VULNERABILITY INTELLIGENCE

CVE-2018-5244

CVSS score6.5 MEDIUM
EPSS probability0.37%
CISA KEVNot currently listed
Published2018-01-05
Last modified2026-06-17
CVSS vectorCVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H

Description

In Xen 4.10, new infrastructure was introduced as part of an overhaul to how MSR emulation happens for guests. Unfortunately, one tracking structure isn't freed when a vcpu is destroyed. This allows guest OS administrators to cause a denial of service (host OS memory consumption) by rebooting many times.

Weakness classification

  • CWE-119: Improper Restriction of Operations within the Bounds of a Memory Buffer

Primary references