CVE-2018-5244

6.5 mediumEPSS 0.4%

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.

Severity

CVSS 3.0

6.5 medium

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

EPSS: 0.4% chance of exploitation in the next 30 days; higher than 31% of CVEs (scores of 2026-10-31)
CWE: CWE-119
Published: 2018-01-05
Modified: 2026-06-17
Record from: the NVD, synced 2026-10-19

Affected

xen:xen

References

http://www.securityfocus.com/bid/102433
http://www.securitytracker.com/id/1040774
https://security.gentoo.org/glsa/201810-06
https://xenbits.xen.org/xsa/advisory-253.html
http://www.securityfocus.com/bid/102433

Check your stack JSON