Uninitialized pointer field

The pointer field will point to an arbitrary memory location, any attempt to write may cause corruption. A pointer field is not initialized in the constructor
/src/mongo/db/auth/authentication_session.h:79: UNINIT_CTOR 117647 Class member declaration for "_session".
/src/mongo/db/auth/authentication_session.cpp:84: UNINIT_CTOR 117647 Non-static class member "_session" is not initialized in this constructor nor in any functions that it calls.