NVIDIA CUDA Heap Overflow Exposes GPU Cloud Isolation Flaw: Driver-Level Security Must Move to Hardware
At Pwn2Own Berlin 2026, a heap overflow in NVIDIA CUDA Toolkit's NVVM compiler (CVE-2026-12839) enabled GPU cloud cross-tenant escape. The attack chain from malicious PTX to driver compromise to host kernel breaks current driver-level isolation, forcing a fundamental security architecture re-evaluation for shared GPU AI infrastructure.
