OESA-2026-4051 hdf5 security update

HDF5 is a data model, library, and file format for storing and managing data. It supports an unlimited variety of datatypes, and is designed for flexible and efficient I/O and for high volume and complex data. HDF5 is portable and is extensible, allowing applications to evolve in their use of HDF...

CVE-2026-19025

H5Olayoutdecode in H5Olayout.c in HDF5 through 2.3.0 does not validate that a chunked dataset's stored chunk-layout dimensionality matches its dataspace rank when an existing dataset is opened, whereas this check is performed only at dataset-creation time. This allows attackers to cause a denial ...

PT-2026-68347

Name of the Vulnerable Software and Affected Versions HDF5 versions prior to 2.3.1 Description The H5O layout decode function in H5Olayout.c fails to validate that a chunked dataset's stored chunk-layout dimensionality matches its dataspace rank when an existing dataset is opened. This validation...

CVE-2026-19025: Divide By Zero

H5Olayoutdecode in H5Olayout.c in HDF5 through 2.3.0 does not validate that a chunked dataset's stored chunk-layout dimensionality matches its dataspace rank when an existing dataset is opened, whereas this check is performed only at dataset-creation time. This allows attackers to cause a denial ...