{"id":"CVE-2019-19334","details":"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.","modified":"2026-08-07T15:18:52.345375Z","published":"2019-12-06T16:15:10.920Z","database_specific":{"unresolved_ranges":[{"cpes":["cpe:2.3:o:fedoraproject:fedora:31:*:*:*:*:*:*:*"],"extracted_events":[{"introduced":"31"},{"last_affected":"31"}],"source":"CPE_STRING","vendor_product":"fedoraproject:fedora"},{"cpes":["cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:*:*:*:*"],"extracted_events":[{"introduced":"8.0"},{"last_affected":"8.0"}],"source":"CPE_STRING","vendor_product":"redhat:enterprise_linux"}]},"references":[{"type":"WEB","url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/PETB6TVMFV5KUD4IKVP2JPLBCYHUGSAJ/"},{"type":"WEB","url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/RL54JMS7XW7PI6JC4BFSNNLSX5AINQUL/"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2019:4360"},{"type":"FIX","url":"https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-19334"},{"type":"FIX","url":"https://github.com/CESNET/libyang/commit/6980afae2ff9fcd6d67508b0a3f694d75fd059d6"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/cesnet/libyang","events":[{"introduced":"14a95280b2bd77b5fd1d9b5f8af71b15679f1a8f"},{"last_affected":"64248ec90179740e66416c78e0b3b914a8a07d30"},{"fixed":"6980afae2ff9fcd6d67508b0a3f694d75fd059d6"}],"database_specific":{"source":["CPE_STRING","REFERENCES"],"cpe":["cpe:2.3:a:cesnet:libyang:0.11:r1:*:*:*:*:*:*","cpe:2.3:a:cesnet:libyang:0.11:r2:*:*:*:*:*:*","cpe:2.3:a:cesnet:libyang:0.12:r1:*:*:*:*:*:*","cpe:2.3:a:cesnet:libyang:0.12:r2:*:*:*:*:*:*","cpe:2.3:a:cesnet:libyang:0.13:r1:*:*:*:*:*:*","cpe:2.3:a:cesnet:libyang:0.13:r2:*:*:*:*:*:*","cpe:2.3:a:cesnet:libyang:0.14:r1:*:*:*:*:*:*","cpe:2.3:a:cesnet:libyang:0.15:r1:*:*:*:*:*:*","cpe:2.3:a:cesnet:libyang:0.16:r1:*:*:*:*:*:*","cpe:2.3:a:cesnet:libyang:0.16:r2:*:*:*:*:*:*","cpe:2.3:a:cesnet:libyang:0.16:r3:*:*:*:*:*:*","cpe:2.3:a:cesnet:libyang:1.0:r1:*:*:*:*:*:*","cpe:2.3:a:cesnet:libyang:1.0:r2:*:*:*:*:*:*","cpe:2.3:a:cesnet:libyang:1.0:r3:*:*:*:*:*:*","cpe:2.3:a:cesnet:libyang:1.0:r4:*:*:*:*:*:*"],"extracted_events":[{"introduced":"0.11-r1"},{"last_affected":"0.11-r1"},{"introduced":"0.11-r2"},{"last_affected":"0.11-r2"},{"introduced":"0.12-r1"},{"last_affected":"0.12-r1"},{"introduced":"0.12-r2"},{"last_affected":"0.12-r2"},{"introduced":"0.13-r1"},{"last_affected":"0.13-r1"},{"introduced":"0.13-r2"},{"last_affected":"0.13-r2"},{"introduced":"0.14-r1"},{"last_affected":"0.14-r1"},{"introduced":"0.15-r1"},{"last_affected":"0.15-r1"},{"introduced":"0.16-r1"},{"last_affected":"0.16-r1"},{"introduced":"0.16-r2"},{"last_affected":"0.16-r2"},{"introduced":"0.16-r3"},{"last_affected":"0.16-r3"},{"introduced":"1.0-r1"},{"last_affected":"1.0-r1"},{"introduced":"1.0-r2"},{"last_affected":"1.0-r2"},{"introduced":"1.0-r3"},{"last_affected":"1.0-r3"},{"introduced":"1.0-r4"},{"last_affected":"1.0-r4"}]}}],"versions":["0.11-r1","0.11-r2","0.12-r1","0.12-r2","0.13-r1","0.13-r2","0.14-r1","0.15-r1","0.16-r1","0.16-r2","0.16-r3","1.0-r1","1.0-r2","1.0-r3","1.0-r4","v1.0-r4","v1.0-r3","v1.0-r2","v1.0-r1","v0.16-r2","v0.16-r1","v0.15-r1","v0.14-r1","v0.13-r2","v0.12-r2","v0.12-r1","v0.11-r2","v0.11-r1"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2019-19334.json","vanir_signatures_modified":"2026-08-07T15:18:52Z","vanir_signatures":[{"deprecated":false,"digest":{"line_hashes":["292995609282841363669975935046566204682","149517033522983099106477072070701937564","297297297624460440254951196547675551567","72996930533404138982397399557811059557","274334248161745766359455477880545863750","199060229445835364465972116034786537046"],"threshold":0.9},"id":"CVE-2019-19334-0fc85d57","signature_type":"Line","signature_version":"v1","source":"https://github.com/cesnet/libyang/commit/6980afae2ff9fcd6d67508b0a3f694d75fd059d6","target":{"file":"src/parser.c"}},{"deprecated":false,"digest":{"function_hash":"264754062392839519042860666898880122305","length":3550},"id":"CVE-2019-19334-8e9f3d59","signature_type":"Function","signature_version":"v1","source":"https://github.com/cesnet/libyang/commit/6980afae2ff9fcd6d67508b0a3f694d75fd059d6","target":{"file":"src/parser.c","function":"make_canonical"}}]}}],"schema_version":"1.8.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"}]}