VulnerabilityModified

CVE-2017-12188

HIGH 7.8EPSS 0.44%

Does this matter?

High impact if exploited, but EPSS currently rates exploitation as unlikely (0.44%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.

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."

CVSS 3.1: 7.8 HIGHCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H
EPSS: 0.44% probability · 37th percentile
CISA KEV: Not listed
Weakness: CWE-121, CWE-22
Affected: linux/linux kernel
Source: secalert@redhat.com

References

http://www.securityfocus.com/bid/101267Third Party Advisory, VDB Entry
https://access.redhat.com/errata/RHSA-2018:0395Third Party Advisory
https://access.redhat.com/errata/RHSA-2018:0412Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=1500380Issue Tracking, Patch, Third Party Advisory
https://patchwork.kernel.org/patch/9996579/Issue Tracking, Patch, Vendor Advisory
https://patchwork.kernel.org/patch/9996587/Issue Tracking, Patch, Vendor Advisory
http://www.securityfocus.com/bid/101267Third Party Advisory, VDB Entry
https://access.redhat.com/errata/RHSA-2018:0395Third Party Advisory
https://access.redhat.com/errata/RHSA-2018:0412Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=1500380Issue Tracking, Patch, Third Party Advisory
https://patchwork.kernel.org/patch/9996579/Issue Tracking, Patch, Vendor Advisory
https://patchwork.kernel.org/patch/9996587/Issue Tracking, Patch, Vendor Advisory

Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.