Out-of-bounds read

Incorrect values read from a different memory region will cause incorrect computations. Out-of-bounds read from a buffer
/src/mongo/bson/util/simple8b_type_util.cpp:200: OVERRUN 120616 Checking "size > 16UL" implies that "size" may be up to 16 on the false branch.
/src/mongo/bson/util/simple8b_type_util.cpp:205: OVERRUN 120616 Overrunning array of 16 bytes at byte offset 16 by dereferencing pointer "arr + size".