CVE-2019-18224NVD

Vulnerability Summary

idn2_to_ascii_4i in lib/lookup.c in GNU libidn2 before 2.1.1 has a heap-based buffer overflow via a long domain string.

Severity Level

CRITICAL(9.8)

Published Date

Oct 21, 2019

Last Modified

Oct 14, 2026

Exploitation Status

No confirmed exploitation yet

EPSS Score (30-Day)

3.71%Probability

Root Weakness (CWE)

CWE-787: Unknown/Unlisted Weakness ↗

Refer to the official MITRE database for detailed architectural specifications regarding this weakness.

CVSS v3.1 Base Metrics — Score 9.8 (CRITICAL)

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredNone

User InteractionNone

ScopeUnchanged

ConfidentialityHigh

IntegrityHigh

AvailabilityHigh

Affected & Patched Versions

Affected Versions

Gnu Libidn2 < 2.1.1

Patched Versions

Gnu Libidn2 2.1.1

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