CVE-2026-62433

Name	CVE-2026-62433
Description	Parts of the DM_OP handling code assumes the caller has provided the required number of buffers for the given operation without any checking being done. As a result, certain operations might access stack rubble as structures are possibly uninitialized.
Source	CVE (at NVD; CERT, ENISA, LWN, oss-sec, fulldisc, Debian ELTS, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)
References	DSA-6424-1

Vulnerable and fixed packages

The table below lists information on source packages.

Source Package	Release	Version	Status
xen (PTS)	bookworm, bookworm (security)	4.17.5+72-g01140da4e8-1	vulnerable
	trixie	4.20.2+37-g61ff35323e-0+deb13u1	vulnerable
	trixie (security)	4.20.3+127-gc42374a105-0+deb13u1	fixed
	forky, sid	4.20.3+127-gc42374a105-1	fixed

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

Package	Type	Release	Fixed Version	Urgency	Origin
xen	source	bullseye	(unfixed)	end-of-life
xen	source	trixie	4.20.3+127-gc42374a105-0+deb13u1		DSA-6424-1
xen	source	(unstable)	4.20.3+127-gc42374a105-1

[bullseye] - xen <end-of-life> (out of LTS support)
https://xenbits.xen.org/xsa/advisory-506.html