{"id":"USN-5072-1","summary":"linux-azure-5.8, linux-oem-5.10 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","modified":"2026-02-10T04:42:18Z","published":"2021-09-08T23:48:20Z","related":["UBUNTU-CVE-2021-3653","UBUNTU-CVE-2021-3656"],"upstream":["CVE-2021-3653","CVE-2021-3656","UBUNTU-CVE-2021-3653","UBUNTU-CVE-2021-3656"],"references":[{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-5072-1"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2021-3653"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2021-3656"}],"affected":[{"package":{"name":"linux-azure-5.8","ecosystem":"Ubuntu:20.04:LTS","purl":"pkg:deb/ubuntu/linux-azure-5.8@5.8.0-1041.44~20.04.1?arch=source&distro=focal"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"5.8.0-1041.44~20.04.1"}]}],"versions":["5.8.0-1033.35~20.04.1","5.8.0-1036.38~20.04.1","5.8.0-1039.42~20.04.1","5.8.0-1040.43~20.04.1"],"ecosystem_specific":{"binaries":[{"binary_version":"5.8.0-1041.44~20.04.1","binary_name":"linux-azure-5.8-cloud-tools-5.8.0-1041"},{"binary_version":"5.8.0-1041.44~20.04.1","binary_name":"linux-azure-5.8-headers-5.8.0-1041"},{"binary_version":"5.8.0-1041.44~20.04.1","binary_name":"linux-azure-5.8-tools-5.8.0-1041"},{"binary_version":"5.8.0-1041.44~20.04.1","binary_name":"linux-buildinfo-5.8.0-1041-azure"},{"binary_version":"5.8.0-1041.44~20.04.1","binary_name":"linux-cloud-tools-5.8.0-1041-azure"},{"binary_version":"5.8.0-1041.44~20.04.1","binary_name":"linux-headers-5.8.0-1041-azure"},{"binary_version":"5.8.0-1041.44~20.04.1","binary_name":"linux-image-unsigned-5.8.0-1041-azure"},{"binary_version":"5.8.0-1041.44~20.04.1","binary_name":"linux-modules-5.8.0-1041-azure"},{"binary_version":"5.8.0-1041.44~20.04.1","binary_name":"linux-modules-extra-5.8.0-1041-azure"},{"binary_version":"5.8.0-1041.44~20.04.1","binary_name":"linux-tools-5.8.0-1041-azure"}],"availability":"No subscription required"},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-5072-1.json","cves_map":{"ecosystem":"Ubuntu:20.04:LTS","cves":[{"severity":[{"score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H","type":"CVSS_V3"},{"score":"high","type":"Ubuntu"}],"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"},{"score":"high","type":"Ubuntu"}],"id":"CVE-2021-3656"}]}}},{"package":{"name":"linux-oem-5.10","ecosystem":"Ubuntu:20.04:LTS","purl":"pkg:deb/ubuntu/linux-oem-5.10@5.10.0-1045.47?arch=source&distro=focal"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"5.10.0-1045.47"}]}],"versions":["5.10.0-1008.9","5.10.0-1011.12","5.10.0-1013.14","5.10.0-1014.15","5.10.0-1016.17","5.10.0-1017.18","5.10.0-1019.20","5.10.0-1021.22","5.10.0-1022.23","5.10.0-1023.24","5.10.0-1025.26","5.10.0-1026.27","5.10.0-1029.30","5.10.0-1032.33","5.10.0-1033.34","5.10.0-1034.35","5.10.0-1038.40","5.10.0-1044.46"],"ecosystem_specific":{"binaries":[{"binary_version":"5.10.0-1045.47","binary_name":"linux-buildinfo-5.10.0-1045-oem"},{"binary_version":"5.10.0-1045.47","binary_name":"linux-headers-5.10.0-1045-oem"},{"binary_version":"5.10.0-1045.47","binary_name":"linux-image-unsigned-5.10.0-1045-oem"},{"binary_version":"5.10.0-1045.47","binary_name":"linux-modules-5.10.0-1045-oem"},{"binary_version":"5.10.0-1045.47","binary_name":"linux-oem-5.10-headers-5.10.0-1045"},{"binary_version":"5.10.0-1045.47","binary_name":"linux-oem-5.10-tools-5.10.0-1045"},{"binary_version":"5.10.0-1045.47","binary_name":"linux-oem-5.10-tools-host"},{"binary_version":"5.10.0-1045.47","binary_name":"linux-tools-5.10.0-1045-oem"}],"availability":"No subscription required"},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-5072-1.json","cves_map":{"ecosystem":"Ubuntu:20.04:LTS","cves":[{"severity":[{"score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H","type":"CVSS_V3"},{"score":"high","type":"Ubuntu"}],"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"},{"score":"high","type":"Ubuntu"}],"id":"CVE-2021-3656"}]}}}],"schema_version":"1.7.3"}