Vulnerability Description
H5Z__filter_nbit in H5Znbit.c in HDF5 through 2.3.0 dereferences cd_values[0] through cd_values[4] without validating that cd_values is non-NULL or that cd_nelmts is at least 5, the fixed size of the filter's header. This allows attackers to cause a denial of service via a crafted HDF5 file that stores the N-Bit filter pipeline message with zero client-data values, opened and read via H5Dread, e.g. by the h5ls or h5repack tools.
Related Weaknesses (CWE)
References
- https://github.com/HDFGroup/hdf5/issues/6489
- https://github.com/HDFGroup/hdf5/issues/6492
- https://github.com/HDFGroup/hdf5/pull/6497
- https://github.com/HDFGroup/hdf5/issues/6489
FAQ
What is CVE-2026-19026?
CVE-2026-19026 is a documented vulnerability. H5Z__filter_nbit in H5Znbit.c in HDF5 through 2.3.0 dereferences cd_values[0] through cd_values[4] without validating that cd_values is non-NULL or that cd_nelmts is at least 5, the fixed size of the ...
How severe is CVE-2026-19026?
CVSS scoring is not yet available for CVE-2026-19026. Check NVD for updates.
Is there a patch for CVE-2026-19026?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.