Ubuntu Security Notice 3261-1 - Zhenhao Hong discovered that QEMU incorrectly handled the Virtio GPU device. An attacker inside the guest could use this issue to cause QEMU to crash, resulting in a denial of service. This issue only affected Ubuntu 16.04 LTS and Ubuntu 16.10. Li Qiang discovered that QEMU incorrectly handled the 6300esb watchdog. A privileged attacker inside the guest could use this issue to cause QEMU to crash, resulting in a denial of service. Various other issues were also addressed.
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Gentoo Linux Security Advisory 201612-56 - Multiple vulnerabilities have been found in Xen, the worst of which could lead to the execution of arbitrary code on the host system. Versions less than 4.7.1-r4 are affected.
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