Out-of-bounds Read in Hdfgroup Hdf5
CVE-2026-17572
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.
Vulnerability class: Buffer Overflow
EPSS: 0.001 (1.0th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 5.5 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H.
Affected products
- Hdfgroup Hdf5
- The Hdf Group Hdf5 — versions <= 2.1.1
Weakness classification (CWE)
References
- 0253b833-3e77-4dfe-9d57-17db1a2f0a74 (Issue Tracking)
Frequently asked questions
- What is CVE-2026-17572?
- CVE-2026-17572 is a medium-severity vulnerability in Hdfgroup Hdf5, classified under Out-of-bounds Read. CVSS score: 5.5/10. Published 2026-07-27.
- How severe is CVE-2026-17572?
- Medium severity. CVSS v3 base score is 5.5 out of 10.