{"id":"CVE-2018-20349","details":"The igraph_i_strdiff function in igraph_trie.c in igraph through 0.7.1 has an NULL pointer dereference that allows attackers to cause a denial of service (application crash) via a crafted object.","modified":"2026-07-08T16:26:56.870138Z","published":"2018-12-22T00:29:00.273Z","references":[{"type":"WEB","url":"https://lists.debian.org/debian-lts-announce/2019/12/msg00038.html"},{"type":"WEB","url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/NCGDUNQYLSZLSGN6JJBORVFW46U3A75Y/"},{"type":"WEB","url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/OWCGXEINKJM3JQUPVCSN4RBTRKWBTYI7/"},{"type":"EVIDENCE","url":"https://github.com/igraph/igraph/issues/1141"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/igraph/igraph","events":[{"introduced":"0"},{"last_affected":"1e0d10cba19e2dc2407174230204ecbc18cef95a"}],"database_specific":{"source":"CPE_RANGE","cpe":"cpe:2.3:a:igraph:igraph:*:*:*:*:*:*:*:*","extracted_events":[{"introduced":"0"},{"last_affected":"0.7.1"}]}}],"versions":["0.7.1-post","0.7.1","0.7.0"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2018-20349.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H"}]}