CVE Vulnerabilities

CVE-2026-26199

Buffer Underwrite ('Buffer Underflow')

Published: Jul 20, 2026 | Modified: Jul 29, 2026
CVSS 3.x
6.5
MEDIUM
Source:
NVD
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L
CVSS 2.x
RedHat/V2
RedHat/V3
5.3 MODERATE
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:N/A:H
Ubuntu
MEDIUM
root.io logo minimus.io logo echo.ai logo

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.

Weakness

The product writes to a buffer using an index or pointer that references a memory location prior to the beginning of the buffer.

Affected Software

NameVendorStart VersionEnd Version
Hdf5Hdfgroup*2.1.0 (excluding)

Potential Mitigations

References