CVE-2016-9932

Publication date 26 January 2017

Last updated 25 August 2025

Ubuntu priority

Cvss 3 Severity Score

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.

Read the notes from the security team

Status

Show unmaintained releases

Package	Ubuntu Release	Status
xen	17.04 zesty	Fixed 4.8.0-1ubuntu1
	16.10 yakkety	Fixed 4.7.0-0ubuntu2.1
	16.04 LTS xenial	Fixed 4.6.0-1ubuntu4.3
	14.04 LTS trusty	Fixed 4.4.2-0ubuntu0.14.04.9
	12.04 LTS precise	Fixed 4.1.6.1-0ubuntu0.12.04.13

How can I get the fixes?
What do statuses mean?

Notes

mdeslaur

This is XSA-200

Severity score breakdown

Parameter	Value
Base score	3.3 · Low
Attack vector	Local
Attack complexity	Low
Privileges required	Low
User interaction	None
Scope	Unchanged
Confidentiality	Low
Integrity impact	None
Availability impact	None
Vector	CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N

References

MITRE
NVD
Launchpad
Debian

Other references

https://xenbits.xen.org/xsa/advisory-200.html
https://www.cve.org/CVERecord?id=CVE-2016-9932