CVE-2018-18883

Name: CVE-2018-18883
Creator: NVD / NIST
Published: 2018-11-01T00:29:00.19+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

UnknownEPSS 0.44%

Last modified Jun 17, 2026

CVE-2018-18883 is a vulnerability of currently unknown severity. An issue was discovered in Xen 4.9.x through 4.11.x, on Intel x86 platforms, allowing x86 HVM and PVH guests to cause a host OS denial of service (NULL pointer dereference) or possibly have unspecified other impact because nested VT-x is not properly restricted.. EPSS estimates a 0.44% chance of exploitation in the next 30 days.

Description

An issue was discovered in Xen 4.9.x through 4.11.x, on Intel x86 platforms, allowing x86 HVM and PVH guests to cause a host OS denial of service (NULL pointer dereference) or possibly have unspecified other impact because nested VT-x is not properly restricted.

Metrics

EPSS Probability

0.44%

34.9th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-476

Affected Software

Vendor	Product	Versions
Xen	Xen	>= 4.9.0, <= 4.11.0

References

http://www.securityfocus.com/bid/105817Third Party Advisory, VDB Entry
http://www.securitytracker.com/id/1042021Third Party Advisory, VDB Entry
https://xenbits.xen.org/xsa/advisory-278.htmlMitigation, Patch, Vendor Advisory
http://www.securityfocus.com/bid/105817Third Party Advisory, VDB Entry
http://www.securitytracker.com/id/1042021Third Party Advisory, VDB Entry
https://xenbits.xen.org/xsa/advisory-278.htmlMitigation, Patch, Vendor Advisory

Timeline

Published: Nov 1, 2018
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2018-18883?

How severe is CVE-2018-18883?

Severity scoring for CVE-2018-18883 is pending analysis. The EPSS model estimates a 0.44% probability of exploitation in the next 30 days.

How do I fix CVE-2018-18883?

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-2018-18883?

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

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Source: NVD / NIST