Azure Linux 4.0

Azure Linux is a Microsoft-maintained, open-source Linux distribution built for Azure. It provides a lightweight, security-hardened operating system designed for VM-based workloads, with a minimal package set that reduces attack surface, lowers memory consumption, and enables faster boot times. Built on a robust open-source foundation from the Fedora ecosystem, Azure Linux includes an Azure-optimized kernel with Hyper-V guest drivers, performance tuning, and security hardening validated across Azure VM environments. It incorporates security features such as SELinux for mandatory access controls. Critical and high CVEs are addressed through SLA-driven patch delivery. Azure Linux integrates with Azure agents, VM extensions, and developer tools, enabling streamlined operations and management for virtual machines. It provides a consistent operating system foundation with a predictable release cadence.