MX Linux 25.3 "Infinity" shipped on September 20, 2026 as the third point release of its Debian 13.7-based series, following 25.1 and 25.2. The update refreshes the Xfce, KDE Plasma, and Fluxbox editions with Debian's 6.12.107 LTS kernel, while the Xfce AHS build gains a Liquorix 7.2.6 kernel and Mesa 26.1.4 graphics stack. New MX-specific tools include Verify-iso-sig for cross-distribution ISO signature checks, MX-Theme-Colors, and GUI access to Siduction 7.x kernels, though existing users can pull in all changes through a simple apt full-upgrade.

MX Linux 25.3 "Infinity" ships as third point release of the Debian 13.7-based series

The MX Linux team published the third update in its "Infinity" series on September 20, 2026. It refreshes the Xfce, KDE Plasma, and Fluxbox editions with all Debian 13.7 updates, a new LTS kernel, an updated Mesa graphics stack on newer-hardware builds, and a new cross-distribution ISO signature checker.

MX Linux 25.3 "Infinity" is here, and it's the third point release of the year. It's a point release, so don't expect a flashy feature dump. This is the kind of update that layers the latest Debian security patches and a handful of MX-specific tweaks over the November 2025 base. There's an argument that point releases quietly matter more than the big version bumps, since they're what actually keep your box safe. Existing users don't need to reinstall anything.

MX Linux has long been a distro that flies under the radar but keeps surfacing on distro-watcher charts, and this update is plenty of reason why.

Kernels and graphics

Under the hood, the standard ISOs ship Debian's long-term-supported kernel at version 6.12.107. If you're running newer hardware and want more headroom, the Xfce AHS (Advanced Hardware Support) edition flips to a Liquorix-flavored Linux 7.2.6 kernel. Those AHS builds also get the Mesa 26.1.4 graphics stack, with firmware backported from Debian Sid, the development repository.

The nice part is that you don't need to reformat to grab any of it. An apt full-upgrade pulls in the same updates that the new ISOs carry.

MX-25.1 shipped in January 2026, followed by 25.2 roughly four months later. The team says 25.3 should land on a roughly quarterly cadence within the Infinity series, which itself debuted in November 2025.

MX-specific tooling

Per the announcement, the most tangible novelty is Verify-iso-sig, a utility that checks digital signatures not just for MX ISOs but also for images from many other Linux distros. It's a genuinely useful addition for anyone who mixes distros on a single USB stick, since it collapses several download sites into one verification step.

There's also MX-Theme-Colors, which lets you build custom highlight-color variations off existing MX GTK themes. It won't make headlines, but it spares you a few minutes of hand-editing theme files.

Other updates include a facelift for MX-Welcome, MX-Tools, and custom-toolbox (the latter powers the Fluxbox edition), plus Siduction 7.x kernels dropped into the GUI kernel picker inside MX Package Installer. The third-party VPN installers got updated, and the mx/gazelle-installer now sets the lazytime mount option in /etc/fstab by default on fresh installs. Translation updates rolled out for most MX-Tools, along with refreshed manual and FAQ entries.

The release wraps up every bug-fix, maintenance, and feature change since the previous official ISO. As Dolphin Oracle put it: "The new release includes all Debian updates through Debian 13.7 and all updates from the MX repositories."

The base it builds on

For those who missed the November 2025 launch, MX Linux 25 "Infinity" brought several structural changes that are still in effect. It runs on Debian 13 "Trixie" with Xfce 4.20, KDE Plasma 6.3.x, and Fluxbox 1.3.7. systemd is the default init system, though SysVinit variants remain available for the Xfce and Fluxbox editions.

The installer was redesigned with a "Replace existing installation" option that preserves your home directory, and zram-based swap is now standard. MX Tools fully migrated to Qt6, and the old apt-notifier got replaced by MX-Updater with an optional Nala backend. The KDE edition boots Wayland by default, Xfce switched to Engrampa as its archive manager, and Fluxbox picked up a reworked panel with Audacious replacing DeaDBeeF.

Download details

Direct downloads live on SourceForge, and each ISO comes with a SHA256 checksum, a detached signature, and a signed checksum file. The offerings include MX-25.3_Xfce_x64.iso (standard LTS build), MX-25.3_Xfce_ahs_x64.iso (Liquorix 7.2.6 plus Mesa 26.1.4), MX-25.3_KDE_x64.iso, MX-25.3_fluxbox_x64.iso, and the arm64 Raspberry Pi respin, mx25.3_rpi_respin_arm64.zip.

Head here for the full list. Torrents are also available. Mirrors fill in over time after release.

There's one caveat for Raspberry Pi users. Automatic filesystem expansion on first boot has been dropped from the respin because the previous methods became unreliable. If you're flashing this to a Pi, you'll need to resize the filesystem yourself with raspi-config after the first boot.