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[email protected]CVE-2018-16882

HistoryJan 03, 2019 - 4:29 p.m.

CVE-2018-16882

2019-01-0316:29:00

CWE-416

[email protected]

web.nvd.nist.gov

222

linux

kernel

kvm

hypervisor

use-after-free

nested

virtualization

cve-2018-16882

nvd

security

dos

privilege escalation

CVSS2

7.2

Attack Vector

LOCAL

Attack Complexity

LOW

Authentication

NONE

Confidentiality Impact

COMPLETE

Integrity Impact

COMPLETE

Availability Impact

COMPLETE

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

CVSS3

8.8

Attack Vector

LOCAL

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

NONE

Scope

CHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

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

AI Score

8.1

Confidence

High

EPSS

0.001

Percentile

28.1%

JSON

A use-after-free issue was found in the way the Linux kernel’s KVM hypervisor processed posted interrupts when nested(=1) virtualization is enabled. In nested_get_vmcs12_pages(), in case of an error while processing posted interrupt address, it unmaps the ‘pi_desc_page’ without resetting ‘pi_desc’ descriptor address, which is later used in pi_test_and_clear_on(). A guest user/process could use this flaw to crash the host kernel resulting in DoS or potentially gain privileged access to a system. Kernel versions before 4.14.91 and before 4.19.13 are vulnerable.

Affected configurations

Vulners

NVD

Node

linuxlinux_kernelRange≤4.14.91

linuxlinux_kernelRange≤4.19.13

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

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

CNA Affected

[
  {
    "product": "kernel:",
    "vendor": "The Linux Foundation",
    "versions": [
      {
        "status": "affected",
        "version": "before 4.14.91"
      },
      {
        "status": "affected",
        "version": "before 4.19.13"
      }
    ]
  }
]