It is built on the security-first pipeline behind Project Hummingbird<\/a>‘s existing container catalog<\/a>, with the foundational project itself being something Red Hat introduced as an early access program for subscribers back in November 2025<\/a>.<\/p>\n The main idea behind the project is to ship a catalog of minimal, hardened, distroless container images kept at near-zero CVE status. When a vulnerability gets patched upstream, the build pipeline finds it, rebuilds the affected image, and ships it.<\/p>\n Fedora Hummingbird is applying the same logic but to a full-size operating system, using a Konflux<\/a>-based build pipeline, drawing over 95% of packages from Fedora Rawhide.<\/p>\n Whatever Rawhide doesn’t have yet gets pulled from upstream, and any fixes made along the way feed back into Fedora. <\/p>\n Moreover, Red Hat’s Product Security team maintains a vulnerability feed for each package<\/strong>, so instead of a generic CVE list, you get a clearer picture of what actually affects your setup.<\/p>\n The kernel powering it is the Always Ready Kernel<\/a> (ARK) from the CKI project, which follows mainline Linux and already ships in Fedora. And, to wrap up, all updates are atomic with rollback support<\/strong>, the root filesystem is read-only, and writable state stays in If you’re already running Silverblue, Kinoite, or any of the other Fedora Atomic Desktops<\/a>, then the “immutable OS<\/em>” moniker might feel familiar to you. But Hummingbird and those are not the same thing.<\/p>\n Fedora’s existing Atomic Desktops are rpm-ostree-based<\/em> desktop variants built from the standard Fedora<\/a> package set, released on Fedora’s regular six-month cycle.<\/p>\n They are built for end users who want a stable, immutable desktop experience.<\/p>\n Fedora Hummingbird ships no desktop environment<\/strong> and is a rolling release<\/a> that tracks Fedora Rawhide<\/a> directly, built through its own dedicated pipeline where every package carries independent CVE tracking and its own lifecycle.<\/p>\n The target here is developers and cloud-native workloads, not the desktop market.<\/p>\n The image is available to download<\/a> for the x86_64<\/em> and aarch64<\/em> platforms with no subscription or registration required<\/strong>. The project’s source code lives on GitLab<\/a>, and is open for contributions.<\/p>\n The download page also has step-by-step instructions for spinning up a virtual machine.<\/p>\n\/var<\/code> and \/etc<\/code>.<\/p>\nHow’s it different from Fedora Atomic?<\/h2>\n
Download Fedora Hummingbird<\/h2>\n
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