uCore is an OCI image of Fedora CoreOS with "batteries included". More specifically, it's an opinionated, custom CoreOS image, built daily with some common tools added in. The idea is to make a lightweight server image including commonly used services or the building blocks to host them.
Kernel version 6.11.3 was the previous stable update's kernel, and despite the update to Fedora 41, we've stuck with 6.11.3 rather than updating to 6.11.5 from upstream.
This is due to a kernel bug in versions 6.11.4/6.11.5 which breaks tailscale status reporting. As many users of uCore do use tailscale, we've decided to be extra cautious and hold back the kernel, even though the rest of stable updated as usual.
We expect the next update of Fedora CoreOS to be on 6.11.6 per the current state of the testing stream. So uCore will follow when that update occurs.
This was previously named fedora-coreos-zfs, but that version of the image did not offer the nvidia option. If on the previous image name, please rebase with rpm-ostree rebase.