Qemu emulator built with the virtio-serial vmchannel support is vulnerable to a buffer overflow issue. It could occur while exchanging virtio control messages between guest & the host. more detail at https://github.com/qemu/qemu/commit/7882080388be5088e72c425b02223c02e6cb4295 https://nvd.nist.gov/vuln/detail/CVE-2015-5745