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Ubuntu 25.10 'Questing Quokka' introduces major architectural changes including mandatory Wayland sessions, Rust-based core utilities replacing GNU tools, and sudo-rs replacing traditional sudo. The release features GNOME 49, TPM-backed full disk encryption, Network Time Security in Chrony, and A/B booting for Raspberry Pi. Running on Linux kernel 6.17 with updated toolchains (OpenJDK 25, Python 3.14 RC3, Golang 1.25, GCC 15, Rust 1.85), it emphasizes memory safety and security improvements. Support extends until July 2026 with an upgrade path to Ubuntu 26.04 LTS.

Ubuntu 25.10: Key Features and Upgrades Announced