The company pushed patched variants of the kernel packages in Ubuntu 16.10 (Yakkety Yak), Ubuntu 16.04 LTS (Xenial Xerus), Ubuntu 14.04 LTS (Trusty Tahr), and Ubuntu 12.04 LTS (Precise Pangolin) to the stable software repositories, addressing a total of four vulnerabilities discovered recently by various hackers and security researchers. The most common security flaw, CVE-2016-7425, was discovered by Marco Grassi in Linux kernel’s Areca RAID Controllers driver, which was not capable of properly validating control messages, thus allowing a local attacker to crash the system or gain administrative privileges. The issue affects Ubuntu 16.10, 16.04 LTS, 14.04, and 12.04 LTS.