EUVD-2026-16492
CVSS Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
Lifecycle Timeline
4Description
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.
Analysis
Path traversal in Incus system container manager allows authenticated remote attackers to write arbitrary files as root on the host via malformed systemd credential configuration keys. Affecting all versions before 6.23.0, this enables both privilege escalation from container to host and denial of service through critical file overwrites. …
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Remediation
Within 24 hours: Verify all Incus installations in your environment and document versions (vulnerable: <6.23.0). Assess whether untrusted users have container access. …
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External POC / Exploit Code
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