CVE-2016-6259

Name	CVE-2016-6259
Description	Xen 4.5.x through 4.7.x do not implement Supervisor Mode Access Prevention (SMAP) whitelisting in 32-bit exception and event delivery, which allows local 32-bit PV guest OS kernels to cause a denial of service (hypervisor and VM crash) by triggering a safety check.
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)
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	4.11.4+37-g3263f257ca-1	fixed
	buster (security)	4.11.4+57-g41a822c392-2	fixed
	bullseye, sid	4.14.0+88-g1d1d1f5391-2	fixed

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

Package	Type	Release	Fixed Version
xen	source	wheezy	(not affected)
xen	source	jessie	(not affected)
xen	source	(unstable)	4.8.0~rc3-1

Notes

[jessie] - xen <not-affected> (Only affects 4.5 and later)
[wheezy] - xen <not-affected> (Only affects 4.5 and later)
http://xenbits.xen.org/xsa/advisory-183.html