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.
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History
Wed, 05 Aug 2026 23:00:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| 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. | |
| Title | Nbit filter NULL/short parameter-array dereference | |
| Weaknesses | CWE-1284 CWE-476 |
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cvssV4_0
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MITRE
Status: PUBLISHED
Assigner: HDFG
Published:
Updated: 2026-08-05T22:47:58.227Z
Reserved: 2026-08-05T22:14:40.349Z
Link: CVE-2026-19026
Vulnrichment
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NVD
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Redhat
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OpenCVE Enrichment
Updated: 2026-08-06T00:30:03Z