KVM/x86 Guest-to-Host Escape PoC Released (CVE-2026-64561)

Fri, 07 Aug 2026 11:54:55 +0000

Engineer — Act: A public PoC for a guest-to-host escape in KVM/x86 exists on GitHub — this breaks VM isolation and affects any Linux host using KVM (cloud workloads, CI runners, on-prem virtualization). Identify your kernel version, check vendor advisories for a patched kernel, and prioritize upgrading hypervisor hosts.
SOC/IR — Learn: No active exploitation or published IOCs yet, so no immediate hunt is warranted; however, understanding the escape class is useful for future detection design around anomalous host-side activity originating from guest processes.
Leader — Skip
Signals: CVE-2026-64561 — CISA KEV: not listed, EPSS 0.00, public PoC on GitHub, reported by 2 collected sources

Hypervisor-Escape on CuraSec