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CVE PROGRAM SOURCE RECORD6.8 Medium

CVE-2026-19026

Nbit filter NULL/short parameter-array dereference

Description

H5Z__filter_nbit in H5Znbit.c in HDF5 prior to 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.

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

The HDF Group HDF5

Default version status: unaffected

  • <=2.3.0affected

References