CVE-2017-2596

Description

The nested_vmx_check_vmptr function in arch/x86/kvm/vmx.c in the Linux kernel through 4.9.8 improperly emulates the VMXON instruction, which allows KVM L1 guest OS users to cause a denial of service (host OS memory consumption) by leveraging the mishandling of page references.

CVSS Metrics

• v3.0•MEDIUM•Score: 6.5CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H
• v2.0•MEDIUM•Score: 4.9AV:L/AC:L/Au:N/C:N/I:N/A:C

EPSS Trends

Current EPSS score: 0.05%• Percentile: 16%

Techniques & Countermeasures

• CWE-772•Missing Release of Resource after Effective Lifetime

  The product does not release a resource after its effective lifetime has ended, i.e., after the resource is no longer needed.

Affected Systems

• linux•linux_kernel

  ≤ 4.9.8

References (6)

• https://bugzilla.redhat.com/show_bug.cgi?id=1417812
• http://www.openwall.com/lists/oss-security/2017/01/31/4
• http://www.securityfocus.com/bid/95878
• https://access.redhat.com/errata/RHSA-2017:2077
• https://access.redhat.com/errata/RHSA-2017:1842
• http://www.debian.org/security/2017/dsa-3791