CVE-2025-6270: HDF5 H5FSsection.c H5FS__sect_find_node heap-based overflow

Severity: medium (CVSS 5.3 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: 2025-06-19 · updated 2026-06-17
Weakness: CWE-119

Description

A vulnerability, which was classified as critical, has been found in HDF5 up to 1.14.6. Affected by this issue is the function H5FS__sect_find_node of the file H5FSsection.c. The manipulation leads to heap-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: before 2.0.0 — fixed in 2.0.0

How to fix

Upgrade to a fixed version: HDF5 2.0.0. Check the vendor advisory for mitigations.

References

https://github.com/HDFGroup/hdf5/issues/5580
https://github.com/user-attachments/files/20626642/reproduce.tar.gz
https://vuldb.com/?ctiid.313274
https://vuldb.com/?id.313274
https://vuldb.com/?submit.592588
https://github.com/HDFGroup/hdf5/issues/5580

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