A vulnerability in Linux has been identified that enables untrusted virtual machines to gain root access to host machines. This flaw, categorized as CVE-2026-53359, affects the Kernel-based Virtual Machine (KVM) component, which is included in many Linux distributions. It allows guest virtual machines, commonly used in cloud platforms, to escape their isolated environments. The vulnerability impacts KVM on both AMD and Intel processors and has remained undetected in the Linux kernel for 16 years.
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Linux vulnerability allows guest virtual machines to escape to host systems
A significant vulnerability in Linux allows guest virtual machines to escape their isolated environments and gain root access to host systems. Tracked as CVE-2026-53359, this flaw affects KVM on AMD and Intel processors and has been present in the Linux kernel for 16 years.
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Google pays $250K for Linux vulnerability allowing guest VM escapes
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Linux vulnerability allows guest virtual machines to escape to host systems