In HDF5 1.10.1, there is an out of bounds read vulnerability in the function H5Oplineplinedecode in H5Opline.c in libhdf5.a. For example, h5dump would crash when someone opens a crafted hdf5 file.
An issue was discovered in the HDF HDF5 1.8.20 library. There is a buffer over-read in H5Ochunkdeserialize in H5Ocache.c.