The new kernel updates are available for Ubuntu 18.04 LTS (Bionic Beaver), Ubuntu 17.10 (Artful Aardvark), Ubuntu 16.04 LTS (Xenial Xerus), and Ubuntu 14.04 LTS (Trusty Tahr) operating system series and address a total of nine security vulnerabilities affecting the kernels for 64-bit, 32-bit, Raspberry Pi 2, AWS, and GCP systems, as well as cloud environments. They address a security issue (CVE-2018-1092 and CVE-2018-1093) affecting the Ubuntu 18.04 LTS, Ubuntu 17.10, and Ubuntu 16.04 LTS releases and discovered by Wen Xu in Linux kernel’s EXT4 file system implementation, which could allow an attacker to crash the vulnerable system by causing a denial of service when mounting a specially crafted EXT4 file system.