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.
History

Mon, 20 Jul 2026 22:15:00 +0000

Type Values Removed Values Added
First Time appeared Hdfgroup
Hdfgroup hdf5
Vendors & Products Hdfgroup
Hdfgroup hdf5

Mon, 20 Jul 2026 20:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'poc', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Mon, 20 Jul 2026 15:30:00 +0000

Type Values Removed Values Added
Description 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.
Title Buffer underflow in `H5Iget_name `/`H5G_get_name` if size is zero
Weaknesses CWE-124
References
Metrics cvssV4_0

{'score': 5.9, 'vector': 'CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:A/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N'}


cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published: 2026-07-20T14:59:35.038Z

Updated: 2026-07-20T18:56:52.113Z

Reserved: 2026-02-11T19:56:24.813Z

Link: CVE-2026-26199

cve-icon Vulnrichment

Updated: 2026-07-20T18:56:18.160Z

cve-icon NVD

No data.

cve-icon Redhat

No data.