Vulnerability Description
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.
Related Weaknesses (CWE)
References
FAQ
What is CVE-2026-19025?
CVE-2026-19025 is a documented vulnerability. 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, whe...
How severe is CVE-2026-19025?
CVSS scoring is not yet available for CVE-2026-19025. Check NVD for updates.
Is there a patch for CVE-2026-19025?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.