Announcing Incus 6.21!

[Stéphane Graber]

Hello,

The Incus team is pleased to announce the release of Incus 6.21!

We’re starting 2026 with a couple of security fixes, but that’s not
all, we’re also introducing some long requested CLI improvements, made
SR-IOV easier to use with network cards, improved startup performance
and more!

The full list of new features for this release of Incus are:

- New “incus wait” command
- Automatic SR-IOV network VF selection
- Support for detaching and disconnecting network interfaces
- Parallel instance startup
- Source subnet restrictions through OIDC claims
- Better DNS SOA handling in network zones
- Forceful (recursive) directory deletion in file REST API

Also includes in this release are two security fixes for high severity
issues affecting shared systems:

- CVE-2026-23953 (Newline injection in environment variable)
- CVE-2026-23954 (Arbitrary file read/write through templates)

You can give Incus a try online:
https://linuxcontainers.org/incus/try-it

Before getting it on your own system:
https://linuxcontainers.org/incus/docs/main/tutorial/first_steps

A detailed release announcement can be found here:
https://discuss.linuxcontainers.org/t/incus-6-21-has-been-released/26005

As well as a video overview of all the new features:
https://www.youtube.com/watch?v=MhF7jgkqqyU

The code can be found on Github:
https://github.com/lxc/incus

And support is done through our community forum and live chat:
https://discuss.linuxcontainers.org

Enjoy!

Stéphane Graber, on behalf of the Incus team.