In Snapdragon (Automobile ,Mobile) in version MSM8996AU, SD 425, SD 427, SD 430, SD 435, SD 450, SD 625, SD 650/52, SD 820, SD 820A, SD 835, SDA660, SDM429, SDM439, SDM630, SDM632, SDM636, SDM660, Snapdragon_High_Med_2016, a crafted HLOS client can modify the structure in memory passed to a QSEE application between the time of check and the time of use, resulting in arbitrary writes to TZ kernel memory regions.
In Snapdragon (Automobile, Mobile, Wear) in version MDM9206, MDM9607, MDM9615, MDM9640, MDM9650, MDM9655, MSM8996AU, SD 210/SD 212/SD 205, SD 410/12, SD 425, SD 427, SD 430, SD 435, SD 450, SD 600, SD 615/16/SD 415, SD 617, SD 625, SD 650/52, SD 820, SD 820A, SD 835, SD 845, SD 850, SDA660, SDM429, SDM439, SDM630, SDM632, SDM636, SDM660, SDX20, Snapdragon_High_Med_2016, when sending an malformed XML data to deviceprogrammer/firehose it may do an out of bounds buffer write allowing a region of memory to be filled with 0x20.