{"schemaVersion":3,"id":"USN-5379-1","aliases":[],"status":"published","duplicateOf":null,"title":null,"description":"klibc vulnerabilities\n\nIt was discovered that klibc did not properly perform\nsome mathematical operations, leading to an integer overflow.\nAn attacker could possibly use this issue to cause a crash,\nresulting in a denial of service, or possibly execute\narbitrary code. (CVE-2021-31870)\n\nIt was discovered that klibc did not properly handled some\nmemory allocations on 64 bit systems. An attacker could\npossibly use this issue to cause a crash, resulting in a\ndenial of service, or possibly execute arbitrary code.\n(CVE-2021-31871)\n\nIt was discovered that klibc did not properly handled some file\nsizes values on 32 bit systems. An attacker could possibly use\nthis issue to cause a crash, resulting in a denial of service,\nor possibly execute arbitrary code. (CVE-2021-31872)\n\nIt was discovered that klibc did not properly handled some\nmemory allocations. An attacker could possibly use this issue\nto cause a crash, resulting in a denial of service, or possibly\nexecute arbitrary code. (CVE-2021-31873)","dates":{"published":"2022-04-18T11:37:31.000Z","modified":"2026-06-29T13:49:36.327Z","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":"klibc","name":"klibc","label":"klibc","ecosystem":"Ubuntu","cpePart":null,"purl":"pkg:deb/ubuntu/klibc","purlType":"deb","versions":[{"text":"< 2.0.3-0ubuntu1.14.04.3+esm2","noFixRecorded":false,"fixedIn":null},{"text":"< 2.0.4-8ubuntu1.16.04.4+esm1","noFixRecorded":false,"fixedIn":null},{"text":"< 2.0.4-9ubuntu2.1","noFixRecorded":false,"fixedIn":null},{"text":"< 2.0.7-1ubuntu5.1","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 2.0.3-0ubuntu1.14.04.3+esm2 | < 2.0.4-8ubuntu1.16.04.4+esm1 | < 2.0.4-9ubuntu2.1 | < 2.0.7-1ubuntu5.1","eol":null,"hubHref":null}],"affectedCount":1,"eol":{"hasEol":false,"count":0},"references":[{"url":"https://ubuntu.com/security/notices/USN-5379-1","label":"ubuntu.com/security/notices/USN-5379-1","hostname":"ubuntu.com","tags":["Advisory"]},{"url":"https://ubuntu.com/security/CVE-2021-31870","label":"ubuntu.com/security/CVE-2021-31870","hostname":"ubuntu.com","tags":["REPORT"]},{"url":"https://ubuntu.com/security/CVE-2021-31871","label":"ubuntu.com/security/CVE-2021-31871","hostname":"ubuntu.com","tags":["REPORT"]},{"url":"https://ubuntu.com/security/CVE-2021-31872","label":"ubuntu.com/security/CVE-2021-31872","hostname":"ubuntu.com","tags":["REPORT"]},{"url":"https://ubuntu.com/security/CVE-2021-31873","label":"ubuntu.com/security/CVE-2021-31873","hostname":"ubuntu.com","tags":["REPORT"]}],"lineage":{"upstream":["CVE-2021-31870","CVE-2021-31871","CVE-2021-31872","CVE-2021-31873"],"downstream":[],"duplicates":[],"related":["CVE-2021-31870","CVE-2021-31871","CVE-2021-31872","CVE-2021-31873"]},"timeline":[{"kind":"published","date":"2022-04-18T11:37:31.000Z","label":"Published","detail":"Vulnerability first disclosed.","source":null},{"kind":"modified","date":"2026-06-29T13:49:36.327Z","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":"2026-10-19T21:33:09.964Z","stale":false,"partial":false}}