{"schemaVersion":3,"id":"USN-4985-1","aliases":[],"status":"published","duplicateOf":null,"title":null,"description":"intel-microcode vulnerabilities\n\nIt was discovered that some Intel processors may not properly invalidate\ncache entries used by Intel Virtualization Technology for Directed I/O\n(VT-d). This may allow a local user to perform a privilege escalation\nattack. (CVE-2020-24489)\n\nJoseph Nuzman discovered that some Intel processors may not properly apply\nEIBRS mitigations (originally developed for CVE-2017-5715) and hence may\nallow unauthorized memory reads via sidechannel attacks. A local attacker\ncould use this to expose sensitive information, including kernel\nmemory. (CVE-2020-24511)\n\nTravis Downs discovered that some Intel processors did not properly flush\ncache-lines for trivial-data values. This may allow an unauthorized user to\ninfer the presence of these trivial-data-cache-lines via timing sidechannel\nattacks. A local attacker could use this to expose sensitive\ninformation. (CVE-2020-24512)\n\nIt was discovered that certain Intel Atom processors could expose memory\ncontents stored in microarchitectural buffers. A local attacker could use\nthis to expose sensitive information. (CVE-2020-24513)","dates":{"published":"2021-06-09T05:22:21.000Z","modified":"2026-06-29T13:49:11.308Z","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":"intel-microcode","name":"intel-microcode","label":"intel-microcode","ecosystem":"Ubuntu","cpePart":null,"purl":"pkg:deb/ubuntu/intel-microcode","purlType":"deb","versions":[{"text":"< 3.20210608.0ubuntu0.14.04.1+esm1","noFixRecorded":false,"fixedIn":null},{"text":"< 3.20210608.0ubuntu0.16.04.1+esm1","noFixRecorded":false,"fixedIn":null},{"text":"< 3.20210608.0ubuntu0.18.04.1","noFixRecorded":false,"fixedIn":null},{"text":"< 3.20210608.0ubuntu0.20.04.1","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 3.20210608.0ubuntu0.14.04.1+esm1 | < 3.20210608.0ubuntu0.16.04.1+esm1 | < 3.20210608.0ubuntu0.18.04.1 | < 3.20210608.0ubuntu0.20.04.1","eol":null,"hubHref":null}],"affectedCount":1,"eol":{"hasEol":false,"count":0},"references":[{"url":"https://ubuntu.com/security/notices/USN-4985-1","label":"ubuntu.com/security/notices/USN-4985-1","hostname":"ubuntu.com","tags":["Advisory"]},{"url":"https://ubuntu.com/security/CVE-2020-24489","label":"ubuntu.com/security/CVE-2020-24489","hostname":"ubuntu.com","tags":["REPORT"]},{"url":"https://ubuntu.com/security/CVE-2020-24511","label":"ubuntu.com/security/CVE-2020-24511","hostname":"ubuntu.com","tags":["REPORT"]},{"url":"https://ubuntu.com/security/CVE-2020-24512","label":"ubuntu.com/security/CVE-2020-24512","hostname":"ubuntu.com","tags":["REPORT"]},{"url":"https://ubuntu.com/security/CVE-2020-24513","label":"ubuntu.com/security/CVE-2020-24513","hostname":"ubuntu.com","tags":["REPORT"]}],"lineage":{"upstream":["CVE-2020-24489","CVE-2020-24511","CVE-2020-24512","CVE-2020-24513"],"downstream":[],"duplicates":[],"related":["CVE-2020-24489","CVE-2020-24511","CVE-2020-24512","CVE-2020-24513"]},"timeline":[{"kind":"published","date":"2021-06-09T05:22:21.000Z","label":"Published","detail":"Vulnerability first disclosed.","source":null},{"kind":"modified","date":"2026-06-29T13:49:11.308Z","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":"2026-10-20T01:13:09.867Z","stale":false,"partial":false}}