CVE-2016-9932

Name: CVE-2016-9932
Creator: NVD / NIST
Published: 2017-01-26T15:59:00.407+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

UnknownEPSS 0.42%

Last modified Jun 17, 2026

CVE-2016-9932 is a vulnerability of currently unknown severity. CMPXCHG8B emulation in Xen 3.3.x through 4.7.x on x86 systems allows local HVM guest OS users to obtain sensitive information from host stack memory via a "supposedly-ignored" operand size prefix.. EPSS estimates a 0.42% chance of exploitation in the next 30 days.

Description

CMPXCHG8B emulation in Xen 3.3.x through 4.7.x on x86 systems allows local HVM guest OS users to obtain sensitive information from host stack memory via a "supposedly-ignored" operand size prefix.

Metrics

EPSS Probability

0.42%

33.9th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-200

Affected Software

Vendor	Product	Versions
Xen	Xen	3.3.0
Xen	Xen	3.3.1
Xen	Xen	3.3.2
Xen	Xen	3.4.0
Xen	Xen	3.4.1
Xen	Xen	3.4.2
Xen	Xen	3.4.3
Xen	Xen	3.4.4
Xen	Xen	4.0.0
Xen	Xen	4.0.1
Xen	Xen	4.0.2
Xen	Xen	4.0.3
Xen	Xen	4.0.4
Xen	Xen	4.1.0
Xen	Xen	4.1.1
Xen	Xen	4.1.2
Xen	Xen	4.1.3
Xen	Xen	4.1.4
Xen	Xen	4.1.5
Xen	Xen	4.1.6
Xen	Xen	4.1.6.1
Xen	Xen	4.2.0
Xen	Xen	4.2.1
Xen	Xen	4.2.2
Xen	Xen	4.2.3
Xen	Xen	4.2.4
Xen	Xen	4.2.5
Xen	Xen	4.3.0
Xen	Xen	4.3.1
Xen	Xen	4.3.2
Xen	Xen	4.3.3
Xen	Xen	4.3.4
Xen	Xen	4.4.0
Xen	Xen	4.4.1
Xen	Xen	4.4.2
Xen	Xen	4.4.3
Xen	Xen	4.4.4
Xen	Xen	4.5.0
Xen	Xen	4.5.1
Xen	Xen	4.5.2
Xen	Xen	4.5.3
Xen	Xen	4.5.5
Xen	Xen	4.6.0
Xen	Xen	4.6.3
Xen	Xen	4.7.0

References

http://www.debian.org/security/2017/dsa-3847
http://www.securityfocus.com/bid/94863Third Party Advisory, VDB Entry
http://www.securitytracker.com/id/1037468Third Party Advisory, VDB Entry
http://xenbits.xen.org/xsa/advisory-200.htmlPatch, Vendor Advisory
https://security.gentoo.org/glsa/201612-56
https://support.citrix.com/article/CTX219378Vendor Advisory
http://www.debian.org/security/2017/dsa-3847
http://www.securityfocus.com/bid/94863Third Party Advisory, VDB Entry
http://www.securitytracker.com/id/1037468Third Party Advisory, VDB Entry
http://xenbits.xen.org/xsa/advisory-200.htmlPatch, Vendor Advisory
https://security.gentoo.org/glsa/201612-56
https://support.citrix.com/article/CTX219378Vendor Advisory

Timeline

Published: Jan 26, 2017
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2016-9932?

CMPXCHG8B emulation in Xen 3.3.x through 4.7.x on x86 systems allows local HVM guest OS users to obtain sensitive information from host stack memory via a "supposedly-ignored" operand size prefix.

How severe is CVE-2016-9932?

Severity scoring for CVE-2016-9932 is pending analysis. The EPSS model estimates a 0.42% probability of exploitation in the next 30 days.

How do I fix CVE-2016-9932?

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-2016-9932?

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

Scan your code now

Source: NVD / NIST