medium6.5
CVE-2026-26199
HDF5 is a high-performance library and a file format specification that implements the HDF5 data model.
Impact
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.
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| Hdfgroup | Hdf5 | before 2.1.0 |