CVE-2019-19583

Name: CVE-2019-19583
Creator: NVD / NIST
Published: 2019-12-11T18:16:19.6+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.5/10EPSS 2.15%

Last modified Jun 17, 2026

CVE-2019-19583 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. An issue was discovered in Xen through 4.12.x allowing x86 HVM/PVH guest OS users to cause a denial of service (guest OS crash) because VMX VMEntry checks mishandle a certain case. Please see XSA-260 for background on the MovSS shadow. EPSS estimates a 2.15% chance of exploitation in the next 30 days.

Description

An issue was discovered in Xen through 4.12.x allowing x86 HVM/PVH guest OS users to cause a denial of service (guest OS crash) because VMX VMEntry checks mishandle a certain case. Please see XSA-260 for background on the MovSS shadow. Please see XSA-156 for background on the need for #DB interception. The VMX VMEntry checks do not like the exact combination of state which occurs when #DB in intercepted, Single Stepping is active, and blocked by STI/MovSS is active, despite this being a legitimate state to be in. The resulting VMEntry failure is fatal to the guest. HVM/PVH guest userspace code may be able to crash the guest, resulting in a guest Denial of Service. All versions of Xen are affected. Only systems supporting VMX hardware virtual extensions (Intel, Cyrix, or Zhaoxin CPUs) are affected. Arm and AMD systems are unaffected. Only HVM/PVH guests are affected. PV guests cannot leverage the vulnerability.

Metrics

CVSS 3.1

7.5/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

EPSS Probability

2.15%

79.8th percentile

Probability of exploitation in the next 30 days. Learn more

Affected Software

Vendor	Product	Versions
Xen	Xen	>= 4.8.0, <= 4.12.1
Fedoraproject	Fedora	30
Fedoraproject	Fedora	31
Opensuse	Leap	15.1
Debian	Debian Linux	9.0
Debian	Debian Linux	10.0

References

http://lists.opensuse.org/opensuse-security-announce/2020-01/msg00011.htmlMailing List, Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/34HBFTYNMQMWIO2GGK7DB6KV4M6R5YPV/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/D5R73AYE53QA32KTMHUVKCX6E52CIS43/
https://seclists.org/bugtraq/2020/Jan/21Mailing List, Third Party Advisory
https://security.gentoo.org/glsa/202003-56Third Party Advisory
https://www.debian.org/security/2020/dsa-4602Third Party Advisory
https://xenbits.xen.org/xsa/advisory-308.htmlPatch, Vendor Advisory
http://lists.opensuse.org/opensuse-security-announce/2020-01/msg00011.htmlMailing List, Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/34HBFTYNMQMWIO2GGK7DB6KV4M6R5YPV/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/D5R73AYE53QA32KTMHUVKCX6E52CIS43/
https://seclists.org/bugtraq/2020/Jan/21Mailing List, Third Party Advisory
https://security.gentoo.org/glsa/202003-56Third Party Advisory
https://www.debian.org/security/2020/dsa-4602Third Party Advisory
https://xenbits.xen.org/xsa/advisory-308.htmlPatch, Vendor Advisory

Timeline

Published: Dec 11, 2019
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2019-19583?

How severe is CVE-2019-19583?

CVE-2019-19583 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 2.15% probability of exploitation in the next 30 days.

How do I fix CVE-2019-19583?

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-2019-19583?

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

Scan your code now

Source: NVD / NIST