{"schemaVersion":3,"id":"USN-5720-1","aliases":[],"status":"published","duplicateOf":null,"title":null,"description":"libzstd vulnerabilities\n\nIt was discovered that Zstandard was not properly managing file\npermissions when generating output files. A local attacker could\npossibly use this issue to cause a race condition and gain\nunauthorized access to sensitive data.","dates":{"published":"2022-11-09T12:00:15.000Z","modified":"2026-06-25T13:31:32.696Z","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":"libzstd","name":"libzstd","label":"libzstd","ecosystem":"Ubuntu","cpePart":null,"purl":"pkg:deb/ubuntu/libzstd","purlType":"deb","versions":[{"text":"< 1.3.1+dfsg-1~ubuntu0.16.04.1+esm3","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 1.3.1+dfsg-1~ubuntu0.16.04.1+esm3","eol":null,"hubHref":null}],"affectedCount":1,"eol":{"hasEol":false,"count":0},"references":[{"url":"https://ubuntu.com/security/notices/USN-5720-1","label":"ubuntu.com/security/notices/USN-5720-1","hostname":"ubuntu.com","tags":["Advisory"]},{"url":"https://ubuntu.com/security/CVE-2021-24031","label":"ubuntu.com/security/CVE-2021-24031","hostname":"ubuntu.com","tags":["REPORT"]},{"url":"https://ubuntu.com/security/CVE-2021-24032","label":"ubuntu.com/security/CVE-2021-24032","hostname":"ubuntu.com","tags":["REPORT"]}],"lineage":{"upstream":["CVE-2021-24031","CVE-2021-24032"],"downstream":[],"duplicates":[],"related":["CVE-2021-24031","CVE-2021-24032"]},"timeline":[{"kind":"published","date":"2022-11-09T12:00:15.000Z","label":"Published","detail":"Vulnerability first disclosed.","source":null},{"kind":"modified","date":"2026-06-25T13:31:32.696Z","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":"2026-10-20T21:22:12.280Z","stale":false,"partial":false}}