Rapid7 Vulnerability & Exploit Database

Centos Linux: CVE-2019-14821: Important: kernel-rt security and bug fix update (Multiple Advisories)

Back to Search

Centos Linux: CVE-2019-14821: Important: kernel-rt security and bug fix update (Multiple Advisories)

Severity
7
CVSS
(AV:L/AC:L/Au:N/C:C/I:C/A:C)
Published
09/19/2019
Created
11/07/2019
Added
11/06/2019
Modified
03/03/2021

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.

Solution(s)

  • centos-upgrade-kernel
  • centos-upgrade-kernel-rt
  • centos-upgrade-kpatch-patch-3_10_0-1062
  • centos-upgrade-kpatch-patch-3_10_0-1062-debuginfo
  • centos-upgrade-kpatch-patch-3_10_0-1062_1_1
  • centos-upgrade-kpatch-patch-3_10_0-1062_1_1-debuginfo
  • centos-upgrade-kpatch-patch-3_10_0-1062_1_2
  • centos-upgrade-kpatch-patch-3_10_0-1062_1_2-debuginfo
  • centos-upgrade-kpatch-patch-3_10_0-1062_4_1
  • centos-upgrade-kpatch-patch-3_10_0-1062_4_1-debuginfo
  • centos-upgrade-kpatch-patch-3_10_0-1062_4_2
  • centos-upgrade-kpatch-patch-3_10_0-1062_4_3

With Rapid7 live dashboards, I have a clear view of all the assets on my network, which ones can be exploited, and what I need to do in order to reduce the risk in my environment in real-time. No other tool gives us that kind of value and insight.

– Scott Cheney, Manager of Information Security, Sierra View Medical Center

;