CVE-2018-14634: Linux Kernel Integer Overflow Vulnerability

Patch now

HIGH 7.8EXPLOITEDWATCHLISTUPGRADEUPGRADEUPGRADE

CVE-2018-14634 is a high-severity flaw (CVSS 7.8) affecting pan-os, big-ip access policy manager, big-ip advanced firewall manager, reported as exploited in the wild. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

An integer overflow flaw was found in the Linux kernel's create_elf_tables() function. An unprivileged local user with access to SUID (or otherwise privileged) binary could use this flaw to escalate their privileges on the system. Kernel versions 2.6.x, 3.10.x and 4.14.x are believed to be vulnerable.

Why this priority

High severity
EPSS top 3%: very likely to be exploited
Exploited in the wild (CISA KEV)
Public exploit reference
On your watchlist

A fixed release or distro patch exists.

Risk facts

CVSS score	7.8 (High)
Attack vector	Local
Attack complexity	Low
Privileges needed	Low
User interaction	None
EPSS exploit chance	14.7% (top 3%)
CISA exploited list	Yes, fix due 2026-02-16
Weakness	CWE-190
Published	2018-09-25
Last modified	2026-06-17

Publisher (CNA): Red Hat, Inc. · Vendor: f5 · paloaltonetworks

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

Am I affected?

Timeline

2018-09-25 21:29 UTCPublished CVE record published
2026-01-26Exploited Added to the CISA Known Exploited Vulnerabilities list
2026-02-16Deadline CISA due date for US federal agencies to patch
2026-06-17 01:41 UTCUpdated Record last modified

paloaltonetworks pan-os UPGRADE

Affected: >= 7.1.0 and < 7.1.23 · >= 8.0.0 and < 8.0.16 · >= 8.1.0 and < 8.1.7

Fixed in: 7.1.23, 8.0.16, 8.1.7

Safe to downgrade to: a release before 7.1.0

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.

f5 big-ip access policy manager UPGRADE

Affected: >= 11.2.1 and < 11.6.4 · >= 12.1.0 and < 12.1.5 · >= 13.0.0 and < 13.1.1.5 · >= 14.0.0 and < 14.0.1.1 · >= 14.1.0 and < 14.1.0.6

Fixed in: 11.6.4, 12.1.5, 13.1.1.5, 14.0.1.1, 14.1.0.6

Safe to downgrade to: a release before 11.2.1

1. Check installed version

apt-cache policy big-ip-access-policy-manager || rpm -q big-ip-access-policy-manager || big-ip-access-policy-manager --version

2. UPGRADE to 11.6.4 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade big-ip-access-policy-manager

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade big-ip-access-policy-manager

Note

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

3. If no update is available yet, DOWNGRADE to a release before 11.2.1 (Debian / Ubuntu)

apt-cache madison big-ip-access-policy-manager sudo apt install big-ip-access-policy-manager=<VERSION_BEFORE_11.2.1> sudo apt-mark hold big-ip-access-policy-manager

3. If no update is available yet, DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list big-ip-access-policy-manager sudo dnf downgrade big-ip-access-policy-manager-<VERSION_BEFORE_11.2.1> sudo dnf versionlock add big-ip-access-policy-manager

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.

f5 big-ip advanced firewall manager UPGRADE

Affected: >= 11.2.1 and < 11.6.4 · >= 12.1.0 and < 12.1.5 · >= 13.0.0 and < 13.1.1.5 · >= 14.0.0 and < 14.0.1.1 · >= 14.1.0 and < 14.1.0.6

Fixed in: 11.6.4, 12.1.5, 13.1.1.5, 14.0.1.1, 14.1.0.6

Safe to downgrade to: a release before 11.2.1

1. Check installed version

apt-cache policy big-ip-advanced-firewall-manager || rpm -q big-ip-advanced-firewall-manager || big-ip-advanced-firewall-manager --version

2. UPGRADE to 11.6.4 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade big-ip-advanced-firewall-manager

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade big-ip-advanced-firewall-manager

Note

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

3. If no update is available yet, DOWNGRADE to a release before 11.2.1 (Debian / Ubuntu)

apt-cache madison big-ip-advanced-firewall-manager sudo apt install big-ip-advanced-firewall-manager=<VERSION_BEFORE_11.2.1> sudo apt-mark hold big-ip-advanced-firewall-manager

