{"schemaVersion":3,"id":"USN-5208-1","aliases":[],"status":"published","duplicateOf":null,"title":null,"description":"linux, linux-aws, linux-aws-5.11, linux-azure, linux-azure-5.11, linux-gcp, linux-gcp-5.11, linux-hwe-5.11, linux-kvm, linux-oracle, linux-oracle-5.11, linux-raspi vulnerabilities\n\nNadav Amit discovered that the hugetlb implementation in the Linux kernel\ndid not perform TLB flushes under certain conditions. A local attacker\ncould use this to leak or alter data from other processes that use huge\npages. (CVE-2021-4002)\n\nIt was discovered that a race condition existed in the overlay file system\nimplementation in the Linux kernel. A local attacker could use this to\ncause a denial of service (system crash). (CVE-2021-20321)\n\nIt was discovered that the NFC subsystem in the Linux kernel contained a\nuse-after-free vulnerability in its NFC Controller Interface (NCI)\nimplementation. A local attacker could possibly use this to cause a denial\nof service (system crash) or execute arbitrary code. (CVE-2021-3760)\n\nIt was discovered that an integer overflow could be triggered in the eBPF\nimplementation in the Linux kernel when preallocating objects for stack\nmaps. A privileged local attacker could use this to cause a denial of\nservice or possibly execute arbitrary code. (CVE-2021-41864)\n\nIt was discovered that the KVM implementation for POWER8 processors in the\nLinux kernel did not properly keep track if a wakeup event could be\nresolved by a guest. An attacker in a guest VM could possibly use this to\ncause a denial of service (host OS crash). (CVE-2021-43056)\n\nIt was discovered that the TIPC Protocol implementation in the Linux kernel\ndid not properly validate MSG_CRYPTO messages in some situations. An\nattacker could use this to cause a denial of service (system crash) or\npossibly execute arbitrary code. (CVE-2021-43267)\n\nIt was discovered that the ISDN CAPI implementation in the Linux kernel\ncontained a race condition in certain situations that could trigger an\narray out-of-bounds bug. A privileged local attacker could possibly use\nthis to cause a denial of service or execute arbitrary code.\n(CVE-2021-43389)","dates":{"published":"2022-01-06T02:05:41.000Z","modified":"2026-09-09T14:33:22.821Z","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":"linux-aws-5.11","name":"linux-aws-5.11","label":"linux-aws-5.11","ecosystem":"Ubuntu","cpePart":null,"purl":"pkg:deb/ubuntu/linux-aws-5.11","purlType":"deb","versions":[{"text":"< 5.11.0-1023.24~20.04.1","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 5.11.0-1023.24~20.04.1","eol":null,"hubHref":null},{"vendor":"ubuntu","product":"linux-azure-5.11","name":"linux-azure-5.11","label":"linux-azure-5.11","ecosystem":"Ubuntu","cpePart":null,"purl":"pkg:deb/ubuntu/linux-azure-5.11","purlType":"deb","versions":[{"text":"< 5.11.0-1023.24~20.04.1","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 5.11.0-1023.24~20.04.1","eol":null,"hubHref":null},{"vendor":"ubuntu","product":"linux-gcp-5.11","name":"linux-gcp-5.11","label":"linux-gcp-5.11","ecosystem":"Ubuntu","cpePart":null,"purl":"pkg:deb/ubuntu/linux-gcp-5.11","purlType":"deb","versions":[{"text":"< 5.11.0-1024.26~20.04.1","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 5.11.0-1024.26~20.04.1","eol":null,"hubHref":null},{"vendor":"ubuntu","product":"linux-hwe-5.11","name":"linux-hwe-5.11","label":"linux-hwe-5.11","ecosystem":"Ubuntu","cpePart":null,"purl":"pkg:deb/ubuntu/linux-hwe-5.11","purlType":"deb","versions":[{"text":"< 5.11.0-44.48~20.04.2","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 5.11.0-44.48~20.04.2","eol":null,"hubHref":null},{"vendor":"ubuntu","product":"linux-oracle-5.11","name":"linux-oracle-5.11","label":"linux-oracle-5.11","ecosystem":"Ubuntu","cpePart":null,"purl":"pkg:deb/ubuntu/linux-oracle-5.11","purlType":"deb","versions":[{"text":"< 5.11.0-1023.24~20.04.1","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 5.11.0-1023.24~20.04.1","eol":null,"hubHref":null}],"affectedCount":5,"eol":{"hasEol":false,"count":0},"references":[{"url":"https://ubuntu.com/security/notices/USN-5208-1","label":"ubuntu.com/security/notices/USN-5208-1","hostname":"ubuntu.com","tags":["Advisory"]},{"url":"https://ubuntu.com/security/CVE-2021-3760","label":"ubuntu.com/security/CVE-2021-3760","hostname":"ubuntu.com","tags":["REPORT"]},{"url":"https://ubuntu.com/security/CVE-2021-4002","label":"ubuntu.com/security/CVE-2021-4002","hostname":"ubuntu.com","tags":["REPORT"]},{"url":"https://ubuntu.com/security/CVE-2021-20321","label":"ubuntu.com/security/CVE-2021-20321","hostname":"ubuntu.com","tags":["REPORT"]},{"url":"https://ubuntu.com/security/CVE-2021-41864","label":"ubuntu.com/security/CVE-2021-41864","hostname":"ubuntu.com","tags":["REPORT"]},{"url":"https://ubuntu.com/security/CVE-2021-43056","label":"ubuntu.com/security/CVE-2021-43056","hostname":"ubuntu.com","tags":["REPORT"]},{"url":"https://ubuntu.com/security/CVE-2021-43267","label":"ubuntu.com/security/CVE-2021-43267","hostname":"ubuntu.com","tags":["REPORT"]},{"url":"https://ubuntu.com/security/CVE-2021-43389","label":"ubuntu.com/security/CVE-2021-43389","hostname":"ubuntu.com","tags":["REPORT"]}],"lineage":{"upstream":["CVE-2021-20321","CVE-2021-3760","CVE-2021-4002","CVE-2021-41864","CVE-2021-43056","CVE-2021-43267","CVE-2021-43389"],"downstream":[],"duplicates":[],"related":["CVE-2021-20321","CVE-2021-3760","CVE-2021-4002","CVE-2021-41864","CVE-2021-43056","CVE-2021-43267","CVE-2021-43389"]},"timeline":[{"kind":"published","date":"2022-01-06T02:05:41.000Z","label":"Published","detail":"Vulnerability first disclosed.","source":null},{"kind":"modified","date":"2026-09-09T14:33:22.821Z","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":"2026-10-19T13:28:53.787Z","stale":false,"partial":false}}