{"id":"USN-5071-1","summary":"linux, linux-aws, linux-aws-5.4, linux-azure, linux-azure-5.4, linux-gcp, linux-gcp-5.4, linux-gke, linux-gke-5.4, linux-gkeop, linux-gkeop-5.4, linux-kvm, linux-oracle, linux-oracle-5.4 vulnerabilities","details":"Maxim Levitsky and Paolo Bonzini discovered that the KVM hypervisor\nimplementation for AMD processors in the Linux kernel allowed a guest VM to\ndisable restrictions on VMLOAD/VMSAVE in a nested guest. An attacker in a\nguest VM could use this to read or write portions of the host's physical\nmemory. (CVE-2021-3656)\n\nMaxim Levitsky discovered that the KVM hypervisor implementation for AMD\nprocessors in the Linux kernel did not properly prevent a guest VM from\nenabling AVIC in nested guest VMs. An attacker in a guest VM could use this\nto write to portions of the host's physical memory. (CVE-2021-3653)\n\nIt was discovered that the KVM hypervisor implementation for AMD processors\nin the Linux kernel did not ensure enough processing time was given to\nperform cleanups of large SEV VMs. A local attacker could use this to cause\na denial of service (soft lockup). (CVE-2020-36311)\n\nIt was discovered that the KVM hypervisor implementation in the Linux\nkernel did not properly perform reference counting in some situations,\nleading to a use-after-free vulnerability. An attacker who could start and\ncontrol a VM could possibly use this to expose sensitive information or\nexecute arbitrary code. (CVE-2021-22543)\n\nMurray McAllister discovered that the joystick device interface in the\nLinux kernel did not properly validate data passed via an ioctl(). A local\nattacker could use this to cause a denial of service (system crash) or\npossibly execute arbitrary code on systems with a joystick device\nregistered. (CVE-2021-3612)\n","modified":"2026-06-03T13:33:59.601465593Z","published":"2021-09-08T23:41:26Z","related":["UBUNTU-CVE-2020-36311","UBUNTU-CVE-2021-22543","UBUNTU-CVE-2021-3612","UBUNTU-CVE-2021-3653","UBUNTU-CVE-2021-3656"],"upstream":["CVE-2020-36311","CVE-2021-22543","CVE-2021-3612","CVE-2021-3653","CVE-2021-3656","UBUNTU-CVE-2020-36311","UBUNTU-CVE-2021-22543","UBUNTU-CVE-2021-3612","UBUNTU-CVE-2021-3653","UBUNTU-CVE-2021-3656"],"references":[{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-5071-1"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2020-36311"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2021-3612"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2021-3653"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2021-3656"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2021-22543"}],"affected":[{"package":{"name":"linux-aws-5.4","ecosystem":"Ubuntu:18.04:LTS","purl":"pkg:deb/ubuntu/linux-aws-5.4?arch=source&distro=bionic"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"5.4.0-1056.59~18.04.1"}]}],"versions":["5.4.0-1018.18~18.04.1","5.4.0-1020.20~18.04.2","5.4.0-1022.22~18.04.1","5.4.0-1024.24~18.04.1","5.4.0-1025.25~18.04.1","5.4.0-1028.29~18.04.1","5.4.0-1029.30~18.04.1","5.4.0-1030.31~18.04.1","5.4.0-1032.33~18.04.1","5.4.0-1034.35~18.04.1","5.4.0-1035.37~18.04.1","5.4.0-1037.39~18.04.1","5.4.0-1038.40~18.04.1","5.4.0-1039.41~18.04.1","5.4.0-1041.43~18.04.1","5.4.0-1043.45~18.04.1","5.4.0-1045.47~18.04.1","5.4.0-1047.49~18.04.1","5.4.0-1048.50~18.04.1","5.4.0-1049.51~18.04.1","5.4.0-1051.53~18.04.1","5.4.0-1054.57~18.04.1","5.4.0-1055.58~18.04.1"],"ecosystem_specific":{"binaries":[{"binary_name":"linux-aws-5.4-cloud-tools-5.4.0-1056","binary_version":"5.4.0-1056.59~18.04.1"},{"binary_name":"linux