CVE-2022-42334

Name	CVE-2022-42334
Description	x86/HVM pinned cache attributes mis-handling T[his CNA information record relates to multiple CVEs; the text explains which aspects/vulnerabilities correspond to which CVE.] To allow cachability control for HVM guests with passed through devices, an interface exists to explicitly override defaults which would otherwise be put in place. While not exposed to the affected guests themselves, the interface specifically exists for domains controlling such guests. This interface may therefore be used by not fully privileged entities, e.g. qemu running deprivileged in Dom0 or qemu running in a so called stub-domain. With this exposure it is an issue that - the number of the such controlled regions was unbounded (CVE-2022-42333), - installation and removal of such regions was not properly serialized (CVE-2022-42334).
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-5378-1
Debian Bugs	1033297

Vulnerable and fixed packages

The table below lists information on source packages.

Source Package	Release	Version	Status
xen (PTS)	jessie, jessie (lts)	4.4.4lts5-0+deb8u1	vulnerable
	stretch (security), stretch (lts), stretch	4.8.5.final+shim4.10.4-1+deb9u12	vulnerable
	buster (security), buster, buster (lts)	4.11.4+107-gef32c7afa2-1	vulnerable
	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	Urgency	Origin	Debian Bugs
xen	source	jessie	(unfixed)	end-of-life
xen	source	stretch	(unfixed)	end-of-life
xen	source	buster	(unfixed)	end-of-life
xen	source	bullseye	4.14.5+94-ge49571868d-1		DSA-5378-1
xen	source	(unstable)	4.17.0+74-g3eac216e6e-1			1033297

[buster] - xen <end-of-life> (DSA 4677-1)
https://www.openwall.com/lists/oss-security/2023/03/21/2
https://xenbits.xen.org/xsa/advisory-428.html