CVE-2018-19961

Name: CVE-2018-19961
Creator: NVD / NIST
Published: 2018-12-08T04:29:00.247+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

UnknownEPSS 0.41%

Last modified Jun 17, 2026

CVE-2018-19961 is a vulnerability of currently unknown severity. An issue was discovered in Xen through 4.11.x on AMD x86 platforms, possibly allowing guest OS users to gain host OS privileges because TLB flushes do not always occur after IOMMU mapping changes.. EPSS estimates a 0.41% chance of exploitation in the next 30 days.

Description

An issue was discovered in Xen through 4.11.x on AMD x86 platforms, possibly allowing guest OS users to gain host OS privileges because TLB flushes do not always occur after IOMMU mapping changes.

Metrics

EPSS Probability

0.41%

32.6th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-459

Affected Software

Vendor	Product	Versions	Update
Xen	Xen	<= 4.11.1	—
Debian	Debian Linux	9.0	—
Citrix	Xenserver	7.0	—
Citrix	Xenserver	7.1	Cu1
Citrix	Xenserver	7.5	—
Citrix	Xenserver	7.6	—

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://support.citrix.com/article/CTX239432Third Party Advisory
https://www.debian.org/security/2019/dsa-4369Third Party Advisory
https://xenbits.xen.org/xsa/advisory-275.htmlPatch, 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://support.citrix.com/article/CTX239432Third Party Advisory
https://www.debian.org/security/2019/dsa-4369Third Party Advisory
https://xenbits.xen.org/xsa/advisory-275.htmlPatch, Vendor Advisory

Timeline

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

Frequently Asked Questions

What is CVE-2018-19961?

An issue was discovered in Xen through 4.11.x on AMD x86 platforms, possibly allowing guest OS users to gain host OS privileges because TLB flushes do not always occur after IOMMU mapping changes.

How severe is CVE-2018-19961?

Severity scoring for CVE-2018-19961 is pending analysis. The EPSS model estimates a 0.41% probability of exploitation in the next 30 days.

How do I fix CVE-2018-19961?

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-2018-19961?

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

Scan your code now

Source: NVD / NIST