What is CVE-2017-17509?

CVE-2017-17509 is a high-severity vulnerability in Hdfgroup Hdf5, classified under Out-of-bounds Write. CVSS score: 8.8/10. Published 2017-12-11.

How severe is CVE-2017-17509?

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

Is CVE-2017-17509 known to be exploited?

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

Buffer overflow in Hdfgroup Hdf5

CVE-2017-17509

In HDF5 1.10.1, there is an out of bounds write vulnerability in the function H5G__ent_decode_vec in H5Gcache.c in libhdf5.a. For example, h5dump would crash or possibly have unspecified other impact someone opens a crafted hdf5 file.

Vulnerability class: Buffer Overflow

Published 2017-12-11 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 8.8 (High). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.015 (73.4th percentile), scored 2026-09-30.

Low probability of exploitation in the next 30 days, but still tracked. 73rd percentile — 73.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.015 · newest: 0.015 · change: 0.000

Affected products

Hdfgroup Hdf5 — versions 1.10.1

Weakness classification (CWE)

CWE-787 — Out-of-bounds Write

Public proof-of-concept exploits

References

github.com/xiaoqx/pocs/tree/master/hdf5/readme.md (Third Party Advisory)

Frequently asked questions

What is CVE-2017-17509?: CVE-2017-17509 is a high-severity vulnerability in Hdfgroup Hdf5, classified under Out-of-bounds Write. CVSS score: 8.8/10. Published 2017-12-11.
How severe is CVE-2017-17509?: High severity. CVSS v3 base score is 8.8 out of 10.
Is CVE-2017-17509 known to be exploited?: 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.