CVE-2015-8553

Name	CVE-2015-8553
Description	Xen allows guest OS users to obtain sensitive information from uninitialized locations in host OS kernel memory by not enabling memory and I/O decoding control bits. NOTE: this vulnerability exists because of an incomplete fix for CVE-2015-0777.
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-4497-1

Vulnerable and fixed packages

The table below lists information on source packages.

Source Package	Release	Version	Status
linux (PTS)	jessie, jessie (lts)	3.16.84-1	vulnerable
	stretch (security)	4.9.320-2	fixed
	stretch (lts), stretch	4.9.320-3	fixed
	buster (security), buster, buster (lts)	4.19.316-1	fixed
	bullseye	5.10.223-1	fixed
	bullseye (security)	5.10.226-1	fixed
	bookworm	6.1.115-1	fixed
	bookworm (security)	6.1.119-1	fixed
	trixie	6.12.5-1	fixed
	sid	6.12.6-1	fixed

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

Package	Type	Release	Fixed Version	Origin
linux	source	stretch	4.9.168-1+deb9u5	DSA-4497-1
linux	source	(unstable)	4.19.37-1
linux-2.6	source	(unstable)	(unfixed)

Notes

[jessie] - linux <ignored> (Intrusive; breaks qemu as used in Jessie; cf. kernel-sec for more details)
[wheezy] - linux <ignored> (Intrusive; breaks qemu as used in Wheezy; cf. kernel-sec for more details)
[squeeze] - linux-2.6 <no-dsa> (Xen not supported in Squeeze LTS)
CVE for the incomplete patches from XSA-120 and supplied in
XSA-120 v5+ addendum patch.
Cf. https://bugzilla.redhat.com/show_bug.cgi?id=1289128#c2
http://xenbits.xen.org/xsa/advisory-120.html
Patch is discussed in http://thread.gmane.org/gmane.comp.emulators.xen.devel/140440/focus=140441
and http://thread.gmane.org/gmane.linux.kernel/1924087/focus=1924088
https://git.kernel.org/linus/7681f31ec9cdacab4fd10570be924f2cef6669ba