Buffer overflow in Hdfgroup Hdf5
CVE-2026-29043
HDF5 is software for managing data. In 1.14.1-2 and earlier, an attacker who can control an h5 file parsed by HDF5 can trigger a write-based heap buffer overflow condition in the H5T__ref_mem_setnull method. This can lead to a denial-of-se…
Vulnerability class: Buffer Overflow
EPSS: 0.000 (15.7th 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 — versions <= 1.14.1-2
Weakness classification (CWE)
References
- https://github.com/HDFGroup/hdf5/security/advisories/GHSA-qm2m-5g5w-2277 (x_refsource_CONFIRM)
Frequently asked questions
- What is CVE-2026-29043?
- CVE-2026-29043 is a medium-severity vulnerability in Hdfgroup Hdf5, classified under Heap-based Buffer Overflow. CVSS score: 5.5/10. Published 2026-04-10.
- How severe is CVE-2026-29043?
- Medium severity. CVSS v3 base score is 5.5 out of 10.