Buffer overflow in Hdfgroup Hdf5
CVE-2025-6516
A vulnerability has been found in HDF5 up to 1.14.6 and classified as critical. This vulnerability affects the function H5F_addr_decode_len of the file /hdf5/src/H5Fint.c. The manipulation leads to heap-based buffer overflow. An attack has to be approached locally. The exploit has been disclosed to the public and may be used.
Vulnerability class: Buffer Overflow
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L.
EPSS exploit prediction
EPSS: 0.004 (29.0th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 29th percentile — 29.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.003 · newest: 0.004 · change: +0.001
Affected products
- Hdfgroup Hdf5
- Hdf5 — versions 1.14.0, 1.14.1, 1.14.2
Weakness classification (CWE)
Public proof-of-concept exploits
References
- vuldb.com/ (technical-description, VDB Entry, Third Party Advisory, vdb-entry)
- vuldb.com/ (signature, Permissions Required, permissions-required, VDB Entry)
- vuldb.com/ (VDB Entry, Third Party Advisory, third-party-advisory)
- github.com/HDFGroup/hdf5/issues/5581 (issue-tracking, Exploit, Third Party Advisory, Issue Tracking)
- github.com/user-attachments/files/20626851/reproduce.tar.gz (Exploit, exploit)
Frequently asked questions
- What is CVE-2025-6516?
- CVE-2025-6516 is a medium-severity vulnerability in Hdfgroup Hdf5, classified under Improper Restriction of Operations within the Bounds of a Memory Buffer. CVSS score: 5.3/10. Published 2025-06-23.
- How severe is CVE-2025-6516?
- Medium severity. CVSS v3 base score is 5.3 out of 10.
- Is CVE-2025-6516 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.