In Android before 2018-04-05 or earlier security patch level on Qualcomm Snapdragon Mobile Snapdragon Wear and Small Cell SoC FSM9055 IPQ4019 MDM9206 MDM9607 MDM9615 MDM9625 MDM9635M MDM9640 MDM9645 MDM9650 MDM9655 MSM8909W SD 210/SD 212/SD 205 SD 400 SD 410/12 SD 425 SD 430 SD 450 SD 600 SD 615/16/SD 415 SD 617 SD 625 SD 650/52 SD 800 SD 808 SD 810 SD 820 SD 835 SD 845 SD 850 and SDX20 code to zeroize AES key could be compiled out by compiler which could potentially result in information disclosure.