Qemu has a Buffer Overflow in rtl8139_do_receive in hw/net/rtl8139.c because an incorrect integer data type is used.
https://www.debian.org/security/2019/dsa-4454
https://usn.ubuntu.com/3826-1/
https://seclists.org/bugtraq/2019/May/76
https://lists.gnu.org/archive/html/qemu-devel/2018-09/msg03269.html
https://lists.debian.org/debian-lts-announce/2019/01/msg00023.html
https://access.redhat.com/errata/RHSA-2019:2553
https://access.redhat.com/errata/RHSA-2019:2425