{"schema_version":"1.7.5","id":"CVE-2019-19203","published":"2019-11-21T21:15:11.497Z","modified":"2026-07-08T16:07:57.872686Z","related":["ALSA-2020:3662","ALSA-2024:0889","SUSE-SU-2022:3327-1","openSUSE-SU-2024:11111-1"],"details":"An issue was discovered in Oniguruma 6.x before 6.9.4_rc2. In the function gb18030_mbc_enc_len in file gb18030.c, a UChar pointer is dereferenced without checking if it passed the end of the matched string. This leads to a heap-based buffer over-read.","affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/kkos/oniguruma","events":[{"introduced":"83375e4d3480d6d9f6fcd6c2f99035e9522ceeae"},{"fixed":"e03900b038a274ee2f1341039e9003875c11e47d"},{"introduced":"976a9bc4d2d53923223f56d1fcc9333430cb15f6"},{"last_affected":"976a9bc4d2d53923223f56d1fcc9333430cb15f6"},{"fixed":"681824e81bb5fc9bbd4dfbe7a07135337129537e"}],"database_specific":{"cpe":["cpe:2.3:a:oniguruma_project:oniguruma:*:*:*:*:*:*:*:*","cpe:2.3:a:oniguruma_project:oniguruma:6.9.4:rc1:*:*:*:*:*:*"],"extracted_events":[{"introduced":"6.0.0"},{"fixed":"6.9.4"},{"introduced":"6.9.4-rc1"},{"last_affected":"6.9.4-rc1"}],"source":["CPE_RANGE","CPE_STRING","REFERENCES"]}}],"versions":["6.9.4-rc1","v6.9.4_rc3","v6.9.4_rc2","v6.9.4_rc1"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2019-19203.json","vanir_signatures":[{"deprecated":false,"digest":{"line_hashes":["18679750778586343771741350755993589288","103368106136942227172244566078932066273","257727887412231991059145261695986113402","99731926145027407046045989165921264745","173237864390474915165548571384207574271","290228417168798604629944627181754726158","215947174697766211659352546659917433609","174440583955296606380940663435750254051","250394807291303202205505094138654332177"],"threshold":0.9},"id":"CVE-2019-19203-563c27e4","signature_type":"Line","signature_version":"v1","source":"https://github.com/kkos/oniguruma/commit/681824e81bb5fc9bbd4dfbe7a07135337129537e","target":{"file":"harnesses/encode-harness.c"}},{"deprecated":false,"digest":{"function_hash":"267334844810435515714121622196231420596","length":2816},"id":"CVE-2019-19203-718d8559","signature_type":"Function","signature_version":"v1","source":"https://github.com/kkos/oniguruma/commit/681824e81bb5fc9bbd4dfbe7a07135337129537e","target":{"file":"harnesses/encode-harness.c","function":"LLVMFuzzerTestOneInput"}}],"vanir_signatures_modified":"2026-07-08T16:07:57Z"}}],"references":[{"type":"WEB","url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/NO267PLHGYZSWX3XTRPKYBKD4J3YOU5V/"},{"type":"WEB","url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/V3MBNW6Z4DOXSCNWGBLQ7OA3OGUJ44WL/"},{"type":"ADVISORY","url":"https://github.com/kkos/oniguruma/releases/tag/v6.9.4_rc2"},{"type":"ADVISORY","url":"https://github.com/tarantula-team/CVE-2019-19203"},{"type":"FIX","url":"https://github.com/kkos/oniguruma/issues/163"},{"type":"EVIDENCE","url":"https://github.com/ManhNDd/CVE-2019-19203"}],"database_specific":{"unresolved_ranges":[{"cpes":["cpe:2.3:o:fedoraproject:fedora:30:*:*:*:*:*:*:*","cpe:2.3:o:fedoraproject:fedora:31:*:*:*:*:*:*:*"],"extracted_events":[{"introduced":"30"},{"last_affected":"30"},{"introduced":"31"},{"last_affected":"31"}],"source":"CPE_STRING","vendor_product":"fedoraproject:fedora"}]},"severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"}]}