hw/net/e1000e_core.c in QEMU 5.0.0 has an infinite loop via an RX descriptor with a NULL buffer address.
https://lists.nongnu.org/archive/html/qemu-devel/2020-11/msg03185.html
https://lists.debian.org/debian-lts-announce/2022/09/msg00008.html
https://lists.debian.org/debian-lts-announce/2021/02/msg00024.html