SLAC: Access-Driven CPU-to-GPU Side-channel Attacks via System-Level Cache on Apple Silicon
This work targets Apple Silicon heterogeneous SoCs and discovers that GPU memory accesses leave set-level footprints in the shared SLC, observable to an unprivileged CPU process, which enables the first fine-grained, access-driven, Prime+Probe-style CPU-to-GPU cache side-channel attacks against GPU workloads.