CVE-2026-19023
HDF5 h5dump Untrusted Pointer Dereference in Binary Output of Variable-Length String Datasets
CVSS Score
0.0
EPSS Score
0.0%
EPSS Percentile
0th
Untrusted pointer dereference in the render_bin_output function in the h5dump tool in HDF5 before 2.1.1 allows attackers to cause a denial of service via a variable-length string dataset with more than one element dumped in binary mode, which corrupts the per-element stride calculation and causes subsequent elements to be read from a misaligned offset and dereferenced as a pointer.
| CWE | CWE-822 |
| Vendor | the hdf group |
| Product | hdf5 |
| Published | Aug 5, 2026 |
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Affected Versions
The HDF Group / HDF5
<= 2.1.1