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[email protected]CVE-2019-3887

HistoryApr 09, 2019 - 4:29 p.m.

CVE-2019-3887

2019-04-0916:29:01

CWE-863

[email protected]

web.nvd.nist.gov

cve-2019-3887

kvm hypervisor

x2apic

msr

nested virtualization

dos

nvd

4.7 Medium

CVSS2

Attack Vector

LOCAL

Attack Complexity

MEDIUM

Authentication

NONE

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

COMPLETE

AV:L/AC:M/Au:N/C:N/I:N/A:C

5.6 Medium

CVSS3

Attack Vector

LOCAL

Attack Complexity

HIGH

Privileges Required

LOW

User Interaction

NONE

Scope

CHANGED

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

HIGH

CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:N/I:N/A:H

6 Medium

AI Score

Confidence

High

0.001 Low

EPSS

Percentile

20.8%

JSON

A flaw was found in the way KVM hypervisor handled x2APIC Machine Specific Rregister (MSR) access with nested(=1) virtualization enabled. In that, L1 guest could access L0’s APIC register values via L2 guest, when ‘virtualize x2APIC mode’ is enabled. A guest could use this flaw to potentially crash the host kernel resulting in DoS issue. Kernel versions from 4.16 and newer are vulnerable to this issue.

Affected configurations

Vulners

NVD

Node

linuxlinux_kernelRange≤4.16

VendorProductVersionCPE
linuxlinux_kernel*cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*

Vendor	Product	Version	CPE
linux	linux_kernel	*	cpe:2.3:o:linux:linux_kernel::::::::

CNA Affected

[
  {
    "vendor": "The Linux Foundation",
    "product": "Kernel",
    "versions": [
      {
        "version": "from 4.16",
        "status": "affected"
      }
    ]
  }
]