CVE-2025-7069 HDF5 H5FSsection.c H5FS__sect_link_size heap-based overflow

Medium 4.8 Published 4 Jul 2025 Updated 8 Jul 2025

A heap-based buffer overflow in the HDF5 library allows local attackers to potentially execute arbitrary code or cause a denial of service.

Exploited in the wild: Not known
Login needed: Any signed-in user
Attackable: Local or same network only
Victim action needed: Not needed
Fix: Available

What is CVE-2025-7069?

CVE-2025-7069 is a medium-severity memory corruption vulnerability in Hdfgroup Hdf5, published on 4 Jul 2025. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

A vulnerability, which was classified as problematic, was found in HDF5 1.14.6. Affected is the function H5FS__sect_link_size of the file src/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.

Weakness: CWE-122, CWE-119

Which versions are affected by CVE-2025-7069?

It affects 1 product.

Products include Hdfgroup Hdf5.

How do I fix CVE-2025-7069?

Apply the vendor's patch.

Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.

Is CVE-2025-7069 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2025-7069 exists.

All Hdfgroup Hdf5 vulnerabilities

Sources

Also known as DEBIAN-CVE-2025-7069, ECHO-aca6-bc3a-42ce, GHSA-8qx3-g6mx-gvp7, JLSEC-2026-351, ROOT-OS-DEBIAN-12-CVE-2025-7069, UBUNTU-CVE-2025-7069.