static inline unsigned char *PopHexPixel(const char hex_digits[][3],
  const size_t pixel,unsigned char *pixels)
{
  register const char
    *hex;

  hex=hex_digits[pixel];
  *pixels++=(unsigned char) (*hex++);
  *pixels++=(unsigned char) (*hex);
  return(pixels);
}

This vulnerability category highlights issues in resource management where failures to properly release memory, file handles, or other resources can degrade system performance or enable denial-of-service conditions.