CVE-2022-23219: The deprecated compatibility function clnt_create in the sunrpc module of the GNU C Library (aka glibc) throug

This week

CRITICAL 9.8REMOTEUPGRADEDOWNGRADEDOWNGRADE

CVE-2022-23219 is a critical-severity flaw (CVSS 9.8) affecting glibc, communications cloud native core binding support function, communications cloud native core network function cloud native environment. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

The deprecated compatibility function clnt_create in the sunrpc module of the GNU C Library (aka glibc) through 2.34 copies its hostname argument on the stack without validating its length, which may result in a buffer overflow, potentially resulting in a denial of service or (if an application is not built with a stack protector enabled) arbitrary code execution.

Why this priority

Critical severity
EPSS top 8%: very likely to be exploited
Public exploit reference
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	9.8 (Critical)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	4.7% (top 8%)
CISA exploited list	No
Weakness	CWE-120
Published	2022-01-14
Last modified	2026-10-14

Publisher (CNA): MITRE · Vendor: gnu · oracle

Last updated 2026-10-14 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2022-01-14 07:15 UTCPublished CVE record published
2026-10-14 16:17 UTCUpdated Record last modified

gnu glibc UPGRADE

Affected: < 2.31

Fixed in: 2.31

Safe to downgrade to: no unaffected older release

1. Check installed version

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

2. UPGRADE to 2.31 (Debian / Ubuntu)

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

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade glibc

Note

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

oracle communications cloud native core binding support function DOWNGRADE

Affected: 22.1.3

Fixed in: no fixed release known

Safe to downgrade to: a release before 22.1.3

1. Check installed version

apt-cache policy communications-cloud-native-core-binding-support-function || rpm -q communications-cloud-native-core-binding-support-function || communications-cloud-native-core-binding-support-function --version

2. No fixed release: DOWNGRADE to a release before 22.1.3 (Debian / Ubuntu)

apt-cache madison communications-cloud-native-core-binding-support-function sudo apt install communications-cloud-native-core-binding-support-function=<VERSION_BEFORE_22.1.3> sudo apt-mark hold communications-cloud-native-core-binding-support-function

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

dnf --showduplicates list communications-cloud-native-core-binding-support-function sudo dnf downgrade communications-cloud-native-core-binding-support-function-<VERSION_BEFORE_22.1.3> sudo dnf versionlock add communications-cloud-native-core-binding-support-function

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.

oracle communications cloud native core network function cloud native environment DOWNGRADE

Affected: 22.1.0

Fixed in: no fixed release known

Safe to downgrade to: a release before 22.1.0

1. Check installed version

apt-cache policy communications-cloud-native-core-network-function-cloud-native-environment || rpm -q communications-cloud-native-core-network-function-cloud-native-environment || communications-cloud-native-core-network-function-cloud-native-environment --version

2. No fixed release: DOWNGRADE to a release before 22.1.0 (Debian / Ubuntu)

apt-cache madison communications-cloud-native-core-network-function-cloud-native-environment sudo apt install communications-cloud-native-core-network-function-cloud-native-environment=<VERSION_BEFORE_22.1.0> sudo apt-mark hold communications-cloud-native-core-network-function-cloud-native-environment

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

dnf --showduplicates list communications-cloud-native-core-network-function-cloud-native-environment sudo dnf downgrade communications-cloud-native-core-network-function-cloud-native-environment-<VERSION_BEFORE_22.1.0> sudo dnf versionlock add communications-cloud-native-core-network-function-cloud-native-environment

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.

oracle communications cloud native core network repository function DOWNGRADE

Affected: 22.1.2 · 22.2.0

Fixed in: no fixed release known

Safe to downgrade to: a release before 22.1.2

1. Check installed version

apt-cache policy communications-cloud-native-core-network-repository-function || rpm -q communications-cloud-native-core-network-repository-function || communications-cloud-native-core-network-repository-function --version

2. No fixed release: DOWNGRADE to a release before 22.1.2 (Debian / Ubuntu)

apt-cache madison communications-cloud-native-core-network-repository-function sudo apt install communications-cloud-native-core-network-repository-function=<VERSION_BEFORE_22.1.2> sudo apt-mark hold communications-cloud-native-core-network-repository-function

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

dnf --showduplicates list communications-cloud-native-core-network-repository-function sudo dnf downgrade communications-cloud-native-core-network-repository-function-<VERSION_BEFORE_22.1.2> sudo dnf versionlock add communications-cloud-native-core-network-repository-function

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.

oracle communications cloud native core security edge protection proxy DOWNGRADE

Affected: 22.1.1

Fixed in: no fixed release known

Safe to downgrade to: a release before 22.1.1

1. Check installed version

apt-cache policy communications-cloud-native-core-security-edge-protection-proxy || rpm -q communications-cloud-native-core-security-edge-protection-proxy || communications-cloud-native-core-security-edge-protection-proxy --version

2. No fixed release: DOWNGRADE to a release before 22.1.1 (Debian / Ubuntu)

apt-cache madison communications-cloud-native-core-security-edge-protection-proxy sudo apt install communications-cloud-native-core-security-edge-protection-proxy=<VERSION_BEFORE_22.1.1> sudo apt-mark hold communications-cloud-native-core-security-edge-protection-proxy

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

dnf --showduplicates list communications-cloud-native-core-security-edge-protection-proxy sudo dnf downgrade communications-cloud-native-core-security-edge-protection-proxy-<VERSION_BEFORE_22.1.1> sudo dnf versionlock add communications-cloud-native-core-security-edge-protection-proxy

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.

oracle communications cloud native core unified data repository DOWNGRADE

Affected: 22.2.0

Fixed in: no fixed release known

Safe to downgrade to: a release before 22.2.0

1. Check installed version

apt-cache policy communications-cloud-native-core-unified-data-repository || rpm -q communications-cloud-native-core-unified-data-repository || communications-cloud-native-core-unified-data-repository --version

2. No fixed release: DOWNGRADE to a release before 22.2.0 (Debian / Ubuntu)

apt-cache madison communications-cloud-native-core-unified-data-repository sudo apt install communications-cloud-native-core-unified-data-repository=<VERSION_BEFORE_22.2.0> sudo apt-mark hold communications-cloud-native-core-unified-data-repository

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

dnf --showduplicates list communications-cloud-native-core-unified-data-repository sudo dnf downgrade communications-cloud-native-core-unified-data-repository-<VERSION_BEFORE_22.2.0> sudo dnf versionlock add communications-cloud-native-core-unified-data-repository

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-2022-23219?

glibc: upgrade to 2.31; communications cloud native core binding support function: downgrade or apply the listed mitigation; communications cloud native core network function cloud native environment: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2022-23219 being exploited?

CVE-2022-23219 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-2022-23219 affect?

CVE-2022-23219 affects glibc, communications cloud native core binding support function, communications cloud native core network function cloud native environment. Severity is critical (CVSS 9.8). The deprecated compatibility function clnt_create in the sunrpc module of the GNU C Library (aka glibc) through 2.34 copies its hostname argument on the stack without validating its length, which may result in a buffer overflow, potentially

How urgent is CVE-2022-23219?

Priority 67/100. Critical severity; EPSS top 8%: very likely to be exploited; Public exploit reference; Remotely exploitable, no login, no user action

Software pages

glibc vulnerabilities

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References

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