CVE-2018-18883

Name	CVE-2018-18883
Description	An issue was discovered in Xen 4.9.x through 4.11.x, on Intel x86 platforms, allowing x86 HVM and PVH guests to cause a host OS denial of service (NULL pointer dereference) or possibly have unspecified other impact because nested VT-x is not properly restricted.
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	high

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+57-g41a822c392-2	fixed
	buster (security)	4.11.4+99-g8bce4698f6-1	fixed
	bullseye, sid	4.14.1+11-gb0b734a8b3-1	fixed

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

Package	Type	Release	Fixed Version
xen	source	jessie	(not affected)
xen	source	stretch	(not affected)
xen	source	(unstable)	4.11.1-1

Notes

[stretch] - xen <not-affected> (Only affects 4.9 and later)
[jessie] - xen <not-affected> (Only affects 4.9 and later)
https://xenbits.xen.org/xsa/advisory-278.txt