A security issue affects the Ubuntu 16.10 (Yakkety Yak), Ubuntu 16.04 LTS (Xenial Xerus), Ubuntu 14.04 LTS (Trusty Tahr), Ubuntu 12.04 LTS (Precise Pangolin), and their derivatives, including Ubuntu 16.10 for Raspberry Pi 2 and Ubuntu 16.04 LTS for Raspberry Pi 2. The kernel vulnerability appears to have been a race condition, discovered by Philip Pettersson in Linux kernel’s af_packet implementation, which could have allowed an unprivileged local attacker to crash the vulnerable system or run programs with administrative privileges (as root).