Affected Ubuntu releases include Ubuntu 17.04 (Zesty Zapus), Ubuntu 16.04 LTS (Xenial Xerus), Ubuntu 14.04 LTS (Trusty Tahr), Ubuntu 12.04 ESM (Extended Security Maintenance), as well as all official derivatives, including Kubuntu, Xubuntu, Lubuntu, Ubuntu MATE, Ubuntu GNOME, Ubuntu Studio, Ubuntu Kylin, and Ubuntu Budgie. Among the Linux kernel components fixed in these updates, we can mention the KVM subsystem, the F2FS (Flash-Friendly File System) implementation, the Xen virtual block driver, the XFS filesystem, the netlink wireless configuration, the ATI Radeon framebuffer driver, the iSCSI transport implementation the Floating Point Unit (fpu) subsystem, and the key management subsystem.