CVE-2018-18653

Name: CVE-2018-18653
Creator: NVD / NIST
Published: 2018-10-26T00:29:00.237+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

UnknownEPSS 0.31%

Last modified Jun 17, 2026

CVE-2018-18653 is a vulnerability of currently unknown severity. The Linux kernel, as used in Ubuntu 18.10 and when booted with UEFI Secure Boot enabled, allows privileged local users to bypass intended Secure Boot restrictions and execute untrusted code by loading arbitrary kernel modules. This occurs because a modified kernel/module.c, in conjunction with certain configuration options, leads to mishandling of the result of signature verification.. EPSS estimates a 0.31% chance of exploitation in the next 30 days.

Description

The Linux kernel, as used in Ubuntu 18.10 and when booted with UEFI Secure Boot enabled, allows privileged local users to bypass intended Secure Boot restrictions and execute untrusted code by loading arbitrary kernel modules. This occurs because a modified kernel/module.c, in conjunction with certain configuration options, leads to mishandling of the result of signature verification.

Metrics

EPSS Probability

0.31%

22.8th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-347

Affected Software

Vendor	Product	Versions
Canonical	Ubuntu Linux	18.10

References

https://launchpad.net/bugs/1798863Exploit, Issue Tracking, Vendor Advisory
https://usn.ubuntu.com/3832-1/Patch, Vendor Advisory
https://usn.ubuntu.com/3835-1/Patch, Vendor Advisory
https://launchpad.net/bugs/1798863Exploit, Issue Tracking, Vendor Advisory
https://usn.ubuntu.com/3832-1/Patch, Vendor Advisory
https://usn.ubuntu.com/3835-1/Patch, Vendor Advisory

Timeline

Published: Oct 26, 2018
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2018-18653?

How severe is CVE-2018-18653?

Severity scoring for CVE-2018-18653 is pending analysis. The EPSS model estimates a 0.31% probability of exploitation in the next 30 days.

How do I fix CVE-2018-18653?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2018-18653?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST