String Handling

How buffer overflow via insecure strcpy/strncpy happens in C textbox widgets and how to fix it

A high-severity buffer overflow vulnerability was discovered in the Aroma UI framework's textbox widget where `strncpy()` was used to copy user-provided text without guaranteed null-termination safety. The fix replaces the dangerous `strncpy()` pattern with `snprintf()`, which automatically handles buffer boundaries and null-termination in a single, safer operation.