CVE-2025-2926 HDF5 H5Ocache.c H5O__cache_chk_serialize null pointer dereference

Medium 4.8 Published 28 Mar 2025 Updated 24 Jul 2025

A local attacker can cause a denial of service via null pointer dereference in the HDF5 library's cache serialization function.

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-2025-2926?

CVE-2025-2926 is a medium-severity vulnerability in Hdfgroup Hdf5, published on 28 Mar 2025. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

A vulnerability was found in HDF5 up to 1.14.6 and classified as problematic. This issue affects the function H5O__cache_chk_serialize of the file src/H5Ocache.c. The manipulation leads to null pointer dereference. An attack has to be approached locally. The exploit has been disclosed to the public and may be used.

Weakness: CWE-476, CWE-404

Which versions are affected by CVE-2025-2926?

It affects 1 product.

Products include Hdfgroup Hdf5.

How do I fix CVE-2025-2926?

Upgrade to a fixed version.

Is CVE-2025-2926 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2025-2926 exists.

All Hdfgroup Hdf5 vulnerabilities

Sources

Also known as AZL-59347, AZL-59397, DEBIAN-CVE-2025-2926, ECHO-60a4-0a7a-b682, GHSA-69xp-rrpm-qmj5, JLSEC-2026-336 and 2 more.