Vulnerability 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.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux Kernel | <= 4.13.3 |
References
- http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=51aa68Issue TrackingPatchThird Party Advisory
- http://www.debian.org/security/2017/dsa-3981
- http://www.securityfocus.com/bid/100856Third Party AdvisoryVDB Entry
- https://access.redhat.com/errata/RHSA-2018:0676
- https://access.redhat.com/errata/RHSA-2018:1062
- https://access.redhat.com/errata/RHSA-2019:1946
- https://bugzilla.redhat.com/show_bug.cgi?id=1491224Issue TrackingPatchThird Party Advisory
- https://github.com/torvalds/linux/commit/51aa68e7d57e3217192d88ce90fd5b8ef29ec94Issue TrackingPatchThird Party Advisory
- https://usn.ubuntu.com/3698-1/
- https://usn.ubuntu.com/3698-2/
- https://www.spinics.net/lists/kvm/msg155414.htmlMailing ListPatchThird Party Advisory
- http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=51aa68Issue TrackingPatchThird Party Advisory
- http://www.debian.org/security/2017/dsa-3981
- http://www.securityfocus.com/bid/100856Third Party AdvisoryVDB Entry
- https://access.redhat.com/errata/RHSA-2018:0676
FAQ
What is CVE-2017-12154?
CVE-2017-12154 is a vulnerability with a CVSS score of 7.1 (HIGH). 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 omit...
How severe is CVE-2017-12154?
CVE-2017-12154 has been rated HIGH with a CVSS base score of 7.1/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2017-12154?
Check the references section above for vendor advisories and patch information. Affected products include: Linux Linux Kernel.