Incus 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.

The remote Debian 12 / 13 host has packages installed that are affected by multiple vulnerabilities as referenced in the dsa-6153 advisory.

    - -------------------------------------------------------------------------     Debian Security Advisory DSA-6153-1                   security@debian.org     https://www.debian.org/security/                       Moritz Muehlenhoff     March 01, 2026                        https://www.debian.org/security/faq
    - -------------------------------------------------------------------------

    Package        : lxd     CVE ID         : CVE-2026-23953 CVE-2026-23954

    Two security issues were discovered in LXD, a system container and     virtual machine manager, which could result the in execution of arbitrary     commands via malformed images.

    For the oldstable distribution (bookworm), these problems have been fixed     in version 5.0.2-5+deb12u3.

    For the stable distribution (trixie), these problems have been fixed in     version 5.0.2+git20231211.1364ae4-9+deb13u3.

    We recommend that you upgrade your lxd packages.

    For the detailed security status of lxd please refer to     its security tracker page at:
    https://security-tracker.debian.org/tracker/lxd

    Further information about Debian Security Advisories, how to apply     these updates to your system and frequently asked questions can be     found at: https://www.debian.org/security/

    Mailing list: debian-security-announce@lists.debian.org

Tenable has extracted the preceding description block directly from the Debian security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote Debian 13 host has packages installed that are affected by multiple vulnerabilities as referenced in the dsa-6109 advisory.

    - -------------------------------------------------------------------------     Debian Security Advisory DSA-6109-1                   security@debian.org     https://www.debian.org/security/                       Moritz Muehlenhoff     January 23, 2026                      https://www.debian.org/security/faq
    - -------------------------------------------------------------------------

    Package        : incus     CVE ID         : CVE-2026-23953 CVE-2026-23954

    Two security issues were discovered in Incus, a system container and     virtual machine manager, which could result the in execution of arbitrary     commands via malformed images.

    For the stable distribution (trixie), these problems have been fixed in     version 6.0.4-2+deb13u4.

    We recommend that you upgrade your incus packages.

    For the detailed security status of incus please refer to     its security tracker page at:
    https://security-tracker.debian.org/tracker/incus

    Further information about Debian Security Advisories, how to apply     these updates to your system and frequently asked questions can be     found at: https://www.debian.org/security/

    Mailing list: debian-security-announce@lists.debian.org

Tenable has extracted the preceding description block directly from the Debian security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available.

  - Incus 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. (CVE-2026-23954)

Note that Nessus relies on the presence of the package as reported by the vendor.

ID	Name	Product	Family	Severity
300202	Debian dsa-6153 : golang-github-canonical-lxd-dev - security update	Nessus	Debian Local Security Checks	high
296419	Debian dsa-6109 : golang-github-lxc-incus-dev - security update	Nessus	Debian Local Security Checks	high
296219	Linux Distros Unpatched Vulnerability : CVE-2026-23954	Nessus	Misc.	high

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