Ubuntu 26.04 LTS ’Resolute Raccoon’, released in April 2026, drops X11 entirely, rewrites sudo in Rust, and raises the RAM floor to 6 GB. Here’s what fleet administrators should audit before leaving 24.04 Noble Numbat behind.

Jenkins 2.541.2, released February 18, 2026, patches a stored XSS and an information disclosure flaw while the 2.541 line hardens the core with native Content Security Policy. The CI/CD dinosaur isn’t going extinct — it’s becoming the mainframe nobody can afford to migrate.