CVE-2018-19966

Name: CVE-2018-19966
Creator: NVD / NIST
Published: 2018-12-08T04:29:00.467+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

UnknownEPSS 0.44%

Last modified Jun 17, 2026

CVE-2018-19966 is a vulnerability of currently unknown severity. An issue was discovered in Xen through 4.11.x allowing x86 PV guest OS users to cause a denial of service (host OS crash) or possibly gain host OS privileges because of an interpretation conflict for a union data structure associated with shadow paging. NOTE: this issue exists because of an incorrect fix for CVE-2017-15595.. EPSS estimates a 0.44% chance of exploitation in the next 30 days.

Description

An issue was discovered in Xen through 4.11.x allowing x86 PV guest OS users to cause a denial of service (host OS crash) or possibly gain host OS privileges because of an interpretation conflict for a union data structure associated with shadow paging. NOTE: this issue exists because of an incorrect fix for CVE-2017-15595.

Metrics

EPSS Probability

0.44%

35.0th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-436

Affected Software

Vendor	Product	Versions
Xen	Xen	>= 4.11.0, <= 4.11.1
Debian	Debian Linux	9.0

References

http://lists.opensuse.org/opensuse-security-announce/2019-04/msg00072.html
http://www.securityfocus.com/bid/106182Third Party Advisory, VDB Entry
https://lists.debian.org/debian-lts-announce/2019/10/msg00008.html
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/UXC6BME7SXJI2ZIATNXCAH7RGPI4UKTT/
https://www.debian.org/security/2019/dsa-4369Third Party Advisory
https://xenbits.xen.org/xsa/advisory-280.htmlMitigation, Patch, Vendor Advisory
http://lists.opensuse.org/opensuse-security-announce/2019-04/msg00072.html
http://www.securityfocus.com/bid/106182Third Party Advisory, VDB Entry
https://lists.debian.org/debian-lts-announce/2019/10/msg00008.html
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/UXC6BME7SXJI2ZIATNXCAH7RGPI4UKTT/
https://www.debian.org/security/2019/dsa-4369Third Party Advisory
https://xenbits.xen.org/xsa/advisory-280.htmlMitigation, Patch, Vendor Advisory

Timeline

Published: Dec 8, 2018
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2018-19966?

How severe is CVE-2018-19966?

Severity scoring for CVE-2018-19966 is pending analysis. The EPSS model estimates a 0.44% probability of exploitation in the next 30 days.

How do I fix CVE-2018-19966?

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-2018-19966?

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

Scan your code now

Source: NVD / NIST