What is CVE-2018-18653?

CVE-2018-18653 is a high-severity vulnerability in Canonical Ubuntu Linux, classified under Improper Verification of Cryptographic Signature. CVSS score: 7.8/10. Published 2018-10-26.

How severe is CVE-2018-18653?

High severity. CVSS v3 base score is 7.8 out of 10.

Vulnerability in Canonical Ubuntu Linux

CVE-2018-18653

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: 0.003 (23.5th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.8 (High). Vector: CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

Affected products

Canonical Ubuntu_linux — versions 18.10
N/a — versions n/a

Weakness classification (CWE)

CWE-347 — Improper Verification of Cryptographic Signature

References

cve@mitre.org (Exploit, x_refsource_MISC, Issue Tracking, Vendor Advisory)
cve@mitre.org (x_refsource_UBUNTU, vendor-advisory, Patch, Vendor Advisory)
cve@mitre.org (x_refsource_UBUNTU, vendor-advisory, Patch, Vendor Advisory)

Frequently asked questions

What is CVE-2018-18653?: CVE-2018-18653 is a high-severity vulnerability in Canonical Ubuntu Linux, classified under Improper Verification of Cryptographic Signature. CVSS score: 7.8/10. Published 2018-10-26.
How severe is CVE-2018-18653?: High severity. CVSS v3 base score is 7.8 out of 10.