In Android before 2018-04-05 or earlier security patch level on Qualcomm Snapdragon Mobile and Snapdragon Wear MSM8909W, SD 210/SD 212/SD 205, SD 410/12, SD 615/16/SD 415, SD 808, and SD 810, if cchFriendlyName is greater than TZ_PR_MAX_NAME_LEN in function playready_leavedomain_generate_challenge(), a buffer overread occurs.