--- a/internal/dcraw_common.cpp~	2017-03-04 12:35:59.000000000 -0600
+++ b/internal/dcraw_common.cpp	2017-09-06 10:47:04.613293577 -0500
@@ -2716,6 +2716,10 @@
     checkCancel();
 #endif
     FORC3 mul[c] = getbits(6);
+#ifdef LIBRAW_LIBRARY_BUILD
+    if(!mul[0] || !mul[1] || !mul[2])
+      throw LIBRAW_EXCEPTION_IO_CORRUPT;
+#endif
     FORC3 {
       val = ((0x1000000/last[c] + 0x7ff) >> 12) * mul[c];
       s = val > 65564 ? 10:12;
--- a/dcraw/dcraw.c~	2017-09-06 10:48:15.000000000 -0500
+++ b/dcraw/dcraw.c	2017-09-06 10:49:23.103787467 -0500
@@ -2228,6 +2228,10 @@
     ((short *)buf)[i] = 2048;
   for (row=0; row < height; row+=4) {
     FORC3 mul[c] = getbits(6);
+#ifdef LIBRAW_LIBRARY_BUILD
+    if(!mul[0] || !mul[1] || !mul[2])
+      throw LIBRAW_EXCEPTION_IO_CORRUPT;
+#endif
     FORC3 {
       val = ((0x1000000/last[c] + 0x7ff) >> 12) * mul[c];
       s = val > 65564 ? 10:12;