glibc: wordexp with WRDE_REUSE and WRDE_APPEND may return uninitialized memory

A flaw was found in glibc. When the wordexp function is called with the flags WRDEREUSE and WRDEAPPEND, it may return uninitialized memory. If the caller inspects the wewordv array or calls the wordfree function to free the allocated memory, the process will abort, resulting in a denial of servic...