CVE-2026-9639

Name	CVE-2026-9639
Description	Nil-pointer dereference in CreateCustomVolumeFromBackup in LXD up to version 6.8 and 5.21 on Linux allows an authenticated user with can_create_storage_volumes permissions to cause a denial of service via a specially crafted custom-volume backup tarball that omits the expires_at snapshot field.
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-6373-1

Vulnerable and fixed packages

The table below lists information on source packages.

Source Package	Release	Version	Status
lxd (PTS)	bookworm, bookworm (security)	5.0.2-5+deb12u6	vulnerable
	trixie	5.0.2+git20231211.1364ae4-9+deb13u6	vulnerable
	trixie (security)	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	Debian Bugs
lxd	source	trixie	5.0.2+git20231211.1364ae4-9+deb13u7		DSA-6373-1
lxd	source	(unstable)	(unfixed)

Notes

https://github.com/canonical/lxd/security/advisories/GHSA-j93m-3j9p-m5m8
https://github.com/canonical/lxd/pull/18320
https://github.com/canonical/lxd/pull/18390