CVE-2016-9381

Name	CVE-2016-9381
Description	Race condition in QEMU in Xen allows local x86 HVM guest OS administrators to gain privileges by changing certain data on shared rings, aka a "double fetch" vulnerability.
Source	CVE (at NVD; CERT, LWN, oss-sec, fulldisc, bugtraq, EDB, Metasploit, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, Mageia, GitHub code/issues, web search, more)
References	DLA-720-1
NVD severity	medium

Vulnerable and fixed packages

The table below lists information on source packages.

Source Package	Release	Version	Status
xen (PTS)	stretch (security), stretch	4.8.5.final+shim4.10.4-1+deb9u12	fixed
	buster, buster (security)	4.11.3+24-g14b62ab3e5-1~deb10u1	fixed
	bullseye	4.11.4-1	fixed
	sid	4.11.4+24-gddaaccbbab-1	fixed

The information below is based on the following data on fixed versions.

Package	Type	Release	Fixed Version	Urgency	Origin	Debian Bugs
xen	source	(unstable)	4.4.0-1
xen	source	wheezy	4.1.6.lts1-4		DLA-720-1

Xen switched to qemu-system in 4.4.0-1
https://xenbits.xen.org/xsa/advisory-197.html