Quick Emulator (Qemu) built with the USB EHCI Emulation support is vulnerable to a memory leakage issue. It could occur while processing packet data in 'ehci_init_transfer'. A guest user/process could use this issue to leak host memory, resulting in DoS for a host.
https://security.gentoo.org/glsa/201701-49
https://lists.debian.org/debian-lts-announce/2018/09/msg00007.html
https://access.redhat.com/errata/RHSA-2017:2408
https://access.redhat.com/errata/RHSA-2017:2392