CVE ID:	CVE-2019-14821
Description:	An out-of-bounds access issue was found in the Linux kernel, all versions through 5.3, in the way Linux kernel's KVM hypervisor implements the Coalesced MMIO write operation. It operates on an MMIO ring buffer 'struct kvm_coalesced_mmio' object, wherein write indices 'ring->first' and 'ring->last' value could be supplied by a host user- space process. An unprivileged host user or process with access to '/dev/kvm' device could use this flaw to crash the host kernel, resulting in a denial of service or potentially escalating privileges on the system.
Test IDs:	1.3.6.1.4.1.25623.1.0.876842   1.3.6.1.4.1.25623.1.1.2.2021.2856   1.3.6.1.4.1.25623.1.0.883149   1.3.6.1.4.1.25623.1.0.891930   1.3.6.1.4.1.25623.1.0.891940   1.3.6.1.4.1.25623.1.0.704531
Cross References:	Common Vulnerability Exposure (CVE) ID: CVE-2019-14821 20190925 [SECURITY] [DSA 4531-1] linux security update https://seclists.org/bugtraq/2019/Sep/41 20191108 [slackware-security] Slackware 14.2 kernel (SSA:2019-311-01) https://seclists.org/bugtraq/2019/Nov/11 DSA-4531 https://www.debian.org/security/2019/dsa-4531 FEDORA-2019-15e141c6a7 https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/TRZQQQANZWQMPILZV7OTS3RGGRLLE2Q7/ FEDORA-2019-a570a92d5a https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/YW3QNMPENPFEGVTOFPSNOBL7JEIJS25P/ RHSA-2019:3309 https://access.redhat.com/errata/RHSA-2019:3309 RHSA-2019:3517 https://access.redhat.com/errata/RHSA-2019:3517 RHSA-2019:3978 https://access.redhat.com/errata/RHSA-2019:3978 RHSA-2019:3979 https://access.redhat.com/errata/RHSA-2019:3979 RHSA-2019:4154 https://access.redhat.com/errata/RHSA-2019:4154 RHSA-2019:4256 https://access.redhat.com/errata/RHSA-2019:4256 RHSA-2020:0027 https://access.redhat.com/errata/RHSA-2020:0027 RHSA-2020:0204 https://access.redhat.com/errata/RHSA-2020:0204 USN-4157-1 https://usn.ubuntu.com/4157-1/ USN-4157-2 https://usn.ubuntu.com/4157-2/ USN-4162-1 https://usn.ubuntu.com/4162-1/ USN-4162-2 https://usn.ubuntu.com/4162-2/ USN-4163-1 https://usn.ubuntu.com/4163-1/ USN-4163-2 https://usn.ubuntu.com/4163-2/ [debian-lts-announce] 20190925 [SECURITY] [DLA 1930-1] linux security update https://lists.debian.org/debian-lts-announce/2019/09/msg00025.html [debian-lts-announce] 20191001 [SECURITY] [DLA 1940-1] linux-4.9 security update https://lists.debian.org/debian-lts-announce/2019/10/msg00000.html [oss-security] 20190920 CVE-2019-14821 Kernel: KVM: OOB memory access via mmio ring buffer http://www.openwall.com/lists/oss-security/2019/09/20/1 http://packetstormsecurity.com/files/154951/Kernel-Live-Patch-Security-Notice-LSN-0058-1.html http://packetstormsecurity.com/files/154951/Kernel-Live-Patch-Security-Notice-LSN-0058-1.html http://packetstormsecurity.com/files/155212/Slackware-Security-Advisory-Slackware-14.2-kernel-Updates.html http://packetstormsecurity.com/files/155212/Slackware-Security-Advisory-Slackware-14.2-kernel-Updates.html https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-14821 https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-14821 https://security.netapp.com/advisory/ntap-20191004-0001/ https://security.netapp.com/advisory/ntap-20191004-0001/ https://www.oracle.com/security-alerts/cpuapr2020.html https://www.oracle.com/security-alerts/cpuapr2020.html openSUSE-SU-2019:2307 http://lists.opensuse.org/opensuse-security-announce/2019-10/msg00037.html openSUSE-SU-2019:2308 http://lists.opensuse.org/opensuse-security-announce/2019-10/msg00036.html