CVE-2017-12154

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.

7.1
CVSS
Severity: High
CVSS 3.0 •
CVSS 2.0 •
EPSS 0.02%
Vendor Advisory redhat.com Vendor Advisory debian.org Vendor Advisory redhat.com Vendor Advisory ubuntu.com Vendor Advisory ubuntu.com Vendor Advisory redhat.com
Affected: n/a Linux kernel through 4.13.3
Published at:
Updated at:

References

Link Tags
http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=51aa68e7d57e3217192d88ce90fd5b8ef29ec94f issue tracking third party advisory patch
https://bugzilla.redhat.com/show_bug.cgi?id=1491224 issue tracking third party advisory patch
https://access.redhat.com/errata/RHSA-2018:1062 vendor advisory
http://www.securityfocus.com/bid/100856 vdb entry third party advisory
http://www.debian.org/security/2017/dsa-3981 vendor advisory
https://www.spinics.net/lists/kvm/msg155414.html mailing list third party advisory patch
https://access.redhat.com/errata/RHSA-2018:0676 vendor advisory
https://usn.ubuntu.com/3698-1/ vendor advisory
https://github.com/torvalds/linux/commit/51aa68e7d57e3217192d88ce90fd5b8ef29ec94f issue tracking third party advisory patch
https://usn.ubuntu.com/3698-2/ vendor advisory
https://access.redhat.com/errata/RHSA-2019:1946 vendor advisory

Frequently Asked Questions

What is the severity of CVE-2017-12154?
CVE-2017-12154 has been scored as a high severity vulnerability.
How to fix CVE-2017-12154?
To fix CVE-2017-12154, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2017-12154 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2017-12154 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2017-12154?
CVE-2017-12154 affects n/a Linux kernel through 4.13.3.
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