Intel processors - power management throttling: The Intel half of Hertzbleed: observable behaviour in power-management

Impact

The Intel half of Hertzbleed: observable behaviour in power-management throttling lets an authenticated user infer processed data over a network path. Same operator exposure as the AMD variant - host-side cryptography on your GPU nodes and control plane, not GPU memory.

Who can reach it

Authenticated user, remotely exploitable via timing of network-facing crypto operations. No co-tenancy required.

What to do

Intel likewise did not ship a microcode fix. Mitigation is constant-time cryptographic software, or disabling Turbo Boost / SpeedStep which costs substantial throughput on a GPU host that is already CPU-bound in the data loader. Treat as UNPATCHABLE in hardware; patch the crypto libraries instead.

References