
No, guest-to-host escapes aren't unique to QEMU's emulation. Hyper-V and VMware have had many too—e.g., CVE-2019-0887 in Hyper-V (RDP-based escape) and recent 2025 VMware ESXi chains (actively exploited in the wild, allowing full hypervisor takeover). All use device emulation (even with hardware virt for CPU/memory), so bugs in those layers can break isolation anywhere. QEMU gets researched more due to being open-source, but none are immune. Writeup will clarify the specifics.
Post summary
The post notes that guest‑to‑host escapes exist across multiple hypervisors, cites CVE‑2019‑0887 in Hyper‑V, and confirms that recent 2025 VMware ESXi chains are actively exploited in the wild for full hypervisor takeover.
