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CVE-2026-12245

Estado: AnalizadaAlta (8.7)—

NSD from version 4.13.0 has a heap use-after-free bug in logging errors on TLS connections, causing a crash of the server process, which can be triggered trivially by sending a DNS query over a DoT connection, and closing the connection without reading the response.

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.

NSD expone servicio DNS públicamente (AV:N, PR:N, UI:N); el crash por use-after-free en TLS es trivialmente activable, causando DoS (VA:H). CWE-416 + descripción de 'crash' confirman disponibilidad.

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)

Nlnetlabs — NSD

CWE

Referencias

JSON original (NVD)

Mostrar
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          "options": [
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              "technicalImpact": "partial"
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          "version": "2.0.3",
          "timestamp": "2026-06-25T12:42:22.635356Z"
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          "modifiedSubAvailabilityImpact": "NOT_DEFINED",
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          "modifiedVulnConfidentialityImpact": "NOT_DEFINED"
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              "versionType": "semver"
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  "published": "2026-06-25T07:16:45.080",
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        "Vendor Advisory"
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  "vulnStatus": "Analyzed",
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    }
  ],
  "lastModified": "2026-06-26T02:07:41.173",
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