CVE-2026-33542

Name	CVE-2026-33542
Description	Incus is a system container and virtual machine manager. Prior to version 6.23.0, a lack of validation of the image fingerprint when downloading from simplestreams image servers opens the door to image cache poisoning and under very narrow circumstances exposes other tenants to running attacker controlled images rather than the expected one. Version 6.23.0 patches the issue.
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)

Vulnerable and fixed packages

The table below lists information on source packages.

Source Package	Release	Version	Status
incus (PTS)	trixie (security), trixie	6.0.4-2+deb13u4	vulnerable
	forky	6.0.6-1	vulnerable
	sid	6.0.6-2	fixed
lxd (PTS)	bookworm	5.0.2-5+deb12u2	vulnerable
	bookworm (security)	5.0.2-5+deb12u3	vulnerable
	trixie (security), trixie	5.0.2+git20231211.1364ae4-9+deb13u3	vulnerable

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

Package	Type	Release	Fixed Version	Urgency	Origin	Debian Bugs
incus	source	(unstable)	6.0.6-2
lxd	source	(unstable)	(unfixed)

https://github.com/lxc/incus/pull/3092
https://github.com/lxc/incus/security/advisories/GHSA-p8mm-23gg-jc9r