vGPU, or virtual GPU, is a virtualization layer that lets several virtual machines share one physical graphics processor. It is used for graphics-heavy workloads such as AI, rendering, and desktop virtualization, while the hypervisor and vendor driver split GPU capacity among guests. Because it sits close to hardware, a vGPU stack includes privileged code on the host and software inside guest environments.
In cyber security, vGPU matters because bugs in the driver, management layer, or device emulation can affect isolation between tenants. A flaw may expose data, crash a host, or in rare cases help an attacker move from a guest to the underlying system. Defenders should track versions carefully, patch host and guest components together, and verify compatibility before upgrades. In real environments, vGPU security is part of both patch management and workload segregation.