CVE catalog

CVE-2019-19333

UBUNTU-CVE-2019-19333

Severity: Critical · CVSS 9.8CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Published: Dec 6, 2019, 4:15:00 PM UTC
Updated: Sep 21, 2026, 7:02:54 AM UTC
Source: [NVD] · [CVE record]
EPSS: 3.64% · Oct 25, 2026

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 "bits". 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.

Vulnerable and fixed packages

Distribution-reported package versions and fixes. These do not depend on matching against the OpenFactory package catalog.

Distribution	Package	Release	Version	Status
Debian	libyang	13	`0.16.105-2`	fixed
Debian	libyang	14	`0.16.105-2`	fixed

Fixed-version evidence

Distribution	Package	Type	Release	Fixed version	Urgency	Origin	Bugs
Debian	libyang	deb	13	`0.16.105-2`	Not reported	DEBIAN-CVE-2019-19333	Not reported
Debian	libyang	deb	14	`0.16.105-2`	Not reported	DEBIAN-CVE-2019-19333	Not reported

OpenFactory catalog packages

[Debian 13 (Trixie)]

[libyang3]Fixed
Source package: [libyang]
Details (4)
- 3.12.2-1 · amd64 · trixie
  Fixed · Fixed: 0.16.105-2
  pypi · libyang · debian · 13
- 3.12.2-1 · arm64 · trixie
  Fixed · Fixed: 0.16.105-2
  pypi · libyang · debian · 13
- 3.13.6-1~bpo13+1 · amd64 · trixie-backports
  Fixed · Fixed: 0.16.105-2
  pypi · libyang · debian · 13
- 3.13.6-1~bpo13+1 · arm64 · trixie-backports
  Fixed · Fixed: 0.16.105-2
  pypi · libyang · debian · 13
[libyang3-tools]Fixed
Source package: [libyang]
Details (4)
- 3.12.2-1 · amd64 · trixie
  Fixed · Fixed: 0.16.105-2
  pypi · libyang · debian · 13
- 3.12.2-1 · arm64 · trixie
  Fixed · Fixed: 0.16.105-2
  pypi · libyang · debian · 13
- 3.13.6-1~bpo13+1 · amd64 · trixie-backports
  Fixed · Fixed: 0.16.105-2
  pypi · libyang · debian · 13
- 3.13.6-1~bpo13+1 · arm64 · trixie-backports
  Fixed · Fixed: 0.16.105-2
  pypi · libyang · debian · 13
[libyang-dev]Fixed
Source package: [libyang]
Details (4)
- 3.12.2-1 · amd64 · trixie
  Fixed · Fixed: 0.16.105-2
  pypi · libyang · debian · 13
- 3.12.2-1 · arm64 · trixie
  Fixed · Fixed: 0.16.105-2
  pypi · libyang · debian · 13
- 3.13.6-1~bpo13+1 · amd64 · trixie-backports
  Fixed · Fixed: 0.16.105-2
  pypi · libyang · debian · 13
- 3.13.6-1~bpo13+1 · arm64 · trixie-backports
  Fixed · Fixed: 0.16.105-2
  pypi · libyang · debian · 13

Observed: Oct 23, 2026, 5:42:53 PM UTC

References

[FIRST EPSS] · [OSV Package Vulnerability Database] · [Red Hat security advisories and VEX] · [SUSE security advisories and VEX]