The Bluetooth subsystem in QEMU mishandles negative values for length variables, leading to memory corruption.
https://lists.gnu.org/archive/html/qemu-devel/2018-11/msg03570.html
http://www.securityfocus.com/bid/106050
http://www.openwall.com/lists/oss-security/2018/11/29/1
http://lists.opensuse.org/opensuse-security-announce/2019-04/msg00072.html