What is CVE-2018-13876?

CVE-2018-13876 is a critical-severity vulnerability in Hdfgroup Hdf5, classified under Out-of-bounds Write. CVSS score: 9.8/10. Published 2018-07-10.

How severe is CVE-2018-13876?

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

Is CVE-2018-13876 known to be exploited?

1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Buffer overflow in Hdfgroup Hdf5

CVE-2018-13876

An issue was discovered in the HDF HDF5 1.8.20 library. There is a stack-based buffer overflow in the function H5FD_sec2_read in H5FDsec2.c, related to HDread.

Vulnerability class: Buffer Overflow

Published 2018-07-10 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.023 (83.3th percentile), scored 2026-11-01.

Low probability of exploitation in the next 30 days, but still tracked. 83rd percentile — 83.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.023 · newest: 0.023 · change: +0.000

Affected products

Hdfgroup Hdf5 — versions 1.8.20

Weakness classification (CWE)

CWE-787 — Out-of-bounds Write

Public proof-of-concept exploits

xiaoqx/pocs

References

github.com/TeamSeri0us/pocs/tree/master/hdf5 (Exploit, Third Party Advisory)

Frequently asked questions

What is CVE-2018-13876?: CVE-2018-13876 is a critical-severity vulnerability in Hdfgroup Hdf5, classified under Out-of-bounds Write. CVSS score: 9.8/10. Published 2018-07-10.
How severe is CVE-2018-13876?: Critical severity. CVSS v3 base score is 9.8 out of 10.
Is CVE-2018-13876 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.