Gentoo Linux Security Advisory 201611-9 - Multiple vulnerabilities have been found in Xen, the worst of which allows gaining of privileges on the host system. Versions less than 4.6.3-r3 are affected.
150b8fc9649193c656cb063bfd7db2df2856b9f70acd30052aa163a2c2782573
Debian Linux Security Advisory 3633-1 - Multiple vulnerabilities have been discovered in the Xen hypervisor.
69e2b39b3913e68cc3897dadfc8422de8be200cf50452bcb270d6b48048d7d24