The LXD 5.21/stable channel is being updated to include interim fixes since the LXD 5.21.4 LTS interim snap release 5.21.4-8caf727.
It is available as snap version: 5.21.4-1374f39 (2026-03-11) in the 5.21/stable channel.
This release includes fixes for security issues:
- Authenticated host RCE via unsanitized compression_algorithm in image and backup API endpoints (CVE-2026-28384)
- Bundled QEMU version bumped to
8.2.2+ds-0ubuntu1.13.