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 bugzilla/CVE, Mageia, GitHub code/issues, web search, more)
References	DSA-3633-1
NVD severity	high
Debian Bugs	823620

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+24-gddaaccbbab-1~deb10u1	fixed
	buster (security)	4.11.4+37-g3263f257ca-1	fixed
	bullseye	4.11.4+24-gddaaccbbab-1	fixed
	sid	4.14.0+80-gd101b417b7-1	fixed

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

Package	Type	Release	Fixed Version	Origin	Debian Bugs
xen	source	squeeze	(not affected)
xen	source	wheezy	(not affected)
xen	source	jessie	4.4.1-9+deb8u6	DSA-3633-1
xen	source	(unstable)	4.8.0~rc3-1		823620

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