USN-2599-2: Linux kernel (Utopic HWE) vulnerability

Description

USN-2599-1 fixed vulnerabilities in the Linux kernel, however an unrelatedregression in the auditing of some path names was introduced. Due to theregression the system could crash under certain conditions. This update fixes the problem. We apologize for the inconvenience. Original advisory details: A race condition between chown() and execve() was discovered in the Linux kernel. A local attacker could exploit this race by using chown on a setuid-user-binary to gain administrative privileges. The problem can be corrected by updating your system to the following package version: To update your system, please follow these instructions: https://wiki.ubuntu.com/Security/Upgrades. After a standard system update you need to reboot your computer to makeall the necessary changes. LP: 1450442