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CVE-2026-32314

Estado: AnalizadaAlta (8.7)—

Yamux is a stream multiplexer over reliable, ordered connections such as TCP/IP. Prior to 0.13.10, the Rust implementation of Yamux can panic when processing a crafted inbound Data frame that sets SYN and uses a body length greater than DEFAULT_CREDIT (e.g. 262145). On the first packet of a new inbound stream, stream state is created and a receiver is queued before oversized-body validation completes. When validation fails, the temporary stream is dropped and cleanup may call remove(...).expect("stream not found"), triggering a panic in the connection state machine. This is remotely reachable over a normal Yamux session and does not require authentication. This vulnerability is fixed in 0.13.10.

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.

Yamux recibe tramas Data malformadas sin autenticación (AV:N/PR:N/UI:N). El pánico en la máquina de estados causa denegación de servicio (VA:H). CWE-248 (uncaught exception) confirma el crash remoto.

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

Filter Network TrafficVulnerability ScanningPrivileged Account ManagementNetwork SegmentationLimit Access to Resource Over NetworkApplication Isolation and Sandboxing

Tecnologías afectadas (1)

Protocol — Yamux

CWE

Referencias

JSON original (NVD)

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  "id": "CVE-2026-32314",
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  "published": "2026-03-16T14:19:34.030",
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      "lang": "en",
      "value": "Yamux is a stream multiplexer over reliable, ordered connections such as TCP/IP. Prior to 0.13.10, the Rust implementation of Yamux can panic when processing a crafted inbound Data frame that sets SYN and uses a body length greater than DEFAULT_CREDIT (e.g. 262145). On the first packet of a new inbound stream, stream state is created and a receiver is queued before oversized-body validation completes. When validation fails, the temporary stream is dropped and cleanup may call remove(...).expect(\"stream not found\"), triggering a panic in the connection state machine. This is remotely reachable over a normal Yamux session and does not require authentication. This vulnerability is fixed in 0.13.10."
    },
    {
      "lang": "es",
      "value": "Yamux es un multiplexor de flujo sobre conexiones fiables y ordenadas como TCP/IP. Antes de la versión 0.13.10, la implementación en Rust de Yamux puede entrar en pánico al procesar un marco de datos de entrada manipulado que establece SYN y utiliza una longitud de cuerpo mayor que DEFAULT_CREDIT (p. ej., 262145). En el primer paquete de un nuevo flujo de entrada, se crea el estado del flujo y se encola un receptor antes de que se complete la validación del cuerpo de tamaño excesivo. Cuando la validación falla, el flujo temporal se descarta y la limpieza puede llamar a remove(...).expect('stream not found'), lo que desencadena un pánico en la máquina de estados de la conexión. Esto es accesible remotamente a través de una sesión Yamux normal y no requiere autenticación. Esta vulnerabilidad se corrige en la versión 0.13.10."
    }
  ],
  "lastModified": "2026-06-17T10:35:32.927",
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