linux: Linux kernel - linux-aws: Linux kernel for Amazon Web Services systems - linux-kvm: Linux kernel for cloud environments - linux-raspi2: Linux kernel for Raspberry Pi 2 Details: USN-3509-1 fixed vulnerabilities in the Linux kernel for Ubuntu 16.04 LTS. Unfortunately, it also introduced a regression that prevented the Ceph network filesystem from being used. This update fixes the problem. We apologize for the inconvenience. Original advisory USN-3509-1 introduced a regression in the Linux kernel for Ubuntu 16.04 LTS.