What is CVE-2017-1000376?

CVE-2017-1000376 is a high-severity vulnerability in Libffi Project, classified under Improper Restriction of Operations within the Bounds of a Memory Buffer. CVSS score: 7.0/10. Published 2017-06-19.

How severe is CVE-2017-1000376?

High severity. CVSS v3 base score is 7.0 out of 10.

Is CVE-2017-1000376 known to be exploited?

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

Buffer overflow in Libffi Project

CVE-2017-1000376

libffi requests an executable stack allowing attackers to more easily trigger arbitrary code execution by overwriting the stack. Please note that libffi is used by a number of other libraries. It was previously stated that this affects libffi version 3.2.1 but this appears to be incorrect. libffi prior to version 3.1 on 32 bit x86 systems was vulnerable, and upstream is believed to have fixed this issue in version 3.1.

Vulnerability class: Buffer Overflow

Published 2017-06-19 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 7.0 (High). Vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.005 (40.6th percentile), scored 2026-09-30.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 41st percentile — 40.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.005 · newest: 0.005 · change: 0.000

Affected products

Libffi Project
Oracle Peopletools — versions 8.56, 8.57
Debian Linux — versions 8.0, 9.0
Red Hat Enterprise Linux — versions 6.0, 7.0
Red Hat Enterprise Virtualization Server
Red Hat Openshift — versions 2.0

Weakness classification (CWE)

CWE-119 — Improper Restriction of Operations within the Bounds of a Memory Buffer

Public proof-of-concept exploits

References

www.qualys.com/2017/06/19/stack-clash/stack-clash.txt (Mailing List, Third Party Advisory)
access.redhat.com/security/cve/CVE-2017-1000376 (Third Party Advisory)
www.debian.org/security/2017/dsa-3889 (vendor-advisory, Third Party Advisory)
www.oracle.com/security-alerts/cpujan2020.html (Third Party Advisory)

Frequently asked questions

What is CVE-2017-1000376?: CVE-2017-1000376 is a high-severity vulnerability in Libffi Project, classified under Improper Restriction of Operations within the Bounds of a Memory Buffer. CVSS score: 7.0/10. Published 2017-06-19.
How severe is CVE-2017-1000376?: High severity. CVSS v3 base score is 7.0 out of 10.
Is CVE-2017-1000376 known to be exploited?: 4 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.