CVE-2022-42321

Name	CVE-2022-42321
Description	Xenstore: Guests can crash xenstored via exhausting the stack Xenstored is using recursion for some Xenstore operations (e.g. for deleting a sub-tree of Xenstore nodes). With sufficiently deep nesting levels this can result in stack exhaustion on xenstored, leading to a crash of xenstored.
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	DSA-5272-1

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	vulnerable
	bullseye (security), bullseye	4.14.5+94-ge49571868d-1	fixed
	bookworm, sid	4.17.1+2-gb773c48e36-1	fixed

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

Package	Type	Release	Fixed Version	Urgency	Origin
xen	source	buster	(unfixed)	end-of-life
xen	source	bullseye	4.14.5+86-g1c354767d5-1		DSA-5272-1
xen	source	(unstable)	4.16.2+90-g0d39a6d1ae-1

[buster] - xen <end-of-life> (DSA 4677-1)
https://xenbits.xen.org/xsa/advisory-418.html