# LXD 5.21.7 release notes This is a [LTS release](https://canonical.com/lxd/docs/default/reference/releases-snap/index.html.md#ref-releases-lts) and is recommended for production use. This is a maintenance release for the 5.21 LTS series. It includes documentation improvements and dependency updates. ## Highlights This section highlights new and improved features in this release. ### Enhanced documentation tooling with LLM support An automated Sphinx extension (`sphinx-llm`) has been added to generate `llms.txt` and `llms-full.txt` files from the documentation. These files make it easier for Large Language Models to work with the LXD documentation. - Documentation: [sphinx-llm](https://sphinx-llms-txt.readthedocs.io/) ## Bug fixes The following bug fixes are included in this release. - [Instance template path traversal allows arbitrary host file write as root (CVE-2026-66897)](https://github.com/canonical/lxd/security/advisories/GHSA-q39m-8fx9-42fv) - [Prevent a panic when creating a custom volume snapshot without an expiry date](https://github.com/canonical/lxd/commit/625e859869a14642fcc33534ae9c4372aa125909) ## Snap packaging changes - QEMU was bumped to version 8.2.2+ds-0ubuntu1.18. - NVIDIA Container and NVIDIA Container Toolkit were bumped to version 1.20.0. - EDK2 Secure Boot variable generation now uses `python3-virt-firmware` instead of a QEMU virtual machine during snap builds. ## Change log View the [complete list of all changes in this release](https://github.com/canonical/lxd/compare/lxd-5.21.6...lxd-5.21.7). ## Downloads The source tarballs and binary clients can be found on our [download page](https://github.com/canonical/lxd/releases/tag/lxd-5.21.7). Binary packages are also available for: - **Linux:** `snap install lxd --channel=5.21/stable` - **macOS client:** `brew install lxc` - **Windows client:** `choco install lxc`