New "GoFetch" Vulnerability in Apple M-Series Chips Leaks Secret Encryption Keys

**GoFetch** is a microarchitectural side-channel vulnerability in Apple M-series processors that abuses the data memory-dependent prefetcher (DMP) to cause secret-dependent memory accesses and enable extraction of cryptographic keys from otherwise constant-time implementations; it cannot be fully fixed in existing CPUs and requires library-level mitigations (M3 can mitigate via DIT). The report also mentions a separate GPU cache side-channel attack using WebGPU in browsers that can leak sensitive information without user interaction.