drivers/media/platform/msm/camera_v2/pproc/cpp/msm_cpp.c in the Qualcomm components in Android before 2016-08-05 on Nexus 5 devices does not validate CPP frame messages, which allows attackers to gain privileges via a crafted application, aka Android internal bug 28803645 and Qualcomm internal bug CR674712.
https://source.codeaurora.org/quic/la/kernel/msm/commit?id=f4e2f2d4ef58c88340774099dff3324ec8baa24a