CVE-2017-8903

Name	CVE-2017-8903
Description	Xen through 4.8.x on 64-bit platforms mishandles page tables after an IRET hypercall, which might allow PV guest OS users to execute arbitrary code on the host OS, aka XSA-213.
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-964-1, DSA-3847-1
NVD severity	high (attack range: local)
Debian Bugs	861659

Vulnerable and fixed packages

The table below lists information on source packages.

Source Package	Release	Version	Status
xen (PTS)	jessie (security), jessie	4.4.1-9+deb8u10	fixed
	buster, sid, stretch	4.8.3+comet2+shim4.10.0+comet3-1+deb9u5	fixed
	stretch (security)	4.8.3+xsa262+shim4.10.0+comet3-1+deb9u7	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)	4.8.1-1+deb9u1	high		861659
xen	source	jessie	4.4.1-9+deb8u9	high	DSA-3847-1
xen	source	wheezy	4.1.6.lts1-8	high	DLA-964-1

https://xenbits.xen.org/xsa/advisory-213.html