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CVE-2019-20398

Estado: ModificadaMedia (6.5)—

A NULL pointer dereference is present in libyang before v1.0-r3 in the function lys_extension_instances_free() due to a copy of unresolved extensions in lys_restr_dup(). Applications that use libyang to parse untrusted input yang files may crash.

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).

Tecnologías afectadas (1)

Cesnet — Libyang

CWE

Referencias

JSON original (NVD)

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  "id": "CVE-2019-20398",
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          "accessVector": "NETWORK",
          "vectorString": "AV:N/AC:M/Au:N/C:N/I:N/A:P",
          "authentication": "NONE",
          "integrityImpact": "NONE",
          "accessComplexity": "MEDIUM",
          "availabilityImpact": "PARTIAL",
          "confidentialityImpact": "NONE"
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        "obtainAllPrivilege": false,
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          "userInteraction": "REQUIRED",
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  "affected": [
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  "published": "2020-01-22T22:15:10.627",
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  "vulnStatus": "Modified",
  "weaknesses": [
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    },
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    }
  ],
  "lastModified": "2026-06-17T02:30:21.860",
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}