Multiple denial of service vulnerabilities exist in HDF5 before version 2.3.0, including untrusted pointer dereference, NULL pointer dereference, out-of-bounds heap read, and size underflow issues. These flaws affect various components such as the h5dump tool, fill value handling, N-Bit filter processing, and Fletcher32 checksum calculation. The vulnerabilities can be triggered by crafted HDF5 files and may cause application crashes or memory disclosure in constrained cases. A security update fixing these issues is available in version 1.14.5-8.oe2403sp4.