Integer overflow in the HTJ2K decoder (ht_undo_impl) leading to a
heap-buffer-overflow. HTJ2K support (OpenEXRCore internal_ht.cpp /
ht_undo_impl) was added in 3.4.0; affected range is 3.4.0-3.4.11.
The codec does not exist in 3.1.x, so 3.1.13 is not affected
(Debian reports only a fixed_version, not the affected range).