CVE-2026-48750

Name	CVE-2026-48750
Description	Incus is a system container and virtual machine manager. Prior to version 7.2.0, the `record-output` parameter of the `/instances/$name/exec` endpoint stores the output of the command in the `exec-output` directory of the instance. If `exec-output` is a symlink, file named `exec_UUID.stdout` and `exec_UUID.stderr` can be written to an arbitrary location where the `.stdout` file will contain arbitrary content. This behavior can be abused for arbitrary command execution. Version 7.2.0 contains a patch.
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-6370-1, DSA-6373-1

Vulnerable and fixed packages

The table below lists information on source packages.

Source Package	Release	Version	Status
incus (PTS)	trixie	6.0.4-2+deb13u8	fixed
	trixie (security)	6.0.4-2+deb13u9	fixed
	forky, sid	7.0.1-2	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+deb13u8		DSA-6370-1
incus	source	(unstable)	7.0.0-5
lxd	source	bookworm	(unfixed)	end-of-life
lxd	source	trixie	5.0.2+git20231211.1364ae4-9+deb13u7		DSA-6373-1
lxd	source	(unstable)	(unfixed)

Notes

[bookworm] - lxd <end-of-life> (EOL in bookworm LTS)
https://github.com/lxc/incus/security/advisories/GHSA-73hr-m85f-64v9
https://github.com/canonical/lxd/pull/18590