CVE-2026-19025
HDF5 divide-by-zero (SIGFPE) via mismatched chunk-layout dimensionality and dataspace rank on dataset open
CVSS Score
0.0
EPSS Score
0.0%
EPSS Percentile
0th
H5O__layout_decode in H5Olayout.c in HDF5 through 2.3.0 does not validate that a chunked dataset's stored chunk-layout dimensionality matches its dataspace rank when an existing dataset is opened, whereas this check is performed only at dataset-creation time. This allows attackers to cause a denial of service (divide-by-zero and application crash in H5S__hyper_iter_get_seq_list in src/H5Shyper.c) via a crafted HDF5 file with mismatched chunk/dataspace ranks that is opened and read via H5Dopen2 and H5Dread, e.g. by the h5repack tool.
| CWE | CWE-369 |
| Vendor | the hdf group |
| Product | hdf5 |
| Published | Aug 5, 2026 |
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Affected Versions
The HDF Group / HDF5
<= 2.3.0