SliceGuard: Secure and Dynamic 5G RAN Slicing with WebAssembly

5G enables diverse services through network slicing, allowing multiple virtual networks to share physical infrastructure. However, efficiently managing resources across slices is challenging. This demo presents SliceGuard, a two-level scheduling system that leverages WebAssembly (Wasm) to allow slice owners to run customized schedulers in a secure, platform-independent environment, while the network operator manages inter-slice resource allocation. We demonstrate dynamic slicing for cloud gaming over 5G and show how Wasm enables real-time scheduler updates and fault isolation. This approach enhances flexibility, security, and customization for private 5G networks.