/usr/lib/libsundials_cvodes.so.2 is in libsundials-cvodes2 2.5.0-3ubuntu1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/libsundials_cvodes.so.2.0.0
/usr/lib/libsundials_cvodes.so.2.0.0