CVE-2015-8338

Name	CVE-2015-8338
Description	Xen 4.6.x and earlier does not properly enforce limits on page order inputs for the (1) XENMEM_increase_reservation, (2) XENMEM_populate_physmap, (3) XENMEM_exchange, and possibly other HYPERVISOR_memory_op suboperations, which allows ARM guest OS administrators to cause a denial of service (CPU consumption, guest reboot, or watchdog timeout and host reboot) and possibly have unspecified other impact via unknown vectors.
Source	CVE (at NVD; CERT, LWN, oss-sec, fulldisc, bugtraq, EDB, Metasploit, Red Hat, Ubuntu, Gentoo, SuSE, Mageia, GitHub code/issues, web search, more)
References	DSA-3633-1
NVD severity	high (attack range: local)
Debian Bugs	823620

Vulnerable and fixed packages

The table below lists information on source packages.

Source Package	Release	Version	Status
xen (PTS)	wheezy	4.1.4-3+deb7u9	fixed
	wheezy (security)	4.1.6.lts1-8	fixed
	jessie	4.4.1-9+deb8u9	fixed
	jessie (security)	4.4.1-9+deb8u10	fixed
	buster, sid, stretch	4.8.1-1+deb9u1	fixed
	stretch (security)	4.8.1-1+deb9u3	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)	4.8.0~rc3-1	high		823620
xen	source	jessie	4.4.1-9+deb8u6	high	DSA-3633-1
xen	source	squeeze	(not affected)
xen	source	wheezy	(not affected)

Notes

[wheezy] - xen <not-affected> (Only affects Xen on arm)
[squeeze] - xen <not-affected> (Only affects Xen on arm)
http://xenbits.xen.org/xsa/advisory-158.html