Incus is a system container and virtual machine manager. Incus instances have an option to provide credentials to systemd in the guest. For containers, this is handled through a shared directory. Prior to version 6.23.0, an attacker can set a configuration key named something like `systemd.credential.../../../../../../root/.bashrc` to cause Incus to write outside of the `credentials` directory associated with the container. This makes use of the fact that the Incus syntax for such credentials is `systemd.credential.XYZ` where `XYZ` can itself contain more periods. While it's not possible to read any data this way, it's possible to write to arbitrary files as root, enabling both privilege escalation and denial of service attacks. Version 6.23.0 fixes the issue.

The remote Fedora 43 host has a package installed that is affected by multiple vulnerabilities as referenced in the FEDORA-2026-094b7621cf advisory.

    Remove incus dependency from incus-agent.

    ----

    Update to [6.23](https://github.com/lxc/incus/releases/tag/v6.23.0)




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

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

There are packages installed that are affected by a vulnerability referenced in the following CVE:

  - Incus is a system container and virtual machine manager. Incus instances have an option to provide
    credentials to systemd in the guest. For containers, this is handled through a shared directory. Prior to
    version 6.23.0, an attacker can set a configuration key named something like
    `systemd.credential.../../../../../../root/.bashrc` to cause Incus to write outside of the `credentials`
    directory associated with the container. This makes use of the fact that the Incus syntax for such
    credentials is `systemd.credential.XYZ` where `XYZ` can itself contain more periods. While it's not
    possible to read any data this way, it's possible to write to arbitrary files as root, enabling both
    privilege escalation and denial of service attacks. Version 6.23.0 fixes the issue. (CVE-2026-33945)

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. Incus instances have an option to provide     credentials to systemd in the guest. For containers, this is handled through a shared directory. Prior to     version 6.23.0, an attacker can set a configuration key named something like     `systemd.credential.../../../../../../root/.bashrc` to cause Incus to write outside of the `credentials`     directory associated with the container. This makes use of the fact that the Incus syntax for such     credentials is `systemd.credential.XYZ` where `XYZ` can itself contain more periods. While it's not     possible to read any data this way, it's possible to write to arbitrary files as root, enabling both     privilege escalation and denial of service attacks. Version 6.23.0 fixes the issue. (CVE-2026-33945)

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

ID	Name	Product	Family	Type	Severity
307511	Fedora 43 : incus (2026-094b7621cf)	Nessus	Fedora Local Security Checks	Local	high
439370	SCA: security update for github.com/lxc/incus/v6 (GHSA-q4q8-7f2j-9h9f)	Tenable Cloud Security	SCA Checks	Local	critical
439370	SCA: security update for github.com/lxc/incus/v6 (GHSA-q4q8-7f2j-9h9f)	Tenable Self-Hosted Container Security	SCA Checks	Local	critical
303969	Linux Distros Unpatched Vulnerability : CVE-2026-33945	Nessus	Misc.	Local	critical

Detections

Analytics

CVE-2026-33945

critical

Tenable Plugins

high

critical

critical

critical