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CVE-2017-12188

7.8 · HIGH

arch/x86/kvm/mmu.c in the Linux kernel through 4.13.5, when nested virtualisation is used, does not properly traverse guest pagetable entries to resolve a guest virtual address, which allows L1 gue…

Published Oct 11, 2017CWE-121EPSS 0.44%

Overview

CVE-2017-12188 is a high-severity vulnerability. It was published on October 11, 2017 and has a CVSS 3.1 base score of 7.8 (HIGH).

This vulnerability has a CVSS 3.1 base score of 7.8, rated HIGH. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

Technical description

arch/x86/kvm/mmu.c in the Linux kernel through 4.13.5, when nested virtualisation is used, does not properly traverse guest pagetable entries to resolve a guest virtual address, which allows L1 guest OS users to execute arbitrary code on the host OS or cause a denial of service (incorrect index during page walking, and host OS crash), aka an "MMU potential stack buffer overrun."

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

Refwww.securityfocus.com/bid/101267Refaccess.redhat.com/errata/RHSA-2018:0395Refaccess.redhat.com/errata/RHSA-2018:0412Refbugzilla.redhat.com/show_bug.cgi?id=1500380Refpatchwork.kernel.org/patch/9996579/Refpatchwork.kernel.org/patch/9996587/Refwww.securityfocus.com/bid/101267Refaccess.redhat.com/errata/RHSA-2018:0395Refaccess.redhat.com/errata/RHSA-2018:0412Refbugzilla.redhat.com/show_bug.cgi?id=1500380

How CyberStrike helps

Frequently asked questions

What is CVE-2017-12188?

CVE-2017-12188 is a high-severity vulnerability. It was published on October 11, 2017 and has a CVSS 3.1 base score of 7.8 (HIGH).

How severe is CVE-2017-12188?

This vulnerability has a CVSS 3.1 base score of 7.8, rated HIGH. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

How do I fix or remediate CVE-2017-12188?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2017-12188?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2017-12188 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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