diff -Nur p7zip/CPP/7zip/Archive/7z/7zIn.cpp CVE-2016-9296_mod/CPP/7zip/Archive/7z/7zIn.cpp
--- p7zip/CPP/7zip/Archive/7z/7zIn.cpp	2016-05-20 16:20:03.000000000 +0800
+++ CVE-2016-9296_mod/CPP/7zip/Archive/7z/7zIn.cpp	2019-03-06 22:03:43.370014466 +0800
@@ -1097,7 +1097,8 @@
       if (CrcCalc(data, unpackSize) != folders.FolderCRCs.Vals[i])
         ThrowIncorrect();
   }
-  HeadersSize += folders.PackPositions[folders.NumPackStreams];
+  if (folders.PackPositions)
+      HeadersSize += folders.PackPositions[folders.NumPackStreams];
   return S_OK;
 }