CVE-2026-28384

Name	CVE-2026-28384
Description	An improper sanitization of the compression_algorithm parameter in Canonical LXD allows an authenticated, unprivileged user to execute commands as the LXD daemon on the LXD server via API calls to the image and backup endpoints. This issue affected LXD from 4.12 through 6.6 and was fixed in the snap versions 5.0.6-e49d9f4 (channel 5.0/stable), 5.21.4-1374f39 (channel 5.21/stable), and 6.7-1f11451 (channel 6.0 stable). The channel 4.0/stable is not affected as it contains version 4.0.10.
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	7.0.0-5	fixed
	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)	6.0.6-1
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/canonical/lxd/security/advisories/GHSA-4rmf-rcp8-2r9g
https://github.com/canonical/lxd/pull/17820
https://github.com/lxc/incus/pull/2972