Detections
Analytics
CVE-2019-14821
high
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.
References
https://www.oracle.com/security-alerts/cpuapr2020.html
https://www.debian.org/security/2019/dsa-4531
https://usn.ubuntu.com/4163-2/
https://usn.ubuntu.com/4163-1/
https://usn.ubuntu.com/4162-2/
https://usn.ubuntu.com/4162-1/
https://usn.ubuntu.com/4157-2/
https://usn.ubuntu.com/4157-1/
https://security.netapp.com/advisory/ntap-20191004-0001/
https://seclists.org/bugtraq/2019/Sep/41
https://seclists.org/bugtraq/2019/Nov/11
https://lists.debian.org/debian-lts-announce/2019/10/msg00000.html
https://lists.debian.org/debian-lts-announce/2019/09/msg00025.html
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-14821
https://access.redhat.com/errata/RHSA-2020:0204
https://access.redhat.com/errata/RHSA-2020:0027
https://access.redhat.com/errata/RHSA-2019:4256
https://access.redhat.com/errata/RHSA-2019:4154
https://access.redhat.com/errata/RHSA-2019:3979
https://access.redhat.com/errata/RHSA-2019:3978
https://access.redhat.com/errata/RHSA-2019:3517
https://access.redhat.com/errata/RHSA-2019:3309
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://lists.opensuse.org/opensuse-security-announce/2019-10/msg00037.html
http://lists.opensuse.org/opensuse-security-announce/2019-10/msg00036.html