CVE-2026-23954

NameCVE-2026-23954
DescriptionIncus is a system container and virtual machine manager. Versions 6.21.0 and below allow a user with the ability to launch a container with a custom image (e.g a member of the ‘incus’ group) to use directory traversal or symbolic links in the templating functionality to achieve host arbitrary file read, and host arbitrary file write. This ultimately results in arbitrary command execution on the host. When using an image with a metadata.yaml containing templates, both the source and target paths are not checked for symbolic links or directory traversal. This can also be exploited in IncusOS. A fix is planned for versions 6.0.6 and 6.21.0, but they have not been released at the time of publication.
SourceCVE (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 PackageReleaseVersionStatus
incus (PTS)trixie6.0.4-2+deb13u3vulnerable
trixie (security)6.0.4-2+deb13u2vulnerable
forky, sid6.0.5-7vulnerable
lxd (PTS)bookworm, bookworm (security)5.0.2-5+deb12u2vulnerable
trixie5.0.2+git20231211.1364ae4-9+deb13u2vulnerable
trixie (security)5.0.2+git20231211.1364ae4-9+deb13u1vulnerable

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

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
incussource(unstable)(unfixed)
lxdsource(unstable)(unfixed)

Notes

https://github.com/lxc/incus/security/advisories/GHSA-7f67-crqm-jgh7

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