{"schemaVersion":3,"id":"USN-2994-1","aliases":[],"status":"published","duplicateOf":null,"title":null,"description":"libxml2 vulnerabilities\n\nIt was discovered that libxml2 incorrectly handled certain malformed\ndocuments. If a user or automated system were tricked into opening a\nspecially crafted document, an attacker could possibly cause libxml2 to\ncrash, resulting in a denial of service. (CVE-2015-8806, CVE-2016-2073,\nCVE-2016-3627, CVE-2016-3705, CVE-2016-4447)\n\nIt was discovered that libxml2 incorrectly handled certain malformed\ndocuments. If a user or automated system were tricked into opening a\nspecially crafted document, an attacker could cause libxml2 to crash,\nresulting in a denial of service, or possibly execute arbitrary code.\n(CVE-2016-1762, CVE-2016-1834)\n\nMateusz Jurczyk discovered that libxml2 incorrectly handled certain\nmalformed documents. If a user or automated system were tricked into\nopening a specially crafted document, an attacker could cause libxml2 to\ncrash, resulting in a denial of service, or possibly execute arbitrary\ncode. (CVE-2016-1833, CVE-2016-1838, CVE-2016-1839)\n\nWei Lei and Liu Yang discovered that libxml2 incorrectly handled certain\nmalformed documents. If a user or automated system were tricked into\nopening a specially crafted document, an attacker could cause libxml2 to\ncrash, resulting in a denial of service, or possibly execute arbitrary\ncode. (CVE-2016-1835, CVE-2016-1837)\n\nWei Lei and Liu Yang discovered that libxml2 incorrectly handled certain\nmalformed documents. If a user or automated system were tricked into\nopening a specially crafted document, an attacker could cause libxml2 to\ncrash, resulting in a denial of service, or possibly execute arbitrary\ncode. This issue only applied to Ubuntu 14.04 LTS, Ubuntu 15.10 and\nUbuntu 16.04 LTS. (CVE-2016-1836)\n\nKostya Serebryany discovered that libxml2 incorrectly handled certain\nmalformed documents. If a user or automated system were tricked into\nopening a specially crafted document, an attacker could cause libxml2 to\ncrash, resulting in a denial of service, or possibly execute arbitrary\ncode. (CVE-2016-1840)\n\nIt was discovered that libxml2 would load certain XML external entities. If\na user or automated system were tricked into opening a specially crafted\ndocument, an attacker could possibly obtain access to arbitrary files or\ncause resource consumption. (CVE-2016-4449)\n\nGustavo Grieco discovered that libxml2 incorrectly handled certain\nmalformed documents. If a user or automated system were tricked into\nopening a specially crafted document, an attacker could possibly cause\nlibxml2 to crash, resulting in a denial of service. (CVE-2016-4483)","dates":{"published":"2016-06-06T16:43:37.000Z","modified":"2026-04-22T09:25:46.534Z","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":"libxml2","name":"libxml2","label":"libxml2","ecosystem":"Ubuntu","cpePart":null,"purl":"pkg:deb/ubuntu/libxml2","purlType":"deb","versions":[{"text":"< 2.9.1+dfsg1-3ubuntu4.8","noFixRecorded":false,"fixedIn":null},{"text":"< 2.9.3+dfsg1-1ubuntu0.1","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 2.9.1+dfsg1-3ubuntu4.8 | < 