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[email protected]CVE-2019-14821

HistorySep 19, 2019 - 6:15 p.m.

CVE-2019-14821

2019-09-1918:15:10

CWE-787

[email protected]

web.nvd.nist.gov

515

linux kernel

kvm

hypervisor

cve-2019-14821

out-of-bounds access

denial of service

privilege escalation

nvd

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

Confidence

High

EPSS

0.001

Percentile

34.9%

JSON

An out-of-bounds access issue was found in the Linux kernel, all versions through 5.3, in the way Linux kernel’s KVM hypervisor implements the Coalesced MMIO write operation. It operates on an MMIO ring buffer ‘struct kvm_coalesced_mmio’ object, wherein write indices ‘ring->first’ and ‘ring->last’ value could be supplied by a host user-space process. An unprivileged host user or process with access to ‘/dev/kvm’ device could use this flaw to crash the host kernel, resulting in a denial of service or potentially escalating privileges on the system.

Affected configurations

Vulners

NVD

Node

linuxlinux_kernelRange≤5.3

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

[
  {
    "product": "Kernel",
    "vendor": "Linux",
    "versions": [
      {
        "status": "affected",
        "version": "all through 5.3"
      }
    ]
  }
]