-redirection path. This vulnerability is fixed in 3.26.0.

CVSS

Versión: 3.1
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Puntuación base: 8.8

Probabilidad de explotación (EPSS)

Probabilidad de explotación en los próximos 30 días: 0.66%
Percentil entre todas las CVEs puntuadas: 50
Fecha de la puntuación: 6/10/2026

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.

ExplotaciónT1203 Exploitation for Client Executionexecution85 %
Impacto principalT1059 Command and Scripting Interpreterexecution75 %
Impacto secundarioT1068 Exploitation for Privilege Escalationprivilege escalation70 %

Vector CVSS con UI:R (requiere interacción del usuario) indica T1203. Heap use-after-free/double-free permite ejecución de código arbitrario (T1059) y potencial escalada de privilegios (T1068) en cliente FreeRDP comprometido por servidor malicioso.

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

Execution Prevention Application Isolation and Sandboxing Exploit Protection Update Software Threat Intelligence Program Restrict Web-Based Content

Tecnologías afectadas (1)

Freerdp — Freerdp

CWE

CWE-415, CWE-416
CWE-825

Referencias

JSON original (NVD)

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      "value": "FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to 3.26.0, FreeRDP's RDPEAR NDR parser accepts one non-null NDR pointer ref-id for multiple logical pointer fields without tracking the pointed object's expected NDR type or ownership. When the same ref-id is reused across two pointer fields, the parser assigns the same heap object to both output fields. The generic destructor later walks each field independently and destroys/frees both pointers. This causes a malicious-server-triggerable heap use-after-free / double-free in the FreeRDP client's RDPEAR authentication-redirection path. This vulnerability is fixed in 3.26.0."
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      "value": "FreeRDP es una implementación gratuita del Protocolo de Escritorio Remoto. Antes de 3.26.0, el analizador NDR RDPEAR de FreeRDP acepta un ref-id de puntero NDR no nulo para múltiples campos de puntero lógicos sin rastrear el tipo NDR esperado o la propiedad del objeto apuntado. Cuando el mismo ref-id se reutiliza en dos campos de puntero, el analizador asigna el mismo objeto de pila a ambos campos de salida. El destructor genérico luego recorre cada campo de forma independiente y destruye/libera ambos punteros. Esto causa un uso después de liberación de pila / doble liberación activable por servidor malicioso en la ruta de redirección de autenticación RDPEAR del cliente de FreeRDP. Esta vulnerabilidad está corregida en 3.26.0."
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