What is CVE-2024-33874?

CVE-2024-33874 is a critical-severity vulnerability in Hdfgroup Hdf5, classified under Buffer Copy without Checking Size of Input (Classic Buffer Overflow). CVSS score: 9.8/10. Published 2024-05-14.

How severe is CVE-2024-33874?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Buffer overflow in Hdfgroup Hdf5

CVE-2024-33874

HDF5 Library through 1.14.3 has a heap buffer overflow in H5O__mtime_new_encode in H5Omtime.c.

Vulnerability class: Buffer Overflow

Published 2024-05-14 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.009 (59.0th percentile), scored 2026-10-01.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 59th percentile — 59.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.009 · newest: 0.009 · change: 0.000

Affected products

Hdfgroup Hdf5

Weakness classification (CWE)

CWE-120 — Buffer Copy without Checking Size of Input (Classic Buffer Overflow)

References

www.hdfgroup.org/2024/05/new-hdf5-cve-issues-fixed-in-1-14-4/ (Issue Tracking, Vendor Advisory)

Frequently asked questions

What is CVE-2024-33874?: CVE-2024-33874 is a critical-severity vulnerability in Hdfgroup Hdf5, classified under Buffer Copy without Checking Size of Input (Classic Buffer Overflow). CVSS score: 9.8/10. Published 2024-05-14.
How severe is CVE-2024-33874?: Critical severity. CVSS v3 base score is 9.8 out of 10.