A decades-old legal dispute over UNIX code ownership has resurfaced, with a company called Xinuos — which acquired SCO's software assets — now suing IBM over claims that Big Blue improperly used SCO-owned code in Linux and its own operating systems. The case originated in 2003 when SCO alleged IBM contributed proprietary UNIX code from the failed "Project Monterrey" collaboration to open-source Linux, and has continued in various forms despite a 2021 settlement between the original parties. A recent hearing revisited familiar arguments about code ownership and licensing rights, with a key question being whether Xinuos even has legal standing to pursue the case at this stage.
