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This article details CVE-2026-64561, a critical use-after-free vulnerability in the Linux kernel's KVM virtualization layer that enables guest-to-host escapes with root privileges. The flaw specifically targets shadow memory management units used during nested virtualization, threatening cloud providers and enterprises running untrusted workloads by breaking isolation boundaries between tenants. While rooted in general system security, this issue is central to AI/ML infrastructure because modern training clusters rely heavily on KVM for resource partitioning; a compromise here could expose sensitive model weights or poisoning vectors across entire compute fleets.
CVE-2026-64561 Zapscape Lets KVM Guests Escape to Linux Host With Root Privileges

A Linux kernel vulnerability, tracked as CVE-2026-64561 and named Zapscape, could allow attackers to escape a KVM virtual machine and take control of its underlying Linux host with root privileges. The issue affects KVM/x86, a virtualization technology that separates guest systems from the physical server. The flaw is especially serious for cloud providers and enterprises […] The post CVE-2026-64561 Zapscape Lets KVM Guests Escape to Linux Host With Root Privileges appeared first on Cyber Security News.
A Linux kernel vulnerability, tracked as CVE-2026-64561 and named Zapscape, could allow attackers to escape a KVM virtual machine and take control of its underlying Linux host with root privileges. The issue affects KVM/x86, a virtualization technology that separates guest systems from the physical server. The flaw is especially serious for cloud…
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