In Android before 2018-04-05 or earlier security patch level on Qualcomm Snapdragon Mobile MDM9625 MDM9635M MDM9650 MDM9655 SD 400 SD 410/12 SD 615/16/SD 415 SD 617 SD 650/52 SD 808 SD 810 and SDX20 in a QTEE syscall handler HLOS can cause a buffer overflow to occur.