In libyal libfwsi versions prior to 20191006, libfwsi_extension_block_copy_from_byte_stream in libfwsi_extension_block.c has a heap-based buffer over-read because rejection of an unsupported size only considers values less than 6, even though values of 6 and 7 are also unsupported.
46e852d4c7c1971b5e6984b6483409bbb11e258031a5a6fb7803147f5c7a344d
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