Canonical's Ubuntu Core 26 offers 15-year support and immutable security for IoT

Canonical has released Ubuntu Core 26, its latest long-term support (LTS) distribution tailored for IoT, edge computing, and mission-critical AI workloads. The stripped-down, containerized OS uses sandboxed snaps for all components, ensuring a measured boot chain that only runs verified code. With 15 years of support extending to 2041, Ubuntu Core is positioned as a hardened Linux for devices that must run unattended for years. This aligns with emerging regulations like the EU Cyber Resilience Act (CRA), which demands component provenance and long-term accountability. Canonical's VP of Ubuntu Engineering emphasized that Core 26 provides the foundation for critical infrastructure operators to meet CRA requirements and run attested edge AI workloads securely.

On the technical front, Canonical cut costs and complexity of managing large device fleets. The improved snap-delta format reduces OTA update sizes by 50% to 90% for most snaps, with core base snap updates shrinking from 16MB to just 1.5MB. A new initramfs-based installation path eliminates redundant reboots, speeding up provisioning. The Chisel-based build system uses release-specific slice definitions that tie every file back to a specific source package, improving integrity checking and vulnerability triage while reducing base image footprint by 7%. At the bootloader layer, u-boot configuration moves to a single raw partition with redundant environment support. For encryption, TPM-sealed keys are now stored directly in LUKS2 headers, and new native OP-TEE integration brings ARM TrustZone-backed key protection to embedded deployments, reducing the risk of key compromise.