CVE Database›Document archive›CVE-2019-20396

CVE-2019-20396

libyang: heap-based buffer over-read in function lys_type_free() due to malformed pattern

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Severity

Moderate

Red Hat Product Security

4.4

CVSS 3.1

Review impact separately from score.

Published · March 29, 2019

Updated · November 22, 2025

Description

A heap-based buffer over-read flaw occurs in libyang in function lys_type_free() due to a malformed pattern statement value. Applications that use libyang to process untrusted input yang files may be vulnerable to this flaw, possibly causing a crash or information leaks.

CVSS score applicability

The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.

Mitigation

No mitigation is specified in collected source.

CVSS / CWE

CVSS 3.1 · 4.4
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N

CWE-125 · Out-of-bounds Read