CVE-2026-26199
Buffer underflow in `H5Iget_name `/`H5G_get_name` if size is zero
CVSS Score
0.0
EPSS Score
0.0%
EPSS Percentile
0th
HDF5 is a high-performance library and a file format specification that implements the HDF5 data model. If `H5Iget_name` is invoked on a group id with `0` for the size parameter, it will underflow when trying to place a null terminator in the buffer. This can occur if `H5Iget_name` is invoked in a way where `size` can be forced to zero, and there is important data before the `name` buffer.
| CWE | CWE-124 |
| Vendor | hdfgroup |
| Product | hdf5 |
| Published | Jul 20, 2026 |
| Last Updated | Jul 20, 2026 |
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Affected Versions
HDFGroup / hdf5
<= 1.14.6