Cybersecurity · 43 views
16-year-old KVM flaw allows attackers to escape VMs and take over Linux servers
A critical vulnerability in the Kernel-based Virtual Machine (KVM) module of the Linux kernel allows attackers with root access in a guest VM to execute arbitrary code on the host system.
AI Summary
A critical vulnerability in Linux’s Kernel-based Virtual Machine (KVM) module lets an attacker who gains root inside a guest VM execute arbitrary code on the host system, breaking the isolation that cloud providers and enterprises depend on. The flaw, identified as CVE‑2026‑53359, originates from a use‑after‑free bug in KVM’s shadow MMU emulation on x86 CPUs. Researcher Hyunwoo Kim reports the issue has existed in the kernel for 16 years and is the first guest‑to‑host escape that works on both Intel and AMD processors.
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