Four-Byte Write and Timing Bug Let Researchers Run Code in Windows… | HappeningNow.news

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Four-Byte Write and Timing Bug Let Researchers Run Code in Windows SmartScreen Enclave

A Windows 11 SmartScreen flaw allowed researchers with local access to run code inside a VBS enclave; Microsoft patched it in September.

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Security researchers managed to execute their own code inside a Virtualization‑Based Security (VBS) enclave, a protected memory region that Windows isolates to safeguard sensitive data. The compromised enclave is responsible for handling passwords used by Windows’ anti‑phishing feature, demonstrating that the enclave’s isolation can be bypassed.

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