3. If no update is available yet, DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list big-ip-advanced-firewall-manager sudo dnf downgrade big-ip-advanced-firewall-manager-<VERSION_BEFORE_11.2.1> sudo dnf versionlock add big-ip-advanced-firewall-manager

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.

f5 big-ip analytics UPGRADE

Affected: >= 11.2.1 and < 11.6.4 · >= 12.1.0 and < 12.1.5 · >= 13.0.0 and < 13.1.1.5 · >= 14.0.0 and < 14.0.1.1 · >= 14.1.0 and < 14.1.0.6

Fixed in: 11.6.4, 12.1.5, 13.1.1.5, 14.0.1.1, 14.1.0.6

Safe to downgrade to: a release before 11.2.1

1. Check installed version

apt-cache policy big-ip-analytics || rpm -q big-ip-analytics || big-ip-analytics --version

2. UPGRADE to 11.6.4 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade big-ip-analytics

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade big-ip-analytics

Note

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

3. If no update is available yet, DOWNGRADE to a release before 11.2.1 (Debian / Ubuntu)

apt-cache madison big-ip-analytics sudo apt install big-ip-analytics=<VERSION_BEFORE_11.2.1> sudo apt-mark hold big-ip-analytics

3. If no update is available yet, DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list big-ip-analytics sudo dnf downgrade big-ip-analytics-<VERSION_BEFORE_11.2.1> sudo dnf versionlock add big-ip-analytics

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.

f5 big-ip application acceleration manager UPGRADE

Affected: >= 11.2.1 and < 11.6.4 · >= 12.1.0 and < 12.1.5 · >= 13.0.0 and < 13.1.1.5 · >= 14.0.0 and < 14.0.1.1 · >= 14.1.0 and < 14.1.0.6

Fixed in: 11.6.4, 12.1.5, 13.1.1.5, 14.0.1.1, 14.1.0.6

Safe to downgrade to: a release before 11.2.1

1. Check installed version

apt-cache policy big-ip-application-acceleration-manager || rpm -q big-ip-application-acceleration-manager || big-ip-application-acceleration-manager --version

2. UPGRADE to 11.6.4 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade big-ip-application-acceleration-manager

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade big-ip-application-acceleration-manager

Note

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

3. If no update is available yet, DOWNGRADE to a release before 11.2.1 (Debian / Ubuntu)

apt-cache madison big-ip-application-acceleration-manager sudo apt install big-ip-application-acceleration-manager=<VERSION_BEFORE_11.2.1> sudo apt-mark hold big-ip-application-acceleration-manager

3. If no update is available yet, DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list big-ip-application-acceleration-manager sudo dnf downgrade big-ip-application-acceleration-manager-<VERSION_BEFORE_11.2.1> sudo dnf versionlock add big-ip-application-acceleration-manager

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.

f5 big-ip application security manager UPGRADE

Affected: >= 11.2.1 and < 11.6.4 · >= 12.1.0 and < 12.1.5 · >= 13.0.0 and < 13.1.1.5 · >= 14.0.0 and < 14.0.1.1 · >= 14.1.0 and < 14.1.0.6

Fixed in: 11.6.4, 12.1.5, 13.1.1.5, 14.0.1.1, 14.1.0.6

Safe to downgrade to: a release before 11.2.1

1. Check installed version

apt-cache policy big-ip-application-security-manager || rpm -q big-ip-application-security-manager || big-ip-application-security-manager --version

2. UPGRADE to 11.6.4 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade big-ip-application-security-manager

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade big-ip-application-security-manager

Note

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

3. If no update is available yet, DOWNGRADE to a release before 11.2.1 (Debian / Ubuntu)

apt-cache madison big-ip-application-security-manager sudo apt install big-ip-application-security-manager=<VERSION_BEFORE_11.2.1> sudo apt-mark hold big-ip-application-security-manager

3. If no update is available yet, DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list big-ip-application-security-manager sudo dnf downgrade big-ip-application-security-manager-<VERSION_BEFORE_11.2.1> sudo dnf versionlock add big-ip-application-security-manager

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.

