{"schemaVersion":3,"id":"USN-5197-1","aliases":[],"status":"published","duplicateOf":null,"title":null,"description":"apache-log4j2 vulnerability\n\nIt was found that the fix to address CVE-2021-44228 in Apache Log4j 2.15.0 was\nincomplete in certain non-default configurations. An attacker could use this\nvulnerability to cause a denial of service.\nPlease see the following link for more information:\nhttps://wiki.ubuntu.com/SecurityTeam/KnowledgeBase/Log4Shell","dates":{"published":"2021-12-15T19:02:14.000Z","modified":"2026-02-10T04:42:24.000Z","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":"apache-log4j2","name":"apache-log4j2","label":"apache-log4j2","ecosystem":"Ubuntu","cpePart":null,"purl":"pkg:deb/ubuntu/apache-log4j2","purlType":"deb","versions":[{"text":"< 2.16.0-0.20.04.1","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 2.16.0-0.20.04.1","eol":null,"hubHref":null}],"affectedCount":1,"eol":{"hasEol":false,"count":0},"references":[{"url":"https://ubuntu.com/security/notices/USN-5197-1","label":"ubuntu.com/security/notices/USN-5197-1","hostname":"ubuntu.com","tags":["Advisory"]},{"url":"https://ubuntu.com/security/CVE-2021-44228","label":"ubuntu.com/security/CVE-2021-44228","hostname":"ubuntu.com","tags":["REPORT"]},{"url":"https://ubuntu.com/security/CVE-2021-45046","label":"ubuntu.com/security/CVE-2021-45046","hostname":"ubuntu.com","tags":["REPORT"]}],"lineage":{"upstream":["CVE-2021-44228","CVE-2021-45046"],"downstream":[],"duplicates":[],"related":["CVE-2021-44228","CVE-2021-45046"]},"timeline":[{"kind":"published","date":"2021-12-15T19:02:14.000Z","label":"Published","detail":"Vulnerability first disclosed.","source":null},{"kind":"modified","date":"2026-02-10T04:42:24.000Z","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":"2026-10-20T04:46:02.667Z","stale":false,"partial":false}}