Lydia Winters shows off Microsoft’s “Minecraft” at the 2015 Electronic Entertainment Expo in Los Angeles. Security experts around the world are racing to patch one of the worst computer vulnerabilities discovered in years, a critical flaw in open-source code widely used across industry and government in cloud services and enterprise software. DAMIAN DOVARGANES/AP FILE
BOSTON – Security pros say it’s one of the worst computer vulnerabilities they’ve ever seen. Firms including Microsoft say state-backed Chinese and Iranian hackers and…