CVE-2026-19024 Details
Description
NULL pointer dereference in H5Pget_fill_value in HDF5 before 2.3.0 allows attackers to cause a denial of service via a dataset whose version 1 or 2 fill value message has the "defined" flag set together with a negative size field, which is not normalized to the library's "undefined" sentinel and reaches H5T_path_find with a NULL datatype.
A NULL pointer dereference vulnerability has been identified in HDF5 versions prior to 2.1.1. This issue occurs in the 'H5Pget_fill_value' function, where a dataset's fill value message can be crafted to include a negative size field, not normalized to the library's 'undefined' sentinel. This malformed message triggers a segmentation fault when the library attempts to process it, leading to a denial-of-service condition.
Users can upgrade to HDF5 version 2.1.1 or later to address this vulnerability.
Metrics
CVSS 4.0 Severity and Vector Strings:
CVSS 3.x Severity and Vector Strings:
No CVSS 3.x data is available for this CVE.
No data available for CVSS Version 2.0 on this CVE.
CISA-ADP
Assessed Aug 6, 2026References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://github.com/HDFGroup/hdf5/issues/6487 | HDFG | |
| https://github.com/HDFGroup/hdf5/issues/6487 | CISA-ADP |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-476 | NULL Pointer Dereference | HDFG |
Affected Products
No affected product data is available for this CVE.
Change History
4 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Aug 6, 2026 | CVE Modified | HDFG |
| Aug 6, 2026 | CVE Modified | HDFG |
| Aug 6, 2026 | CVE Modified | CISA-ADP |
| Aug 5, 2026 | New CVE Received | HDFG |