Utf8

Critical Buffer Overflow in UTF-8 Validation: How Unchecked memcpy Enables Arbitrary Code Execution

A critical buffer overflow vulnerability was discovered and patched in third-party UTF-8 validation code, where multiple unchecked `memcpy` operations could allow attackers to write beyond buffer boundaries, corrupt heap metadata, and potentially execute arbitrary code. This fix highlights a timeless lesson in C programming: never trust that your source data fits in your destination buffer. The patch affects `lemire-avx2.c`, `lemire-sse.c`, and `main.c` — three files that together form the backb