Available for the Ubuntu 18.10 (Cosmic Cuttlefish), Ubuntu 16.04 LTS (Xenial Xerus), and Ubuntu 14.04 LTS (Trusty Tahr) operating system series, the new Linux kernel updates address a total of 12 security issues, one affecting both Ubuntu 18.10 and Ubuntu 16.04 LTS, three affecting Ubuntu 18.10, four affecting Ubuntu 16.04 LTS, and other four affecting Ubuntu 14.04 LTS. For Ubuntu 18.10 (Cosmic Cuttlefish), the new kernel patch fixes a race condition (CVE-2018-14625) discovered in Linux kernel’s vsock address family implementation, a use-after-free vulnerability (CVE-2018-16882) in the KVM implementation, as well as two other flaws found in the crypto subsystem and KVM implementation (CVE-2018-19407 and CVE-2018-19854).