2.9.3+dfsg1-1ubuntu0.1","eol":null,"hubHref":null}],"affectedCount":1,"eol":{"hasEol":false,"count":0},"references":[{"url":"https://ubuntu.com/security/notices/USN-2994-1","label":"ubuntu.com/security/notices/USN-2994-1","hostname":"ubuntu.com","tags":["Advisory"]},{"url":"https://ubuntu.com/security/CVE-2015-8806","label":"ubuntu.com/security/CVE-2015-8806","hostname":"ubuntu.com","tags":["REPORT"]},{"url":"https://ubuntu.com/security/CVE-2016-1762","label":"ubuntu.com/security/CVE-2016-1762","hostname":"ubuntu.com","tags":["REPORT"]},{"url":"https://ubuntu.com/security/CVE-2016-1833","label":"ubuntu.com/security/CVE-2016-1833","hostname":"ubuntu.com","tags":["REPORT"]},{"url":"https://ubuntu.com/security/CVE-2016-1834","label":"ubuntu.com/security/CVE-2016-1834","hostname":"ubuntu.com","tags":["REPORT"]},{"url":"https://ubuntu.com/security/CVE-2016-1835","label":"ubuntu.com/security/CVE-2016-1835","hostname":"ubuntu.com","tags":["REPORT"]},{"url":"https://ubuntu.com/security/CVE-2016-1836","label":"ubuntu.com/security/CVE-2016-1836","hostname":"ubuntu.com","tags":["REPORT"]},{"url":"https://ubuntu.com/security/CVE-2016-1837","label":"ubuntu.com/security/CVE-2016-1837","hostname":"ubuntu.com","tags":["REPORT"]},{"url":"https://ubuntu.com/security/CVE-2016-1838","label":"ubuntu.com/security/CVE-2016-1838","hostname":"ubuntu.com","tags":["REPORT"]},{"url":"https://ubuntu.com/security/CVE-2016-1839","label":"ubuntu.com/security/CVE-2016-1839","hostname":"ubuntu.com","tags":["REPORT"]},{"url":"https://ubuntu.com/security/CVE-2016-1840","label":"ubuntu.com/security/CVE-2016-1840","hostname":"ubuntu.com","tags":["REPORT"]},{"url":"https://ubuntu.com/security/CVE-2016-2073","label":"ubuntu.com/security/CVE-2016-2073","hostname":"ubuntu.com","tags":["REPORT"]},{"url":"https://ubuntu.com/security/CVE-2016-3627","label":"ubuntu.com/security/CVE-2016-3627","hostname":"ubuntu.com","tags":["REPORT"]},{"url":"https://ubuntu.com/security/CVE-2016-3705","label":"ubuntu.com/security/CVE-2016-3705","hostname":"ubuntu.com","tags":["REPORT"]},{"url":"https://ubuntu.com/security/CVE-2016-4447","label":"ubuntu.com/security/CVE-2016-4447","hostname":"ubuntu.com","tags":["REPORT"]},{"url":"https://ubuntu.com/security/CVE-2016-4449","label":"ubuntu.com/security/CVE-2016-4449","hostname":"ubuntu.com","tags":["REPORT"]},{"url":"https://ubuntu.com/security/CVE-2016-4483","label":"ubuntu.com/security/CVE-2016-4483","hostname":"ubuntu.com","tags":["REPORT"]}],"lineage":{"upstream":["CVE-2015-8806","CVE-2016-1762","CVE-2016-1833","CVE-2016-1834","CVE-2016-1835","CVE-2016-1836","CVE-2016-1837","CVE-2016-1838","CVE-2016-1839","CVE-2016-1840","CVE-2016-2073","CVE-2016-3627","CVE-2016-3705","CVE-2016-4447","CVE-2016-4449","CVE-2016-4483"],"downstream":[],"duplicates":[],"related":["CVE-2015-8806","CVE-2016-1762","CVE-2016-1833","CVE-2016-1834","CVE-2016-1835","CVE-2016-1836","CVE-2016-1837","CVE-2016-1838","CVE-2016-1839","CVE-2016-1840","CVE-2016-2073","CVE-2016-3627","CVE-2016-3705","CVE-2016-4447","CVE-2016-4449","CVE-2016-4483"]},"timeline":[{"kind":"published","date":"2016-06-06T16:43:37.000Z","label":"Published","detail":"Vulnerability first disclosed.","source":null},{"kind":"modified","date":"2026-04-22T09:25:46.534Z","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":"2026-10-19T17:41:54.951Z","stale":false,"partial":false}}