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 (attack range: local)

Vulnerable and fixed packages

The table below lists information on source packages.

Source Package	Release	Version	Status
xen (PTS)	jessie	4.4.1-9+deb8u10	fixed
	jessie (security)	4.4.4lts4-0+deb8u1	fixed
	stretch, stretch (security)	4.8.5+shim4.10.2+xsa282-1+deb9u11	fixed
	buster, sid	4.11.1+26-g87f51bf366-3	fixed

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

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

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