Unraid OS 7.3.0 comes with critical security updates and a setup wizard redesign

Although based on a Linux core, Unraid is a proprietary operating system that targets home servers that are being used as NAS devices, app servers, media servers, or virtualization hosts. The base system can be improved with the help of plugins and Docker applications. This piece of code has been around for over two decades, is based on Slackware, and the latest update, which arrived yesterday, is labeled 7.3.0.

Unraid OS 7.3.0 is a stable release that updates the licensing approach. Until now, Unraid booted and had its license validated using flash drives. With this update, the system can be installed and booted from external NVMe, SSD, eMMC, or existing storage devices. Internal boot also supports a mirrored boot pool, namely two devices in a ZFS mirror. Existing users who move to internal boot can go with flash licensing or TPM-based licensing.

The list of other changes worth mentioning includes the following:

• A completely redesigned onboarding wizard that requires about three minutes to get a server ready to go.
• Several security fixes, including patches for Copy Fail (CVE-2026-31431) and Dirty Frag (CVE-2025-43284).
• Docker 29.4.3 replaces version 29.3.1, offering a new optional fixed MAC address field in templates.
• ZFS 2.4.1 is an update that comes alongside the ability to view corrupt files in the WebGUI, as well as ZFS ARC maximum size in the shape of a user-facing control, which can be found in Settings>Disk Settings>Tunable(zfs_arc_max).
• Performance improvements for the file manager.
• QEMU updated to 10.2.2, and libvirt to 12.2.0.
• Broader AMD XDNA and ACP support in the kernel.
• In addition to the above, the WebGUI and system also received plenty of small tweaks and fixes, most of them with an impact on the reliability and speed of the system.

While prebuilt servers can be acquired, those are usually not cheap. However, those who want to run Unraid OS on their own hardware can go with the $49 Starter license, which includes support for up to 6 storage devices and one year of updates; the $109 Unleashed version (unlimited devices, but still one year of updates); Lifetime (everything unlimited for a one-time payment of $249).

Back to the prebuilt servers, we should mention that Amazon is currently offering the LincStation S1 with Unraid OS included for just $499.