diff -aruN newlib-1.20.0/newlib/libc/locale/lctype.c newlibDup/newlib/libc/locale/lctype.c
--- newlib-1.20.0/newlib/libc/locale/lctype.c	2010-05-03 02:25:32.000000000 -0700
+++ newlibDup/newlib/libc/locale/lctype.c	2017-08-17 09:33:23.812683710 -0700
@@ -82,7 +82,9 @@
 	  _ctype_using_locale = 0;
 	else
 	  {
-	    _ctype_locale.codeset = strcpy (_ctype_locale_buf, charset);
+ 	    // Strncpy'ed to prevent memory overruns, limited to (_CTYPE_BUF_SIZE - 1) to prevent
+ 	    // overwriting of the last null char in _ctype_locale_buf that is needed for a string
+ 	    _ctype_locale.codeset = strncpy (_ctype_locale_buf, charset, (_CTYPE_BUF_SIZE - 1));
 	    char *mbc = _ctype_locale_buf + _CTYPE_BUF_SIZE - 2;
 	    mbc[0] = mb_cur_max;
 	    mbc[1] = '\0';