TI-2019-14626 Aliases CVE-2019-20392 GHSA-5xx9-wg6x-hj24

An invalid memory access flaw is present in libyang before v1.0-r1 in the function…

LOW 33CWE-119Published 2020-01-22 · Updated 2024-08-05

Key facts

Attack vector: Network
Privileges required: None
User interaction: Required
Attack complexity: Low
Impact type: Denial of service
Confidentiality · integrity · availability: None · None · High
Fix status: Fixed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA and Red Hat. Impact type from CWE-119 and the CVSS impact.

Summary

An invalid memory access flaw is present in libyang before v1.0-r1 in the function resolve_feature_value() when an if-feature statement is used inside a list key node, and the feature used is not defined. Applications that use libyang to parse untrusted input yang files may crash.

Why it matters now

EPSS 0.01876 79th percentileScored 2026-11-07

Public exploit Yes 1 exploit referenceTagged by NVD

Fix Fixed No fixed version in the sources yet

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
—	—	all versions	—	No fix listed	CNA

— Vendor— Affected all versions Fixed in — No fix listed CNA

CPE configurations NVD · 11

CPE	Versions	Role	Vendor
cpe:2.3:a:cesnet:libyang:0.11:r1::::::	0.11 r1	Vulnerable	CESNET
cpe:2.3:a:cesnet:libyang:0.11:r2::::::	0.11 r2	Vulnerable	CESNET
cpe:2.3:a:cesnet:libyang:0.12:r1::::::	0.12 r1	Vulnerable	CESNET
cpe:2.3:a:cesnet:libyang:0.12:r2::::::	0.12 r2	Vulnerable	CESNET
cpe:2.3:a:cesnet:libyang:0.13:r1::::::	0.13 r1	Vulnerable	CESNET
cpe:2.3:a:cesnet:libyang:0.13:r2::::::	0.13 r2	Vulnerable	CESNET
cpe:2.3:a:cesnet:libyang:0.14:r1::::::	0.14 r1	Vulnerable	CESNET
cpe:2.3:a:cesnet:libyang:0.15:r1::::::	0.15 r1	Vulnerable	CESNET
cpe:2.3:a:cesnet:libyang:0.16:r1::::::	0.16 r1	Vulnerable	CESNET
cpe:2.3:a:cesnet:libyang:0.16:r2::::::	0.16 r2	Vulnerable	CESNET

cpe:2.3:a:cesnet:libyang:0.11:r1:*:*:*:*:*:* Versions 0.11 r1 Vulnerable ·CESNET
cpe:2.3:a:cesnet:libyang:0.11:r2:*:*:*:*:*:* Versions 0.11 r2 Vulnerable ·CESNET
cpe:2.3:a:cesnet:libyang:0.12:r1:*:*:*:*:*:* Versions 0.12 r1 Vulnerable ·CESNET
cpe:2.3:a:cesnet:libyang:0.12:r2:*:*:*:*:*:* Versions 0.12 r2 Vulnerable ·CESNET
cpe:2.3:a:cesnet:libyang:0.13:r1:*:*:*:*:*:* Versions 0.13 r1 Vulnerable ·CESNET
cpe:2.3:a:cesnet:libyang:0.13:r2:*:*:*:*:*:* Versions 0.13 r2 Vulnerable ·CESNET
cpe:2.3:a:cesnet:libyang:0.14:r1:*:*:*:*:*:* Versions 0.14 r1 Vulnerable ·CESNET
cpe:2.3:a:cesnet:libyang:0.15:r1:*:*:*:*:*:* Versions 0.15 r1 Vulnerable ·CESNET
cpe:2.3:a:cesnet:libyang:0.16:r1:*:*:*:*:*:* Versions 0.16 r1 Vulnerable ·CESNET
cpe:2.3:a:cesnet:libyang:0.16:r2:*:*:*:*:*:* Versions 0.16 r2 Vulnerable ·CESNET

Show 1 more CPE

CPE	Versions	Role	Vendor
cpe:2.3:a:cesnet:libyang:0.16:r3::::::	0.16 r3	Vulnerable	CESNET

cpe:2.3:a:cesnet:libyang:0.16:r3:*:*:*:*:*:* Versions 0.16 r3 Vulnerable ·CESNET

Remediation

No fixed version listed by the sources yet.

Vendor assessments

Red Hat

Red Hat rating: Low. Red Hat's page for this CVE →

Product	Status	Plan or fix
Red Hat Enterprise Linux AppStream (v. 8)	Fixed	—

Timeline

2026-10-02 Threatist record created from CVE-2019-20392
2026-10-03 Alias added: GHSA-5xx9-wg6x-hj24

References

Exploit 1

https://github.com/CESNET/libyang/issues/723

Patch 2

Advisory 1

https://github.com/CESNET/libyang/compare/v0.16-r3...v1.0-r1

Other 1

[debian-lts-announce] 20230919 [SECURITY] [DLA 3572-1] libyang security update

TI-2023-11820 libyang from v2.0.164 to v2.1.30 was discovered to contain a NULL pointer dereference via… CVSS 3.1HIGH 7.5
TI-2019-13946 Stack-based buffer overflow in Red Hat libyang CVSS 3.1CRITICAL 9.8
TI-2019-13945 Stack-based buffer overflow in Red Hat libyang CVSS 3.1CRITICAL 9.8
TI-2019-14631 A double-free is present in libyang before v1.0-r1 in the function yyparse() when an… CVSS 3.1HIGH 8.8
TI-2019-14628 A double-free is present in libyang before v1.0-r3 in the function yyparse() when a type… CVSS 3.1HIGH 8.8
TI-2019-14627 A double-free is present in libyang before v1.0-r1 in the function yyparse() when an… CVSS 3.1HIGH 8.8

See all 16 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences