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Critical Linux Kernel Flaw Lets Attackers Escape Virtual Machines and Take Control of Hosts

A critical flaw in the Linux kernel may allow an attacker-controlled virtual machine (VM) to breach its isolation boundary and impact the host system. This vulnerability, identified as CVE-2026-99999 and referred to as PwnEscape by researcher Paulos Yibelo, originates from the Linux networking code rather than a specific hypervisor. Paulos Yibelo demonstrated a technique that […] The post Critical Linux Kernel Flaw Lets Attackers Escape Virtual Machines and Take Control of Hosts appeared first on Cyber Security News.
A critical flaw in the Linux kernel may allow an attacker-controlled virtual machine (VM) to breach its isolation boundary and impact the host system. This vulnerability, identified as CVE-2026-99999 and referred to as PwnEscape by researcher Paulos Yibelo, originates from the Linux networking code rather than a specific hypervisor. Paulos Yibelo demonstrated a technique that exposes host memory and, in their lab, progressed to host-level code execution. The flaw is serious for cloud providers and organizations that run untrusted workloads in virtual machines. VM isolation is…
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