Unraid OS 7.4.0-rc.2 Now Available

Unraid 7.4.0-rc.2 is ready for testing ahead of the stable release. This build includes PHP 8.4.27, which patches CVE-2026-109618 and CVE-2026-109619, a pair of critical (CVSS 9.2) unauthenticated remote code execution vulnerabilities in PHP. It also updates the Linux kernel to 6.18.58-Unraid. This is a release candidate, so please install it on a test system- all users on past 7.4.x builds are encouraged to update.

What’s New in rc.2

Updated system packages with security fixes and maintenance updates, including PHP 8.4.27, and a Linux kernel update to 6.18.58-Unraid. The 7.4.0-rc.2 release uses the same base package versions as Unraid OS 7.3.4.

Security

PHP is updated from 8.4.26 in rc.1 to 8.4.27, patching CVE-2026-109618 and CVE-2026-109619. Other notable security-related package updates in rc.2 include:

• curl 8.23.0.
• OpenSSL 3.5.9.
• xorg-server 21.1.25-2.
• nginx 1.30.6-1_SBo_LT.
• libX11, libXi, libXtst, libXpm, libXrender, and libpng.

The cumulative 7.4 changes also validate OpenTerminal inputs before shell commands, display guest-agent network-interface names as text, and anonymize public IPv6 addresses in diagnostics. Community contributions also remove curl -k from public notification agents, restoring certificate verification.

See the full release notes for package versions and CVE details.

Linux Kernel

The Linux kernel advances from 6.18.54-Unraid in rc.1 to 6.18.58-Unraid.

Docker

You can now connect a container to multiple custom networks. Those connections stay in place when you update or recreate the container.

Advanced View adds a memory limit field, giving you control over how much memory each container can use. The Add/Edit form also previews your container’s icon, with a fallback if the image is missing or invalid.

Update checks now support OCI images and refresh local image information. Fixes also prevent repeated attempts to load missing icons, preserve the shared default icon, and display the correct creation date for orphaned images.

Docker Engine is at 29.8.2.

Storage / File Manager

Mover now shows progress and status, so you can see how file transfers are going. It also preserves hard links between files in different subfolders of the same share.

File Manager keeps the source file if a move between shares on different pools or drives fails. Exclusive shares stay under /mnt/user, keeping navigation consistent.

Fixes to the user-share filesystem prevent freezes and a crash that could make shares unavailable.

Drive identification now supports SGPIO/IBPI-capable controllers when SES is unavailable. You can also start an encrypted array by entering a valid passphrase and pressing Enter.

ZFS remains at 2.4.4, rebuilt for the updated Linux kernel.

WebGUI / System

A new task tray brings background plugin, Docker, and virtual machine operations into one place. Queue tasks and reopen them from any browser tab to check progress. Task windows also adjust to your screen size.

Plugin installs now show progress as it happens. Update checks run independently, so one slow plugin no longer holds up the whole page. Plugins with available updates stay at the top, and failed checks show an explanation instead of incorrectly reporting “up to date.”

You can configure your server’s physical power button under Settings > Power Settings > Power Button. These settings also work alongside the Dynamix System Buttons plugin.

Other fixes

• License checks retry after temporary connection problems.
• Stopped arrays show their offline status instead of 100% utilization.
• Boot-device space usage remains visible when the array is stopped.

Networking / Hardware

The 7.4 series expands Intel, MediaTek, and Realtek wireless support, including RTW88 8812A/8814A/8821A and RTW89 8851BU/8852BU. It adds controller, sensor, and audio-codec support, provides the optional netconsole module, and aligns network defaults with Fedora’s sysctl baseline.

Virtualization

Unraid 7.4 adds support for running under Hyper-V, including drivers for storage, memory management, keyboards, and communication with the host.

This release also fixes an unnecessary warning during VM startup.

Unraid API

dynamix.unraid.net is at 4.37.5-2. See the Unraid API changelog.

Base Distro

This release updates the underlying system packages with security fixes and maintenance improvements. It uses the same base package versions as Unraid OS 7.3.4. Compared with Unraid OS 7.3.2, it includes 319 package updates, 1 added package, and 1 downgraded package.

See the full release notes for the complete package list.

Known Issues

For known issues from the previous release, see the Unraid OS 7.3.2 release notes.

Rolling Back

No new release-specific rollback warnings are documented. For earlier rollback guidance, see the Unraid OS 7.3.2 release notes.

Community contributions

• Thanks to junkerderprovinz for live plugin-install progress
• Mainfrezzer for the registry User-Agent and OCI support
• Joly0 for the Docker fallback-loop fix
• chodeus for the shared-icon and orphan-image date fixes
• Sacred-Shadow for removing curl -k from public notification agents