-aws-5.4-headers-5.4.0-1056","binary_version":"5.4.0-1056.59~18.04.1"},{"binary_version":"5.4.0-1056.59~18.04.1","binary_name":"linux-aws-5.4-tools-5.4.0-1056"},{"binary_name":"linux-buildinfo-5.4.0-1056-aws","binary_version":"5.4.0-1056.59~18.04.1"},{"binary_name":"linux-cloud-tools-5.4.0-1056-aws","binary_version":"5.4.0-1056.59~18.04.1"},{"binary_name":"linux-headers-5.4.0-1056-aws","binary_version":"5.4.0-1056.59~18.04.1"},{"binary_name":"linux-image-5.4.0-1056-aws","binary_version":"5.4.0-1056.59~18.04.1"},{"binary_name":"linux-modules-5.4.0-1056-aws","binary_version":"5.4.0-1056.59~18.04.1"},{"binary_version":"5.4.0-1056.59~18.04.1","binary_name":"linux-modules-extra-5.4.0-1056-aws"},{"binary_name":"linux-tools-5.4.0-1056-aws","binary_version":"5.4.0-1056.59~18.04.1"}],"availability":"No 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required"},"database_specific":{"cves_map":{"ecosystem":"Ubuntu:18.04:LTS","cves":[{"severity":[{"score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","type":"CVSS_V3"},{"score":"medium","type":"Ubuntu"}],"id":"CVE-2020-36311"},{"id":"CVE-2021-3612","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"},{"type":"Ubuntu","score":"medium"}]},{"id":"CVE-2021-3653","severity":[{"score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H","type":"CVSS_V3"},{"type":"Ubuntu","score":"high"}]},{"id":"CVE-2021-3656","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H"},{"type":"Ubuntu","score":"high"}]},{"id":"CVE-2021-22543","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"},{"type":"CVSS_V4","score":"CVSS:4.0/AV:L/AC:H/AT:N/PR:L/UI:N/VC:H/VI:H/VA:L/SC:H/SI:H/SA:L"},{"score":"medium","type":"Ubuntu"}]}]},"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-5071-1.json"}},{"package":{"name":"linux-azure-5.4","ecosystem":"Ubuntu:18.04:LTS","purl":"pkg:deb/ubuntu/linux-azure-5.4?arch=source&distro=bionic"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"5.4.0-1058.60~18.04.1"}]}],"versions":["5.4.0-1020.20~18.04.1","5.4.0-1022.22~18.04.1","5.4.0-1023.23~18.04.1","5.4.0-1025.25~18.04.1","5.4.0-1026.26~18.04.1","5.4.0-1031.32~18.04.1","5.4.0-1032.33~18.04.1","5.4.0-1034.35~18.04.1","5.4.0-1035.36~18.04.1","5.4.0-1036.38~18.04.1","5.4.0-1039.41~18.04.1","5.4.0-1040.42~18.04.1","5.4.0-1041.43~18.04.1","5.4.0-1043.45~18.04.1","5.4.0-1044.46~18.04.1","5.4.0-1046.48~18.04.1","5.4.0-1047.49~18.04.1","5.4.0-1048.50~18.04.1","5.4.0-1049.51~18.04.1","5.4.0-1051.53~18.04.1","5.4.0-1055.57~18.04.1","5.4.0-1056.58~18.04.1"],"ecosystem_specific":{"binaries":[{"binary_name":"linux-azure-5.4-cloud-tools-5.4.0-1058","binary_version":"5.4.0-1058.60~18.04.1"},{"binary_version":"5.4.0-1058.60~18.04.1","binary_name":"linux-azure-5.4-headers-5.4.0-1058"},{"binary_name":"linux-azure-5.4-tools-5.4.0-1058","binary_version":"5.4.0-1058.60~18.04.1"},{"binary_version":"5.4.0-1058.60~18.04.1","binary_name":"linux-buildinfo-5.4.0-1058-azure"},{"binary_version":"5.4.0-1058.60~18.04.1","binary_name":"linux-cloud-tools-5.4.0-1058-azure"},{"binary_name":"linux-headers-5.4.0-1058-azure","binary_version":"5.4.0-1058.60~18.04.1"},{"binary_name":"linux-image-unsigned-5.4.0-1058-azure","binary_version":"5.4.0-1058.60~18.04.1"},{"binary_name":"linux-modules-5.4.0-1058-azure","binary_version":"5.4.0-1058.60~18.04.1"},{"binary_name":"linux-modules-extra-5.4.0-1058-azure","binary_version":"5.4.0-1058.60~18.04.1"},{"binary_name":"linux-tools-5.4.0-1058-azure","binary_version":"5.4.0-1058.60~18.04.1"}],"availability":"No 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