The mptsas_fetch_requests function in hw/scsi/mptsas.c in QEMU (aka Quick Emulator) allows local guest OS administrators to cause a denial of service (infinite loop, and CPU consumption or QEMU process crash) via vectors involving s->state.
https://lists.gnu.org/archive/html/qemu-devel/2016-05/msg04027.html
https://security.gentoo.org/glsa/201609-01