CVE-2019-14821

Published Sep 19, 2019

Last updated 9 months ago

Overview

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.
Source
secalert@redhat.com
NVD status
Analyzed

Risk scores

CVSS 3.1

Type
Primary
Base score
8.8
Impact score
6
Exploitability score
2
Vector string
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
Severity
HIGH

CVSS 3.0

Type
Secondary
Base score
7.5
Impact score
5.8
Exploitability score
1.1
Vector string
CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:C/C:N/I:H/A:H
Severity
HIGH

CVSS 2.0

Type
Primary
Base score
7.2
Impact score
10
Exploitability score
3.9
Vector string
AV:L/AC:L/Au:N/C:C/I:C/A:C

Weaknesses

secalert@redhat.com
CWE-787
nvd@nist.gov
CWE-787

Social media

Hype score
Not currently trending

Configurations

References