It is expensive to have a security team, and not all open source projects can afford it.
Stefano Stabellini serves as virtualization expert in a new dynamic team at Aporeto. Previously, he was senior principal software engineer at Citrix, leading a group of open source engineers working on the Xen Project. Stefano has been involved in Xen development since 2007, focusing on several different projects, spanning from Qemu to Xen and the Linux kernel. He created libxenlight in November 2009 and started the Xen port to ARM with virtualization extensions with Ian Campbell in 2011. Currently, he maintains Xen support in Qemu and Xen on ARM in Linux and Xen.