drivers/video/msm/vidc/common/enc/venc.c in the Qualcomm components in Android before 2016-08-05 on Nexus 7 (2013) devices does not validate VEN_IOCTL_GET_SEQUENCE_HDR ioctl calls, which allows attackers to gain privileges via a crafted application, aka Android internal bug 28769352 and Qualcomm internal bug CR556356.