Vulnerability in Linux Kernel
CVE-2017-12154
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.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.1 (High). Vector: CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N.
EPSS exploit prediction
EPSS: 0.005 (42.9th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 43rd percentile — 42.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.005 · newest: 0.005 · change: 0.000
Affected products
- Linux Kernel
- Linux Kernel Through 4.13.3 — versions Linux kernel through 4.13.3
References
- git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/ (Patch, Third Party Advisory, Issue Tracking)
- bugzilla.redhat.com/show_bug.cgi (Patch, Third Party Advisory, Issue Tracking)
- access.redhat.com/errata/RHSA-2018:1062 (vendor-advisory)
- www.securityfocus.com/bid/100856 (VDB Entry, Third Party Advisory, vdb-entry)
- www.debian.org/security/2017/dsa-3981 (vendor-advisory)
- www.spinics.net/lists/kvm/msg155414.html (Patch, Mailing List, Third Party Advisory)
- access.redhat.com/errata/RHSA-2018:0676 (vendor-advisory)
- usn.ubuntu.com/3698-1/ (vendor-advisory)
- github.com/torvalds/linux/commit/51aa68e7d57e3217192d88ce90fd5b8ef29ec94f (Patch, Third Party Advisory, Issue Tracking)
- usn.ubuntu.com/3698-2/ (vendor-advisory)
Frequently asked questions
- What is CVE-2017-12154?
- CVE-2017-12154 is a high-severity vulnerability in Linux Kernel. CVSS score: 7.1/10. Published 2017-09-26.
- How severe is CVE-2017-12154?
- High severity. CVSS v3 base score is 7.1 out of 10.