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vulnerability

CVE-2018-14634

7.8
High
KEV · Exploited in wildEPSS 15%Patch available

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.

exploited
Yes, in CISA KEV since 26 Jan 2026fix by 16 Feb 2026 (CISA deadline for US federal agencies)public exploit code
fix
Patch available see the advisory in the references
likelihood
EPSS 14.7%
Published 25 Sept 2018Analysed here 2 Nov 2026CVSS scored by the publisher (CNA)

do firstApply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.

triage
server-sideruntimeWAF can block: noAV · localCWE-190· Integer Overflow

Can a WAF block it? No. The attack needs local access to the machine, so a WAF is not on its path.

Also consider: patch

Based on the attack vector (local or physical access). We check Cloudflare, AWS, Google Cloud Armor and Azure; for Akamai, Imperva, Fastly, F5, ask your vendor.

cvss vector
attack vectorlocalattack complexitylowprivileges requiredlowuser interactionnonescopeunchangedconfidentialityhighintegrityhighavailabilityhigh
CVSS 3.0 · CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
common questions

Is CVE-2018-14634 being exploited?

Yes. CVE-2018-14634 appears in CISA's Known Exploited Vulnerabilities catalog, which means exploitation in the wild has been confirmed and reported. Treat it as active rather than theoretical, and patch it ahead of higher-scoring vulnerabilities that carry no exploitation evidence.

How severe is CVE-2018-14634?

CVE-2018-14634 is rated High with a CVSS score of 7.8. Severity describes how bad exploitation would be, not how likely it is: pair it with exploitation evidence before deciding what to patch first.

Is there a patch for CVE-2018-14634?

Yes. A fix has been recorded for CVE-2018-14634. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.

What does CVE-2018-14634 affect?

CVE-2018-14634 affects paloaltonetworks:pan-os, f5:big-ip_access_policy_manager, f5:big-ip_advanced_firewall_manager, f5:big-ip_analytics, and 24 further products or versions. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.

Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.

executive summary
technical analysis
affected
paloaltonetworks:pan-osf5:big-ip_access_policy_managerf5:big-ip_advanced_firewall_managerf5:big-ip_analyticsf5:big-ip_application_acceleration_managerf5:big-ip_application_security_managerf5:big-ip_domain_name_systemf5:big-ip_edge_gatewayf5:big-ip_fraud_protection_servicef5:big-ip_global_traffic_managerf5:big-ip_link_controllerf5:big-ip_local_traffic_managerf5:big-ip_policy_enforcement_managerf5:big-ip_webacceleratorf5:big-iq_centralized_managementf5:big-iq_cloud_and_orchestrationf5:enterprise_managerf5:iworkflowf5:traffix_signaling_delivery_controllerlinux:linux_kernelredhat:enterprise_linux_desktopredhat:enterprise_linux_serverredhat:enterprise_linux_server_ausredhat:enterprise_linux_server_eusredhat:enterprise_linux_server_tusredhat:enterprise_linux_workstationcanonical:ubuntu_linuxnetapp:snapprotect
affected versions
The Linux Foundation kernel
  • affected2.6.x, 3.10.x, 4.14.x

As published in the CVE Program record. A version outside these ranges is not a statement that it is unaffected — vendors sometimes understate a range, and distribution-backported builds carry upstream numbers that do not reflect what was patched into them.

public exploits

Public exploit code: 1 on Exploit-DB · 1 GitHub proof of concept

GitHub proofs of concept

Listed so you can judge urgency, not as a recommendation to run anything. GitHub “proofs of concept” are unvetted: some are fake or carry malware. Exploit-DB marks the entries its staff verified.

cisa ssvc

exploitation
active
automatable
no
technical impact
total

Assessed by CISA 27 Jan 2026 (SSVC 2.0.3).

timeline

  1. 25 Sept 2018Published
  2. 26 Sept 2018First public exploit or proof of concept · same day later
  3. 26 Jan 2026Added to CISA KEV (exploited in the wild) · 2,679 days (about 7 years) later
  4. 27 Jan 2026CISA SSVC assessment: exploitation active · 1 day later
  5. 27 Jan 2026CVE record last updated · same day later
  6. 16 Feb 2026CISA remediation due date (US federal agencies) · 19 days later
  7. 2 Nov 2026Analysed by vulneraibility.com · 260 days (about 9 months) later
how to fix
Remediation steps are tailored for users whose stack is affected. Add this technology to your stack to see the fix checklist.
references
NVDCVE.orgCVE DetailsSource
23 references in the CVE record: 14 advisories, 1 exploit, 8 links
Show 15 more

sources

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