Exact fixes by distribution

Fedora 46 · copyparty · FIXED · 1.20.26-1.fc46 · FEDORA-2026-8fbe18458e · source

sudo dnf upgrade --advisory=FEDORA-2026-8fbe18458e

Fedora ELN · man-pages · FIXED · 6.20-1.eln159 · FEDORA-2026-f1f5fb11b4 · source

sudo dnf upgrade --advisory=FEDORA-2026-f1f5fb11b4

Ubuntu 22.04 · linux-aws-fips · NOT AFFECTED

Ubuntu 20.04 · linux-aws-fips · NOT AFFECTED

Ubuntu 22.04 · linux-azure-fips · NOT AFFECTED

Ubuntu 20.04 · linux-azure-fips · NOT AFFECTED

Ubuntu 22.04 · linux-gcp-fips · NOT AFFECTED

Debian 12 · linux · FIXED · 4.12.6-1

sudo apt update && sudo apt install --only-upgrade linux dpkg --compare-versions "$(dpkg-query -W -f='${Version}' linux)" ge "4.12.6-1" && echo PATCHED || echo STILL-VULNERABLE

Debian 13 · linux · FIXED · 4.12.6-1

sudo apt update && sudo apt install --only-upgrade linux dpkg --compare-versions "$(dpkg-query -W -f='${Version}' linux)" ge "4.12.6-1" && echo PATCHED || echo STILL-VULNERABLE

RHEL 6 · kernel · FIXED · kernel-2.6.32-754.6.3.el6

sudo dnf upgrade --advisory=RHSA-2018:2846 rpm -q kernel

RHEL 6.4 Advanced Update Support · kernel · FIXED · kernel-2.6.32-358.94.1.el6

sudo dnf upgrade --advisory=RHSA-2018:3643 rpm -q kernel

RHEL 6.5 Advanced Update Support · kernel · FIXED · kernel-2.6.32-431.93.2.el6

sudo dnf upgrade --advisory=RHSA-2018:2933 rpm -q kernel

RHEL 6.6 Advanced Update Support · kernel · FIXED · kernel-2.6.32-504.76.2.el6

sudo dnf upgrade --advisory=RHSA-2018:2924 rpm -q kernel

RHEL 6.6 Telco Extended Update Support · kernel · FIXED · kernel-2.6.32-504.76.2.el6

sudo dnf upgrade --advisory=RHSA-2018:2924 rpm -q kernel

Amazon Linux 1 · see advisory · FIXED · ALAS-2018-1087 · source

sudo yum update --advisory=ALAS-2018-1087

Public exploits and detection

Public code exists for this CVE. Treat unpatched systems as at risk, and only run PoCs in a lab.

GitHub PoC: luan0ap/cve-2018-14634 (8 stars)
Write-up: www.exploit-db.com/exploits/45516/
Write-up: www.openwall.com/lists/oss-security/2018/09/25/4
Exploit-DB: Linux Kernel 2.6.x / 3.10.x / 4.14.x (RedHat / Debian / CentOS) (x64) - 'Mutagen Astronomy' Local Privilege Escalation

Verify at the official source NVD · CVE Program · CISA KEV catalog · 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-2018-14634?

pan-os: upgrade to 7.1.23, 8.0.16, 8.1.7; big-ip access policy manager: upgrade to 11.6.4, 12.1.5, 13.1.1.5, 14.0.1.1, 14.1.0.6; big-ip advanced firewall manager: upgrade to 11.6.4, 12.1.5, 13.1.1.5, 14.0.1.1, 14.1.0.6. Exact commands for each OS are on this page.

Is CVE-2018-14634 being exploited?

Yes. CVE-2018-14634 is on the CISA Known Exploited Vulnerabilities list, so treat it as patch-now.

What does CVE-2018-14634 affect?

CVE-2018-14634 affects pan-os, big-ip access policy manager, big-ip advanced firewall manager. Severity is high (CVSS 7.8). An integer overflow flaw was found in the Linux kernel's create_elf_tables() function. An unprivileged local user with access to SUID (or otherwise privileged) binary could use this flaw to escalate their privileges on the system. Kernel ve

How urgent is CVE-2018-14634?

Priority 86/100. High severity; EPSS top 3%: very likely to be exploited; Exploited in the wild (CISA KEV); Public exploit reference; On your watchlist

Software pages

Linux kernel vulnerabilities · Palo Alto PAN-OS vulnerabilities · F5 BIG-IP vulnerabilities

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References

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