CVE-2026-17572 HDF5 SOHM List Index Heap Buffer Overflow
Attackers can cause a denial of service via a crafted HDF5 file triggering a heap buffer overflow in the SOHM list-index deserialization code.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- A user has to click or open something
- Fix
- Available
What is CVE-2026-17572?
CVE-2026-17572 is a medium-severity memory corruption vulnerability in Hdfgroup Hdf5, published on 27 Jul 2026. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.
Official description
Heap-based buffer overflow in the SOHM list-index deserialization code in HDF5 through 2.1.1 on all platforms allows attackers to cause a denial of service (crash) via a crafted HDF5 file whose shared-message list index declares a num_messages count exceeding list_max, triggering out-of-bounds heap reads and writes in H5SM__cache_list_deserialize and H5SM__cache_list_verify_chksum.
Which versions are affected by CVE-2026-17572?
It affects 1 product.
Products include Hdfgroup Hdf5.
How do I fix CVE-2026-17572?
Upgrade to a fixed version.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2026-17572 being exploited?
There is no known exploitation of CVE-2026-17572 in the wild and no public exploit code.
Other vulnerabilities in Hdfgroup Hdf5
Sources
Also known as AZL-94016, DEBIAN-CVE-2026-17572, ECHO-94c1-7eed-d5a9, GHSA-9mx5-fj64-m52r, JLSEC-2026-1384, UBUNTU-CVE-2026-17572.