CVE-2019-19334
In all versions of libyang before 1.0-r5, a stack-based buffer overflow was discovered in the way libyang parses YANG files with a leaf of type "identityref". An application that uses libyang to parse untrusted YANG files may be vulnerable to this flaw, which would allow an attacker to cause a denial of service or possibly gain code execution.
Key facts
- CVSS score
- 9.8 (v3.1)
- Severity
- CRITICAL
- CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H- Weakness (CWE)
- CWE-121
- EPSS score
- 3.9% (90th percentile)
- In CISA KEV
- No
- In EU EUVD
- Yes (EUVD-2019-8955)
- Published
- December 6, 2019
- NVD last modified
- June 17, 2026
- Status
- Modified
EU Vulnerability Database (EUVD)
This vulnerability is also tracked by ENISA as EUVD-2019-8955 in the EU Vulnerability Database. Last updated in EUVD on August 5, 2024.
View on the EU Vulnerability DatabaseAffected products
- cesnet / libyang
- cesnet / libyang
- cesnet / libyang
- cesnet / libyang
- cesnet / libyang
- cesnet / libyang
- cesnet / libyang
- cesnet / libyang
- cesnet / libyang
- cesnet / libyang
- cesnet / libyang
- cesnet / libyang
- cesnet / libyang
- cesnet / libyang
- cesnet / libyang
- fedoraproject / fedora
- redhat / enterprise linux
Certified products that may be affected
23 FIPS 140 or Common Criteria certified products, from automated matching by sec-certs.org.
- Red Hat Enterprise Linux 8 NSS Cryptographic Module - Red Hat, Inc. - FIPS 140 5513 - active
- Red Hat Enterprise Linux 8 Kernel Cryptographic API - Red Hat, LLC - FIPS 140 5461 - active
- Red Hat Enterprise Linux 8 Kernel Cryptographic API - Red Hat, Inc. - FIPS 140 5089 - active
- Red Hat Enterprise Linux 8 OpenSSL Cryptographic Module - Red Hat®, Inc. - FIPS 140 4642 - historical
- Red Hat Enterprise Linux 8 NSS Cryptographic Module - Red Hat®, Inc. - FIPS 140 4458 - historical
See all 23 in the Security Certifications Explorer.
References
- https://access.redhat.com/errata/RHSA-2019:4360
- https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-19334(Issue Tracking, Patch, Third Party Advisory)
- https://github.com/CESNET/libyang/commit/6980afae2ff9fcd6d67508b0a3f694d75fd059d6(Patch, Third Party Advisory)
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/PETB6TVMFV5KUD4IKVP2JPLBCYHUGSAJ/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/RL54JMS7XW7PI6JC4BFSNNLSX5AINQUL/
Last updated September 17, 2026 · Source: NVD, CISA KEV, FIRST.org EPSS
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