{"schema_version":"1.9.0","id":"USN-5208-1","published":"2022-01-06T02:05:41Z","modified":"2026-09-09T14:33:22.821546572Z","related":["UBUNTU-CVE-2021-20321","UBUNTU-CVE-2021-3760","UBUNTU-CVE-2021-4002","UBUNTU-CVE-2021-41864","UBUNTU-CVE-2021-43056","UBUNTU-CVE-2021-43267","UBUNTU-CVE-2021-43389"],"upstream":["CVE-2021-20321","CVE-2021-3760","CVE-2021-4002","CVE-2021-41864","CVE-2021-43056","CVE-2021-43267","CVE-2021-43389","UBUNTU-CVE-2021-20321","UBUNTU-CVE-2021-3760","UBUNTU-CVE-2021-4002","UBUNTU-CVE-2021-41864","UBUNTU-CVE-2021-43056","UBUNTU-CVE-2021-43267","UBUNTU-CVE-2021-43389"],"summary":"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","details":"Nadav 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)\n","affected":[{"package":{"name":"linux-aws-5.11","ecosystem":"Ubuntu:20.04:LTS","purl":"pkg:deb/ubuntu/linux-aws-5.11?arch=source&distro=focal"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"5.11.0-1023.24~20.04.1"}]}],"versions":["5.11.0-1009.9~20.04.2","5.11.0-1014.15~20.04.1","5.11.0-1016.17~20.04.1","5.11.0-1017.18~20.04.1","5.11.0-1019.20~20.04.1","5.11.0-1020.21~20.04.2","5.11.0-1021.22~20.04.2","5.11.0-1022.23~20.04.1"],"ecosystem_specific":{"availability":"No subscription 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