CVE-2019-14821
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.
- Score
- CVSS 3.1 8.8 High
- Status
- Modified - secalert@redhat.com
- Published
- 2019-09-19
- Last modified
- 2024-08-05
- Weaknesses
- CWE-787
Affected products
- Ubuntu Linux (Canonical)
- Debian Linux (Debian)
- Fedora (Fedoraproject)
- Kernel (Linux)
- Linux Kernel (Linux)
- Aff A700s Firmware (Netapp)
- Data Availability Services (Netapp)
- H300e Firmware (Netapp)
- H300s Firmware (Netapp)
- H410c Firmware (Netapp)
- H410s Firmware (Netapp)
- H500e Firmware (Netapp)
- H500s Firmware (Netapp)
- H610s Firmware (Netapp)
- H700e Firmware (Netapp)
- H700s Firmware (Netapp)
- Hci Management Node (Netapp)
- Solidfire (Netapp)
- Leap (Opensuse)
- Sd-wan Edge (Oracle)
- Enterprise Linux (Redhat)
- Enterprise Linux Desktop (Redhat)
- Enterprise Linux Eus (Redhat)
- Enterprise Linux For Real Time (Redhat)
- Enterprise Linux Server (Redhat)
- Enterprise Linux Server Aus (Redhat)
- Enterprise Linux Server Tus (Redhat)
- Enterprise Linux Workstation (Redhat)
- Virtualization Host (Redhat)
References
- http://lists.opensuse.org/opensuse-security-announce/2019-10/msg00036.html
- http://lists.opensuse.org/opensuse-security-announce/2019-10/msg00037.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://www.openwall.com/lists/oss-security/2019/09/20/1
- https://access.redhat.com/errata/RHSA-2019:3309
- https://access.redhat.com/errata/RHSA-2019:3517
- https://access.redhat.com/errata/RHSA-2019:3978
- https://access.redhat.com/errata/RHSA-2019:3979
- https://access.redhat.com/errata/RHSA-2019:4154
- https://access.redhat.com/errata/RHSA-2019:4256
- https://access.redhat.com/errata/RHSA-2020:0027
- https://access.redhat.com/errata/RHSA-2020:0204
- https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-14821
- https://lists.debian.org/debian-lts-announce/2019/09/msg00025.html
- https://lists.debian.org/debian-lts-announce/2019/10/msg00000.html
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/TRZQQQANZWQMPILZV7OTS3…
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/YW3QNMPENPFEGVTOFPSNOB…
- https://seclists.org/bugtraq/2019/Nov/11
- https://seclists.org/bugtraq/2019/Sep/41
- https://security.netapp.com/advisory/ntap-20191004-0001/
- https://usn.ubuntu.com/4157-1/
- https://usn.ubuntu.com/4157-2/
- https://usn.ubuntu.com/4162-1/
- https://usn.ubuntu.com/4162-2/
- https://usn.ubuntu.com/4163-1/
- https://usn.ubuntu.com/4163-2/
- https://www.debian.org/security/2019/dsa-4531
- https://www.oracle.com/security-alerts/cpuapr2020.html
