CVE-2024-21639

Summary

CVE-2024-21639 is a vulnerability affecting CEF (Chromium Embedded Framework), a library used for embedding Chromium-based browsers in other applications. The issue lies in the `CefLayeredWindowUpdaterOSR::OnAllocatedSharedMemory` function, which fails to verify the size of the allocated shared memory, leading to an out-of-bounds read beyond the sandbox. This vulnerability could potentially be exploited to execute arbitrary code outside the intended sandboxed environment. The vulnerability was addressed by the commit 1f55d2e.

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