In QEMU 3.1.0, load_device_tree in device_tree.c calls the deprecated load_image function, which has a buffer overflow risk.
https://www.debian.org/security/2019/dsa-4506
https://access.redhat.com/errata/RHSA-2019:2553
https://access.redhat.com/errata/RHSA-2019:2507
https://access.redhat.com/errata/RHSA-2019:1968
https://access.redhat.com/errata/RHSA-2019:1881
https://access.redhat.com/errata/RHSA-2019:1743