Summary: The article discusses a suspected backdoor in the xz software, which is a popular compression tool used in many Linux distributions. The backdoor was allegedly inserted by an individual named Jia Tan, who made commits to the xz repository without proper authorization or review. The commits added code that could potentially introduce security vulnerabilities or allow for unauthorized access to sensitive data. The article highlights the lack of proper auditing and review processes in the software development cycle, which allowed such a backdoor to go undetected for an extended period. The article also notes that GitHub has suspended Jia Tan's account and repository, preventing further changes to the codebase.