CVE-2017-12154 Privilege escalation in Linux kernel through 4.13.3

What is CVE-2017-12154?

CVE-2017-12154 is a high-severity vulnerability in Linux kernel, published on 26 Sep 2017. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

The prepare_vmcs02 function in arch/x86/kvm/vmx.c in the Linux kernel through 4.13.3 does not ensure that the "CR8-load exiting" and "CR8-store exiting" L0 vmcs02 controls exist in cases where L1 omits the "use TPR shadow" vmcs12 control, which allows KVM L2 guest OS users to obtain read and write access to the hardware CR8 register.

Which versions are affected by CVE-2017-12154?

It affects 1 product.

Products include Linux kernel.

How do I fix CVE-2017-12154?

Apply the vendor's patch.

Is CVE-2017-12154 being exploited?

There is no known exploitation of CVE-2017-12154 in the wild and no public exploit code.

Other vulnerabilities in Linux kernel

• CVE-2026-53266 Linux Kernel Out-of-Bounds Write Exploited High 8.8
• CVE-2013-6282 Linux Kernel Improper Input Validation Exploited High 8.8
• CVE-2022-0185 Linux Kernel Heap-Based Buffer Overflow Exploited High 8.4
• CVE-2013-2094 Linux Kernel Privilege Escalation Exploited High 8.4
• CVE-2026-53362 Linux Kernel Unspecified Exploited High 7.8

All Linux kernel vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as DEBIAN-CVE-2017-12154, GHSA-wjrh-v4vw-2jmc, UBUNTU-CVE-2017-12154.