Search notes:

Oracle: Init parameter _DMM_BLAS_LIBRARY

The value of _dmm_blas_library controls which BLAS/LAPACK dynamic library is loaded.
Deactivate Intel's Math Kernel Libraries:
alter system set "_dmm_blas_library" = 'libora_netlib.so' scope=spfile;

See also

ORA-40238: invalid linear algebra shared library libora_netlib.so
init parameters

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