libbacktrace/Backtrace.cpp in debuggerd in Android 4.x before 4.4.4, 5.0.x before 5.0.2, 5.1.x before 5.1.1, and 6.x before 2016-05-01 allows attackers to gain privileges via an application containing a crafted symbol name, aka internal bug 27299236.
https://android.googlesource.com/platform/system/core/+/ad54cfed4516292654c997910839153264ae00a0