New VMScape Spectre-BTI Attack Exploits Isolation Gaps in AMD and Intel CPUs

A novel speculative execution attack named VMSCAPE allows a malicious virtual machine (VM) to breach its security boundaries and steal sensitive data, like cryptographic keys, directly from its host system. The vulnerability, identified as CVE-2025-40300, affects a wide range of modern processors, including all current generations of AMD Zen (1 through 5) and Intel’s Coffee […]

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