CVE-2025-6857: HDF5 H5Gnode.c H5G__node_cmp3 stack-based overflow

Severity: high (CVSS 7.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.3% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2025-06-29 · updated 2026-06-17
Weakness: CWE-119

Description

A vulnerability has been found in HDF5 1.14.6 and classified as problematic. Affected by this vulnerability is the function H5G__node_cmp3 of the file src/H5Gnode.c. The manipulation leads to stack-based buffer overflow. It is possible to launch the attack on the local host. The exploit has been disclosed to the public and may be used.

Affected products

HDF5: 1.14.6

References

https://github.com/HDFGroup/hdf5/issues/5575
https://github.com/user-attachments/files/20623442/hdf5_crash_7.txt
https://vuldb.com/?ctiid.314329
https://vuldb.com/?id.314329
https://vuldb.com/?submit.602529

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