CVE-2025-63235

Status: DeferredHigh (7.5)—

In sol commit 373d848 (2024-12-12), the broker does not fully release resources when handling malformed or duplicate CONNECT packets. When clients send invalid CONNECT packets - either due to repeated attempts or failed authentication - the server may silently drop the connection or send a CONNACK but fail to close the session or deallocate internal resources. This behavior allows an attacker to create numerous half-open connections that consume memory and file descriptors indefinitely, potentially triggering the Linux OOM killer and causing a denial of service.

CVSS

Version: 3.1
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Base score: 7.5

Exploitation probability (EPSS)

Probability of exploitation in the next 30 days: 0.38%
Percentile among all scored CVEs: 30
Score date: 10/5/2026

EPSS (Exploit Prediction Scoring System, FIRST) estimates how likely a vulnerability is to be exploited in the wild within 30 days. It complements CVSS (impact) and CISA KEV (confirmed exploitation).

🎯 ATT&CK techniques

How this vulnerability is exploited and what the attacker gains, in MITRE ATT&CK terms.

ExploitationT1190 Exploit Public-Facing Applicationinitial access85 %
Primary impactT1499 Endpoint Denial of Serviceimpact90 %

Vulnerabilidad de red remota sin autenticación (AV:N, PR:N, UI:N) que permite consumo de recursos y DoS. CWE-400 y descripción de agotamiento de conexiones y memoria confirman T1499.

Inferred by our analysis agent from the official description, CVSS vector and CWE, and checked by a supervisor. May contain errors.

🛡️ ATT&CK mitigations that cover these techniques

Filter Network Traffic Vulnerability Scanning Privileged Account Management Network Segmentation Limit Access to Resource Over Network Application Isolation and Sandboxing

Affected technologies (1)

⚠ AI-inferred from the description — NVD hasn't analyzed this CVE yet, these aren't verified CPEs.

SOL — Broker^AI

CWEs

CWE-400

References

Raw JSON (NVD)

Show

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          "options": [
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          "timestamp": "2026-08-07T19:12:48.532653Z"
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          "integrityImpact": "NONE",
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          "attackComplexity": "LOW",
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      "value": "In sol commit 373d848 (2024-12-12), the broker does not fully release resources when handling malformed or duplicate CONNECT packets. When clients send invalid CONNECT packets - either due to repeated attempts or failed authentication - the server may silently drop the connection or send a CONNACK but fail to close the session or deallocate internal resources. This behavior allows an attacker to create numerous half-open connections that consume memory and file descriptors indefinitely, potentially triggering the Linux OOM killer and causing a denial of service."
    },
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      "lang": "es",
      "value": "En el commit sol 373d848 (2024-12-12), el broker no libera completamente los recursos al manejar paquetes CONNECT malformados o duplicados. Cuando los clientes envían paquetes CONNECT inválidos, ya sea debido a intentos repetidos o a una autenticación fallida, el servidor puede cerrar la conexión silenciosamente o enviar un CONNACK pero no cerrar la sesión o desasignar recursos internos. Este comportamiento permite a un atacante crear numerosas conexiones semiabiertas que consumen memoria y descriptores de archivo indefinidamente, lo que podría activar el OOM killer de Linux y causar una denegación de servicio."
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  "lastModified": "2026-09-29T11:10:00.150",
  "sourceIdentifier": "cve@mitre.org"
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