MEDIUM 6.8 NVD

CVE-2026-19025

H5O__layout_decode 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

H5O__layout_decode 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 of service (divide-by-zero and application crash in H5S__hyper_iter_get_seq_list in src/H5Shyper.c) via a crafted HDF5 file with mismatched chunk/dataspace ranks that is opened and read via H5Dopen2 and H5Dread, e.g. by the h5repack tool.

References

https://github.com/HDFGroup/hdf5/issues/6491

Published: 2026-08-05 · Source: NVD · Feed updated: 2026-08-06

This medium severity vulnerability with a CVSS score of 6.8 was published on 2026-08-05 via NVD.

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