In BlueZ 5.42, an out-of-bounds read was identified in "packet_hexdump" function in "monitor/packet.c" source file. This issue can be triggered by processing a corrupted dump file and will result in btmon crash.
http://www.securityfocus.com/bid/95013
http://lists.opensuse.org/opensuse-security-announce/2019-04/msg00054.html