CVE-2026-19024
HDF5 H5Pget_fill_value NULL Pointer Dereference via Malformed Fill Value Message
CVSS Score
0.0
EPSS Score
0.0%
EPSS Percentile
0th
NULL pointer dereference in H5Pget_fill_value in HDF5 before 2.1.1 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.
| CWE | CWE-476 |
| Vendor | the hdf group |
| Product | hdf5 |
| Published | Aug 5, 2026 |
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Affected Versions
The HDF Group / HDF5
<= 2.1.1