---
title: "CVE-2018-14634: Linux Kernel Integer Overflow Vulnerability"
url: https://erroneo.us/security/cve/CVE-2018-14634/
description: "CVE-2018-14634 (Linux Kernel): Exploited in the wild (CISA KEV). An integer overflow flaw was found in the Linux kernel's createelftables() function. An…"
type: vulnerability-record
section: "Security Digest"
date_published: 2018-09-25
date_modified: 2026-01-27
publisher: erroneo.us
author: erroneo.us Security Desk
cve: "CVE-2018-14634"
kev: true
cvss: 7.8
epss: 0.14689
license: All rights reserved. Quote with attribution and a link.
---

# CVE-2018-14634: Linux Kernel Integer Overflow Vulnerability

**Signal:** Exploited: patch now if you run it. CISA has confirmed exploitation in the wild. (Computed from CISA KEV, EPSS and CVSS; not an editorial verdict.)

## Should you act?

- Yes, if you run Linux Kernel. CISA added this CVE to its Known Exploited Vulnerabilities catalog on 2026-01-26, which means there is reliable evidence of exploitation in the wild. US federal agencies must remediate by 2026-02-16 ; treat that as the outer limit, not the target.
- EPSS 14.7% , percentile 97: FIRST’s model estimates a 14.7% chance of exploitation activity in the next 30 days, higher than 97% of all scored CVEs (very high). EPSS is a probability, not a verdict.
- Needs local access needed. Lower urgency for most teams unless an attacker could already run code on the machine.

## What it is

An integer overflow flaw was found in the Linux kernel's createelftables() 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.

## Affected products (CVE record)

- The Linux Foundation kernel: 2.6.x, 3.10.x, 4.14.x

## Severity

- redhat CVSS 3.0: 7.8 `CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H`

## Exploitation

- CISA KEV: added 2026-01-26; federal due date 2026-02-16. Known ransomware use: Unknown.
- CISA required action: Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
- CISA SSVC assessment: exploitation active , automatable no , technical impact total .
- FIRST EPSS (model of 2026-10-21): 14.69% probability of exploitation activity in the next 30 days; percentile 97.

## Sources

- [RHSA-2018:3540](https://access.redhat.com/errata/RHSA-2018:3540)
- [RHSA-2018:2925](https://access.redhat.com/errata/RHSA-2018:2925)
- [RHSA-2018:3591](https://access.redhat.com/errata/RHSA-2018:3591)
- [USN-3775-1](https://usn.ubuntu.com/3775-1/)
- [RHSA-2018:2933](https://access.redhat.com/errata/RHSA-2018:2933)
- [USN-3779-1](https://usn.ubuntu.com/3779-1/)
- [RHSA-2018:2748](https://access.redhat.com/errata/RHSA-2018:2748)
- [RHSA-2018:3590](https://access.redhat.com/errata/RHSA-2018:3590)
- [USN-3775-2](https://usn.ubuntu.com/3775-2/)
- [RHSA-2018:2763](https://access.redhat.com/errata/RHSA-2018:2763)
- [RHSA-2018:2924](https://access.redhat.com/errata/RHSA-2018:2924)
- [RHSA-2018:3586](https://access.redhat.com/errata/RHSA-2018:3586)
- [RHSA-2018:3643](https://access.redhat.com/errata/RHSA-2018:3643)
- [RHSA-2018:2846](https://access.redhat.com/errata/RHSA-2018:2846)
- [Listed in CISA KEV notes (git.kernel.org)](https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/about/)
- [Listed in CISA KEV notes (kernel.org)](https://www.kernel.org/)
- [CVE.org record CVE-2018-14634](https://www.cve.org/CVERecord?id=CVE-2018-14634)
- [NVD entry CVE-2018-14634](https://nvd.nist.gov/vuln/detail/CVE-2018-14634)
- [CISA Known Exploited Vulnerabilities catalog entry](https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2018-14634)
- [security.netapp.com](https://security.netapp.com/advisory/ntap-20190204-0002/)
- [45516](https://www.exploit-db.com/exploits/45516/)
- [105407](http://www.securityfocus.com/bid/105407)
- [[oss-security] 20180925 Integer overflow in Linux's create_elf_tables() (CVE-2018-14634)](https://www.openwall.com/lists/oss-security/2018/09/25/4)
- [bugzilla.redhat.com](https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-14634)
- [support.f5.com](https://support.f5.com/csp/article/K20934447?utm_source=f5support&amp%3Butm_medium=RSS)
- [security.paloaltonetworks.com](https://security.paloaltonetworks.com/CVE-2018-14634)
- [[oss-security] 20210720 CVE-2021-33910: Denial of service (stack exhaustion) in systemd (PID 1)](http://www.openwall.com/lists/oss-security/2021/07/20/2)

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Source page: https://erroneo.us/security/cve/CVE-2018-14634/ · Security Digest: https://erroneo.us/security/ · More: https://erroneo.us/llms.txt