CVE-2018-5244

MEDIUM

Xen >=4.10.0 - Denial of Service via MSR Emulation Tracking Structure

Title source: llm

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.

References (4)

Core 4

Core References

Third Party Advisory vendor-advisory x_refsource_gentoo

https://security.gentoo.org/glsa/201810-06

Third Party Advisory, VDB Entry vdb-entry x_refsource_bid

http://www.securityfocus.com/bid/102433

Issue Tracking, Mitigation, Vendor Advisory x_refsource_confirm

https://xenbits.xen.org/xsa/advisory-253.html

Third Party Advisory, VDB Entry vdb-entry x_refsource_sectrack

http://www.securitytracker.com/id/1040774

Scores

CVSS v3 6.5

EPSS 0.0006

EPSS Percentile 18.5%

Attack Vector LOCAL

CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H

Details

CWE

CWE-119

Status published

Products (1)

xen/xen 4.10.0

Published Jan 05, 2018

Tracked Since Feb 18, 2026