  We present a four-dimensional Planck-scale corrected quadratic extension of
General Relativity (GR) where no a priori relation between metric and
connection is imposed (Palatini formalism). Static spherically symmetric
electrovacuum solutions are obtained in exact analytical form. The macroscopic
properties of these solutions are in excellent agreement with GR, though the
region around the central singularity is modified. In fact, the singularity is
generically replaced by a wormhole supported by the electric field, which
provides a non-trivial topology to the space-time. Moreover, for a certain
charge-to-mass ratio the geometry is completely regular everywhere. For such
regular solutions, the horizon disappears in the microscopic regime below a
critical number of charges ($N<17$), yielding a set of massive objects that
could be naturally identified as black hole remnants.
