{"id":"UBUNTU-CVE-2016-9777","details":"KVM in the Linux kernel before 4.8.12, when I/O APIC is enabled, does not properly restrict the VCPU index, which allows guest OS users to gain host OS privileges or cause a denial of service (out-of-bounds array access and host OS crash) via a crafted interrupt request, related to arch/x86/kvm/ioapic.c and arch/x86/kvm/ioapic.h.","modified":"2026-02-04T04:10:57.521798Z","published":"2016-12-28T00:00:00Z","related":["USN-3190-1","USN-3190-2"],"upstream":["CVE-2016-9777"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2016-9777"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=1400804"},{"type":"REPORT","url":"http://www.openwall.com/lists/oss-security/2016/12/02/2"},{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-3190-1"},{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-3190-2"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2016-9777"}],"affected":[{"package":{"name":"linux-hwe","ecosystem":"Ubuntu:16.04:LTS","purl":"pkg:deb/ubuntu/linux-hwe@4.8.0-39.42~16.04.1?arch=source&distro=xenial"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.8.0-39.42~16.04.1"}]}],"versions":["4.8.0-36.36~16.04.1"],"ecosystem_specific":{"binaries":[{"binary_name":"block-modules-4.8.0-39-generic-di","binary_version":"4.8.0-39.42~16.04.1"},{"binary_name":"block-modules-4.8.0-39-generic-lpae-di","binary_version":"4.8.0-39.42~16.04.1"},{"binary_name":"crypto-modules-4.8.0-39-generic-di","binary_version":"4.8.0-39.42~16.04.1"},{"binary_name":"crypto-modules-4.8.0-39-generic-lpae-di","binary_version":"4.8.0-39.42~16.04.1"},{"binary_name":"dasd-extra-modules-4.8.0-39-generic-di","binary_version":"4.8.0-39.42~16.04.1"},{"binary_name":"dasd-modules-4.8.0-39-generic-di","binary_version":"4.8.0-39.42~16.04.1"},{"binary_name":"fat-modules-4.8.0-39-generic-di","binary_version":"4.8.0-39.42~16.04.1"},{"binary_name":"fat-modules-4.8.0-39-generic-lpae-di","binary_version":"4.8.0-39.42~16.04.1"},{"binary_name":"fb-modules-4.8.0-39-generic-di","binary_version":"4.8.0-39.42~16.04.1"},{"binary_name":"firewire-core-modules-4.8.0-39-generic-di","binary_version":"4.8.0-39.42~16.04.1"},{"binary_name":"floppy-modules-4.8.0-39-generic-di","binary_version":"4.8.0-39.42~16.04.1"},{"binary_name":"fs-core-modules-4.8.0-39-generic-di","binary_version":"4.8.0-39.42~16.04.1"},{"binary_name":"fs-core-modules-4.8.0-39-generic-lpae-di","binary_version":"4.8.0-39.42~16.04.1"},{"binary_name":"fs-secondary-modules-4.8.0-39-generic-di","binary_version":"4.8.0-39.42~16.04.1"},{"binary_name":"fs-secondary-modules-4.8.0-39-generic-lpae-di","binary_version":"4.8.0-39.42~16.04.1"},{"binary_name":"input-modules-4.8.0-39-generic-di","binary_version":"4.8.0-39.42~16.04.1"},{"binary_name":"input-modules-4.8.0-39-generic-lpae-di","binary_version":"4.8.0-39.42~16.04.1"},{"binary_name":"ipmi-modules-4.8.0-39-generic-di","binary_version":"4.8.0-39.42~16.04.1"},{"binary_name":"ipmi-modules-4.8.0-39-generic-lpae-di","binary_version":"4.8.0-39.42~16.04.1"},{"binary_name":"irda-modules-4.8.0-39-generic-di","binary_version":"4.8.0-39.42~16.04.1"},{"binary_name":"irda-modules-4.8.0-39-generic-lpae-di","binary_version":"4.8.0-39.42~16.04.1"},{"binary_name":"kernel-image-4.8.0-39-generic-di","binary_version":"4.8.0-39.42~16.04.1"},{"binary_name":"kernel-image-4.8.0-39-generic-lpae-di","binary_version":"4.8.0-39.42~16.04.1"},{"binary_name":"linux-cloud-tools-4.8.0-39-generic","binary_version":"4.8.0-39.42~16.04.1"},{"binary_name":"linux-cloud-tools-4.8.0-39-lowlatency","binary_version":"4.8.0-39.42~16.04.1"},{"binary_name":"linux-headers-4.8.0-39","binary_version":"4.8.0-39.42~16.04.1"},{"binary_name":"linux-headers-4.8.0-39-generic","binary_version":"4.8.0-39.42~16.04.1"},{"binary_name":"linux-headers-4.8.0-39-generic-lpae","binary_version":"4.8.0-39.42~16.04.1"},{"binary_name":"linux-headers-4.8.0-39-lowlatency","binary_version":"4.8.0-39.42~16.04.1"},{"binary_name":"linux-hwe-cloud-tools-4.8.0-39","binary_version":"4.8.0-39.42~16.04.1"},{"binary_name":"linux-hwe-tools-4.8.0-39","binary_version":"4.8.0-39.42~16.04.1"},{"binary_name":"linux-hwe-udebs-generic","binary_version":"4.8.0-39.42~16.04.1"},{"binary_name":"linux-hwe-udebs-generic-lpae","binary_version":"4.8.0-39.42~16.04.1"},{"binary_name":"linux-image-4.8.0-39-generic","binary_version":"4.8.0-39.42~16.04.1"},{"binary_name":"linux-image-4.8.0-39-generic-lpae","binary_version":"4.8.0-39.42~16.04.1"},{"binary_name":"linux-image-4.8.0-39-lowlatency","binary_version":"4.8.0-39.42~16.04.1"},{"binary_name":"linux-image-extra-4.8.0-39-generic","binary_version":"4.8.0-39.42~16.04.1"},{"binary_name":"linux-source-4.8.0","binary_version":"4.8.0-39.42~16.04.1"},{"binary_name":"linux-tools-4.8.0-39-generic","binary_version":"4.8.0-39.42~16.04.1"},{"binary_name":"linux-tools-4.8.0-39-generic-lpae","binary_version":"4.8.0-39.42~16.04.1"},{"binary_name":"linux-tools-4.8.0-39-lowlatency","binary_version":"4.8.0-39.42~16.04.1"},{"binary_name":"md-modules-4.8.0-39-generic-di","binary_version":"4.8.0-39.42~16.04.1"},{"binary_name":"md-modules-4.8.0-39-generic-lpae-di","binary_version":"4.8.0-39.42~16.04.1"},{"binary_name":"message-modules-4.8.0-39-generic-di","binary_version":"4.8.0-39.42~16.04.1"},{"binary_name":"mouse-modules-4.8.0-39-ge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