qemu_deliver_packet_iov in net/net.c in Qemu accepts packet sizes greater than INT_MAX, which allows attackers to cause a denial of service or possibly have unspecified other impact.
https://www.debian.org/security/2018/dsa-4338
https://usn.ubuntu.com/3826-1/
https://lists.gnu.org/archive/html/qemu-devel/2018-11/msg06054.html
https://lists.gnu.org/archive/html/qemu-devel/2018-09/msg03267.html
https://lists.debian.org/debian-lts-announce/2018/11/msg00038.html
https://access.redhat.com/errata/RHSA-2019:2553
https://access.redhat.com/errata/RHSA-2019:2425