The Bluetooth subsystem in QEMU mishandles negative values for length variables, leading to memory corruption.

References

• advisory http://lists.opensuse.org/opensuse-security-announce/2019-04/msg00072.html
• advisory http://www.securityfocus.com/bid/106050
• patch http://www.openwall.com/lists/oss-security/2018/11/29/1
• patch https://lists.gnu.org/archive/html/qemu-devel/2018-11/msg03570.html