CVE-2017-17563

Name	CVE-2017-17563
Description	An issue was discovered in Xen through 4.9.x allowing guest OS users to cause a denial of service (host OS crash) or gain host OS privileges by leveraging an incorrect mask for reference-count overflow checking in shadow mode.
Source	CVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)
References	DLA-1230-1, DLA-1549-1, DSA-4112-1

Vulnerable and fixed packages

The table below lists information on source packages.

Source Package	Release	Version	Status
xen (PTS)	bullseye	4.14.6-1	fixed
	bullseye (security)	4.14.5+94-ge49571868d-1	fixed
	bookworm	4.17.3+10-g091466ba55-1~deb12u1	fixed
	sid, trixie	4.17.3+36-g54dacb5c02-1	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.lts1-11	DLA-1230-1
xen	source	jessie	4.4.4lts2-0+deb8u1	DLA-1549-1
xen	source	stretch	4.8.3+comet2+shim4.10.0+comet3-1+deb9u4.1	DSA-4112-1
xen	source	(unstable)	4.8.3+comet2+shim4.10.0+comet3-1+deb9u5

https://xenbits.xen.org/xsa/advisory-249.html