What is CVE-2025-44904?

CVE-2025-44904 is a high-severity vulnerability in Hdfgroup Hdf5, classified under Heap-based Buffer Overflow. CVSS score: 8.8/10. Published 2025-05-30.

How severe is CVE-2025-44904?

High severity. CVSS v3 base score is 8.8 out of 10.

Buffer overflow in Hdfgroup Hdf5

CVE-2025-44904

hdf5 v1.14.6 was discovered to contain a heap buffer overflow via the H5VM_memcpyvv function.

Vulnerability class: Buffer Overflow

Published 2025-05-30 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.004 (35.7th percentile), scored 2026-09-30.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 36th percentile — 35.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.004 · newest: 0.004 · change: 0.000

Affected products

Hdfgroup Hdf5 — versions 1.14.6

Weakness classification (CWE)

CWE-122 — Heap-based Buffer Overflow

References

github.com/madao123123/crash_report/blob/main/hdf5_poc/hdf5_poc1.md (Exploit, Third Party Advisory)

Frequently asked questions

What is CVE-2025-44904?: CVE-2025-44904 is a high-severity vulnerability in Hdfgroup Hdf5, classified under Heap-based Buffer Overflow. CVSS score: 8.8/10. Published 2025-05-30.
How severe is CVE-2025-44904?: High severity. CVSS v3 base score is 8.8 out of 10.