CVE-2025-6817 HDF5 H5Centry.c H5C__load_entry resource consumption
A local attacker can cause resource consumption in the HDF5 library via the H5C__load_entry function, leading to 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-2025-6817?
CVE-2025-6817 is a medium-severity denial of service vulnerability in Hdfgroup Hdf5, published on 28 Jun 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, has been found in HDF5 1.14.6. This issue affects the function H5C__load_entry of the file /src/H5Centry.c. The manipulation leads to resource consumption. The attack needs to be approached locally. The exploit has been disclosed to the public and may be used.
Which versions are affected by CVE-2025-6817?
It affects 1 product.
Products include Hdfgroup Hdf5.
How do I fix CVE-2025-6817?
No fix published yet.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2025-6817 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2025-6817 exists.
Other vulnerabilities in Hdfgroup Hdf5
Sources
Also known as DEBIAN-CVE-2025-6817, ECHO-1ec9-a1b3-6a19, GHSA-wg8f-wjx8-3m3m, JLSEC-2026-344, UBUNTU-CVE-2025-6817.