{"id":"UBUNTU-CVE-2019-20396","details":"A segmentation fault is present in yyparse in libyang before v1.0-r1 due to a malformed pattern statement value during lys_parse_path parsing.","modified":"2026-04-22T13:43:42.233880Z","published":"2020-01-22T22:15:00Z","upstream":["CVE-2019-20396"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2019-20396"},{"type":"REPORT","url":"https://github.com/CESNET/libyang/commit/a1f17693904ed6fecc8902c747fc50a8f20e6af8"},{"type":"REPORT","url":"https://github.com/CESNET/libyang/issues/740"},{"type":"REPORT","url":"https://github.com/CESNET/libyang/compare/v0.16-r3...v1.0-r1"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2019-20396"}],"affected":[{"package":{"name":"libyang","ecosystem":"Ubuntu:20.04:LTS","purl":"pkg:deb/ubuntu/libyang@0.16.105-3build1?arch=source&distro=focal"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.16.105-1","0.16.105-2","0.16.105-3","0.16.105-3build1"],"ecosystem_specific":{"binaries":[{"binary_version":"0.16.105-3build1","binary_name":"libyang-cpp0.16"},{"binary_version":"0.16.105-3build1","binary_name":"libyang0.16"},{"binary_version":"0.16.105-3build1","binary_name":"python3-yang"},{"binary_version":"0.16.105-3build1","binary_name":"yang-tools"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2019/UBUNTU-CVE-2019-20396.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H"},{"type":"Ubuntu","score":"medium"}]}