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)
References	DSA-6184-1, DSA-6188-1

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+deb13u8	fixed
	forky, sid	7.0.1-1	fixed
lxd (PTS)	bookworm, bookworm (security)	5.0.2-5+deb12u6	vulnerable
	trixie (security), trixie	5.0.2+git20231211.1364ae4-9+deb13u7	fixed

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

Package	Type	Release	Fixed Version	Urgency	Origin
incus	source	trixie	6.0.4-2+deb13u5		DSA-6184-1
incus	source	(unstable)	6.0.6-2
lxd	source	bookworm	(unfixed)	end-of-life
lxd	source	trixie	5.0.2+git20231211.1364ae4-9+deb13u4		DSA-6188-1
lxd	source	(unstable)	(unfixed)

Notes

[bookworm] - lxd <end-of-life> (EOL in bookworm LTS)
https://github.com/lxc/incus/pull/3092
https://github.com/lxc/incus/security/advisories/GHSA-p8mm-23gg-jc9r