Security vulnerabilities and automated fixes for css parsing issues
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A critical stack buffer overflow vulnerability was discovered and patched in `lib/css/src/selector.c`, where unbounded `strcpy()` calls could allow attackers to overwrite stack memory and achieve arbitrary code execution. This fix eliminates a classic but dangerous class of memory corruption bug that has plagued C codebases for decades. Understanding how this vulnerability works — and how it was fixed — is essential knowledge for any developer working with low-level C code or parsing user-contro