CVE-2014-7156

Name	CVE-2014-7156
Description	The x86_emulate function in arch/x86/x86_emulate/x86_emulate.c in Xen 3.3.x through 4.4.x does not check the supervisor mode permissions for instructions that generate software interrupts, which allows local HVM guest users to cause a denial of service (guest crash) via unspecified vectors.
Source	CVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)
References	DSA-3041-1

Vulnerable and fixed packages

The table below lists information on source packages.

Source Package	Release	Version	Status
xen (PTS)	buster, buster (security)	4.11.4+107-gef32c7afa2-1	fixed
	bullseye	4.14.6-1	fixed
	bullseye (security)	4.14.5+94-ge49571868d-1	fixed
	bookworm	4.17.1+2-gb773c48e36-1	fixed
	trixie	4.17.2+55-g0b56bed864-1	fixed
	sid	4.17.2+76-ge1f9cb16e2-1	fixed

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

Package	Type	Release	Fixed Version	Urgency	Origin	Debian Bugs
xen	source	squeeze	(unfixed)	end-of-life
xen	source	wheezy	4.1.4-3+deb7u3		DSA-3041-1
xen	source	(unstable)	4.4.1-3