CVE-2018-5244

Name: CVE-2018-5244
Creator: NVD / NIST
Published: 2018-01-05T18:29:00.247+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

UnknownEPSS 0.37%

Last modified Jun 17, 2026

CVE-2018-5244 is a vulnerability of currently unknown severity. 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. EPSS estimates a 0.37% chance of exploitation in the next 30 days.

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.

Metrics

EPSS Probability

0.37%

28.9th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-119

Affected Software

Vendor	Product	Versions
Xen	Xen	>= 4.10.0

References

http://www.securityfocus.com/bid/102433Third Party Advisory, VDB Entry
http://www.securitytracker.com/id/1040774
https://security.gentoo.org/glsa/201810-06
https://xenbits.xen.org/xsa/advisory-253.htmlIssue Tracking, Mitigation, Vendor Advisory
http://www.securityfocus.com/bid/102433Third Party Advisory, VDB Entry
http://www.securitytracker.com/id/1040774
https://security.gentoo.org/glsa/201810-06
https://xenbits.xen.org/xsa/advisory-253.htmlIssue Tracking, Mitigation, Vendor Advisory

Timeline

Published: Jan 5, 2018
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2018-5244?

How severe is CVE-2018-5244?

Severity scoring for CVE-2018-5244 is pending analysis. The EPSS model estimates a 0.37% probability of exploitation in the next 30 days.

How do I fix CVE-2018-5244?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2018-5244?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST