CVE-2018-7540

Name	CVE-2018-7540
Description	An issue was discovered in Xen through 4.10.x allowing x86 PV guest OS users to cause a denial of service (host OS CPU hang) via non-preemptable L3/L4 pagetable freeing.
Source	CVE (at NVD; CERT, LWN, oss-sec, fulldisc, bugtraq, EDB, Metasploit, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, Mageia, GitHub advisories/code/issues, web search, more)
References	DLA-1300-1, DLA-1577-1, DSA-4131-1

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 (security), bullseye	4.14.5+86-g1c354767d5-1	fixed
	bookworm, sid	4.17.0-1	fixed

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

Package	Type	Release	Fixed Version	Origin
xen	source	wheezy	4.1.6.lts1-13	DLA-1300-1
xen	source	jessie	4.4.4lts4-0+deb8u1	DLA-1577-1
xen	source	stretch	4.8.3+comet2+shim4.10.0+comet3-1+deb9u5	DSA-4131-1
xen	source	(unstable)	4.8.3+comet2+shim4.10.0+comet3-1+deb9u5

https://xenbits.xen.org/xsa/advisory-252.html