CVE-2026-26199

Published: Jul 20, 2026Modified: Jul 20, 2026

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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:XShow less

Source: security-advisories@github.com (Secondary)

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.

Related CWEs

CWE-124

Buffer Underwrite ('Buffer Underflow')

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

References (3)

https://github.com/HDFGroup/hdf5/blob/develop/src/H5Gname.c#L474

Source: security-advisories@github.com

https://github.com/HDFGroup/hdf5/security/advisories/GHSA-5c6x-jmgf-f5vc

Source: security-advisories@github.com

https://github.com/HDFGroup/hdf5/security/advisories/GHSA-5c6x-jmgf-f5vc

Source: 134c704f-9b21-4f2e-91b3-4a467353bcc0

Timeline

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