The Android Security Patch level April 2018 is currently rolling out to Google Pixel, Pixel XL, Pixel 2, Pixel 2 XL, Nexus 5X, Nexus 6P, and Pixel C devices, addressing 19 security vulnerabilities in the 2018-04-01 security patch level, and 43 security vulnerabilities in the 2018-04-05 security patch level. Affected components include the Android runtime, System, Kernel, Framework, Broadcom and Qualcomm components, and Media framework. The security update runs on top of the Android 8.1 Oreo operating system and it’s recommended to all users.