{"schemaVersion":3,"id":"USN-7199-1","aliases":[],"status":"published","duplicateOf":null,"title":null,"description":"libxmltok vulnerabilities\n\nIt was discovered that Expat, contained within the xmltok library,\nincorrectly handled malformed XML data. If a user or application were\ntricked into opening a crafted XML file, an attacker could cause a denial\nof service, or possibly execute arbitrary code. (CVE-2015-1283,\nCVE-2016-0718, CVE-2016-4472, CVE-2019-15903)\n\nIt was discovered that Expat, contained within the xmltok library,\nincorrectly handled XML data containing a large number of colons, which\ncould lead to excessive resource consumption. If a user or application\nwere tricked into opening a crafted XML file, an attacker could possibly\nuse this issue to cause a denial of service. (CVE-2018-20843)\n\nIt was discovered that Expat, contained within the xmltok library,\nincorrectly handled certain input, which could lead to an integer\noverflow. If a user or application were tricked into opening a crafted XML\nfile, an attacker could possibly use this issue to cause a denial of\nservice. (CVE-2021-46143, CVE-2022-22822, CVE-2022-22823, CVE-2022-22824,\nCVE-2022-22825, CVE-2022-22826, CVE-2022-22827)","dates":{"published":"2025-01-13T01:02:38.000Z","modified":"2026-04-27T17:39:58.503Z","reserved":null,"kevAdded":[],"kevDue":[]},"cvss":{"headline":{"score":null,"severity":"unknown","version":null,"versionLabel":null,"source":null,"vector":null,"computed":false,"selection":"none"},"metrics":[]},"epss":{"probability":null,"percentile":null,"severity":"unknown","asOf":null,"change":{"pp":null,"baselineDate":null,"baselineScore":null},"history":[],"last30":[]},"kev":{"state":"not-listed","entries":[],"listedCount":0,"totalCatalogs":3,"catalogs":[{"source":"cisa","label":"CISA","listed":false,"entry":null},{"source":"enisa","label":"ENISA","listed":false,"entry":null},{"source":"circl","label":"CIRCL","listed":false,"entry":null}]},"ransomware":{"state":"none-recorded","sources":[]},"exploits":[],"exploitCount":0,"weaknesses":[],"affected":[{"vendor":"ubuntu","product":"libxmltok","name":"libxmltok","label":"libxmltok","ecosystem":"Ubuntu","cpePart":null,"purl":"pkg:deb/ubuntu/libxmltok","purlType":"deb","versions":[{"text":"< 1.2-4ubuntu0.18.04.1~esm4","noFixRecorded":false,"fixedIn":null},{"text":"< 1.2-4ubuntu0.20.04.1~esm4","noFixRecorded":false,"fixedIn":null},{"text":"< 1.2-4ubuntu0.22.04.1~esm4","noFixRecorded":false,"fixedIn":null},{"text":"< 1.2-4.1ubuntu2.24.0.4.1+esm2","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 1.2-4ubuntu0.18.04.1~esm4 | < 1.2-4ubuntu0.20.04.1~esm4 | < 1.2-4ubuntu0.22.04.1~esm4 | < 1.2-4.1ubuntu2.24.0.4.1+esm2","eol":null,"hubHref":null}],"affectedCount":1,"eol":{"hasEol":false,"count":0},"references":[{"url":"https://ubuntu.com/security/notices/USN-7199-1","label":"ubuntu.com/security/notices/USN-7199-1","hostname":"ubuntu.com","tags":["Advisory"]},{"url":"https://ubuntu.com/security/CVE-2015-1283","label":"ubuntu.com/security/CVE-2015-1283","hostname":"ubuntu.com","tags":["REPORT"]},{"url":"https://ubuntu.com/security/CVE-2016-0718","label":"ubuntu.com/security/CVE-2016-0718","hostname":"ubuntu.com","tags":["REPORT"]},{"url":"https://ubuntu.com/security/CVE-2016-4472","label":"ubuntu.com/security/CVE-2016-4472","hostname":"ubuntu.com","tags":["REPORT"]},{"url":"https://ubuntu.com/security/CVE-2018-20843","label":"ubuntu.com/security/CVE-2018-20843","hostname":"ubuntu.com","tags":["REPORT"]},{"url":"https://ubuntu.com/security/CVE-2019-15903","label":"ubuntu.com/security/CVE-2019-15903","hostname":"ubuntu.com","tags":["REPORT"]},{"url":"https://ubuntu.com/security/CVE-2021-46143","label":"ubuntu.com/security/CVE-2021-46143","hostname":"ubuntu.com","tags":["REPORT"]},{"url":"https://ubuntu.com/security/CVE-2022-22822","label":"ubuntu.com/security/CVE-2022-22822","hostname":"ubuntu.com","tags":["REPORT"]},{"url":"https://ubuntu.com/security/CVE-2022-22823","label":"ubuntu.com/security/CVE-2022-22823","hostname":"ubuntu.com","tags":["REPORT"]},{"url":"https://ubuntu.com/security/CVE-2022-22824","label":"ubuntu.com/security/CVE-2022-22824","hostname":"ubuntu.com","tags":["REPORT"]},{"url":"https://ubuntu.com/security/CVE-2022-22825","label":"ubuntu.com/security/CVE-2022-22825","hostname":"ubuntu.com","tags":["REPORT"]},{"url":"https://ubuntu.com/security/CVE-2022-22826","label":"ubuntu.com/security/CVE-2022-22826","hostname":"ubuntu.com","tags":["REPORT"]},{"url":"https://ubuntu.com/security/CVE-2022-22827","label":"ubuntu.com/security/CVE-2022-22827","hostname":"ubuntu.com","tags":["REPORT"]}],"lineage":{"upstream":["CVE-2015-1283","CVE-2016-0718","CVE-2016-4472","CVE-2018-20843","CVE-2019-15903","CVE-2021-46143","CVE-2022-22822","CVE-2022-22823","CVE-2022-22824","CVE-2022-22825","CVE-2022-22826","CVE-2022-22827"],"downstream":[],"duplicates":[],"related":["CVE-2015-1283","CVE-2016-0718","CVE-2016-4472","CVE-2018-20843","CVE-2019-15903","CVE-2021-46143","CVE-2022-22822","CVE-2022-22823","CVE-2022-22824","CVE-2022-22825","CVE-2022-22826","CVE-2022-22827"]},"timeline":[{"kind":"published","date":"2025-01-13T01:02:38.000Z","label":"Published","detail":"Vulnerability first disclosed.","source":null},{"kind":"modified","date":"2026-04-27T17:39:58.503Z","label":"Last modified","detail":"Vulnerability information updated.","source":null}],"risk":{"score":0,"level":"minimal","profile":"Default","thresholds":{"critical":75,"high":50,"medium":25,"low":10}},"meta":{"dataAsOf":"2026-10-20T15:28:55.239Z","stale":false,"partial":false}}