CVE-2017-1000376: libffi requests an executable stack allowing attackers to more easily trigger arbitrary code execution by over

This month

HIGH 7.0WATCHLISTMITIGATEDOWNGRADEMITIGATE

CVE-2017-1000376 is a high-severity flaw (CVSS 7.0) affecting enterprise virtualization server, openshift, enterprise linux. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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.

Why this priority

High severity
On your watchlist

A fixed release or distro patch exists.

Risk facts

CVSS score	7.0 (High)
Attack vector	Local
Attack complexity	High
Privileges needed	Low
User interaction	None
EPSS exploit chance	0.5% (top 57%)
CISA exploited list	No
Weakness	CWE-119
Published	2017-06-19
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: debian · libffi project · oracle · redhat

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2017-06-19 16:29 UTCPublished CVE record published
2026-06-17 00:59 UTCUpdated Record last modified

redhat enterprise virtualization server MITIGATE

Affected: all versions

Fixed in: no fixed release known

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy enterprise-virtualization-server || rpm -q enterprise-virtualization-server || enterprise-virtualization-server --version

No fixed or unaffected release known

Apply the vendor mitigation from the advisory, disable the affected feature, or restrict network access.

redhat openshift DOWNGRADE

Affected: 2.0

Fixed in: no fixed release known

Safe to downgrade to: a release before 2.0

1. Check installed version

apt-cache policy openshift || rpm -q openshift || openshift --version

2. No fixed release: DOWNGRADE to a release before 2.0 (Debian / Ubuntu)

apt-cache madison openshift sudo apt install openshift=<VERSION_BEFORE_2.0> sudo apt-mark hold openshift

2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list openshift sudo dnf downgrade openshift-<VERSION_BEFORE_2.0> sudo dnf versionlock add openshift

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

redhat enterprise linux MITIGATE

Affected: 6.0 · 7.0

Fixed in: no fixed release known

Safe to downgrade to: a release before 6.0

Check your OS release

cat /etc/os-release; uname -r

Debian / Ubuntu

sudo apt update && sudo apt full-upgrade

RHEL / Amazon Linux / Fedora

sudo dnf upgrade --refresh

Windows

Install the latest cumulative update from Windows Update

If no patch exists yet

OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.

debian debian linux MITIGATE

Affected: 8.0 · 9.0

Fixed in: no fixed release known

Safe to downgrade to: a release before 8.0

Check your OS release

cat /etc/os-release; uname -r

Debian / Ubuntu

sudo apt update && sudo apt full-upgrade

RHEL / Amazon Linux / Fedora

sudo dnf upgrade --refresh

Windows

Install the latest cumulative update from Windows Update

If no patch exists yet

OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.

libffi project libffi UPGRADE

Affected: < 3.2

Fixed in: 3.2

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy libffi || rpm -q libffi || libffi --version

2. UPGRADE to 3.2 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade libffi

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade libffi

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

oracle peopletools DOWNGRADE

Affected: 8.56 · 8.57

Fixed in: no fixed release known

Safe to downgrade to: a release before 8.56

1. Check installed version

apt-cache policy peopletools || rpm -q peopletools || peopletools --version

2. No fixed release: DOWNGRADE to a release before 8.56 (Debian / Ubuntu)

apt-cache madison peopletools sudo apt install peopletools=<VERSION_BEFORE_8.56> sudo apt-mark hold peopletools

2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list peopletools sudo dnf downgrade peopletools-<VERSION_BEFORE_8.56> sudo dnf versionlock add peopletools

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2017-1000376?

enterprise virtualization server: mitigate or apply the listed mitigation; openshift: downgrade or apply the listed mitigation; enterprise linux: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2017-1000376 being exploited?

CVE-2017-1000376 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2017-1000376 affect?

CVE-2017-1000376 affects enterprise virtualization server, openshift, enterprise linux. Severity is high (CVSS 7.0). 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 libf

How urgent is CVE-2017-1000376?

Priority 40/100. High severity; On your watchlist

Software pages

Debian vulnerabilities · Red Hat OpenShift vulnerabilities

References

← Back to latest CVEs