The ethtool_get_wol function in net/core/ethtool.c in the Linux kernel through 4.7 as used in Android before 2016-08-05 on Nexus 5 and 7 (2013) devices does not initialize a certain data structure which allows local users to obtain sensitive information via a crafted application aka Android internal bug 28803952 and Qualcomm internal bug CR570754.