In HDF5 1.10.1, there is a NULL pointer dereference in the function H5Oplinedecode in the H5Opline.c file in libhdf5.a. For example, h5dump would crash when someone opens a crafted hdf5 file.
In HDF5 1.10.1, there is an out of bounds write vulnerability in the function H5Gentdecodevec in H5Gcache.c in libhdf5.a. For example, h5dump would crash or possibly have unspecified other impact someone opens a crafted hdf5 file.