---
id: CVE-2018-7167
title: >-
  Calling Buffer.fill() or Buffer.alloc() with some parameters can lead to a
  hang which could result in a Denial of Service
summary: >-
  Calling Buffer.fill() or Buffer.alloc() with some parameters can lead to a
  hang which could result in a Denial of Service. In order to address this
  vulnerability, the implementations of Buffer.alloc() and Buffer.fill() were
  updated so th…
severity: high
cvss: 7.5
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H'
cwe:
  - CWE-119
  - CWE-835
vendor: nodejs
product: node.js
affected:
  - 'node.js > 6.9.0, < 6.14.3'
  - 'node.js >= 8.9.0, < 8.11.3'
  - 'node.js >= 9.0.0, < 9.11.2'
patched:
  - node.js 9.11.2
published: '2018-06-13'
updated: '2026-10-08'
sourceUpdated: '2026-10-08T22:16:48.373'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2018-7167'
references:
  - url: 'http://www.securityfocus.com/bid/106363'
    label: cve-request@iojs.org
  - url: 'https://nodejs.org/en/blog/vulnerability/june-2018-security-releases/'
    label: cve-request@iojs.org
  - url: 'https://security.gentoo.org/glsa/202003-48'
    label: cve-request@iojs.org
  - url: 'http://www.securityfocus.com/bid/106363'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://nodejs.org/en/blog/vulnerability/june-2018-security-releases/'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://security.gentoo.org/glsa/202003-48'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: >-
      https://security.access.redhat.com/data/csaf/v2/vex/2018/cve-2018-7167.json
  - url: 'https://access.redhat.com/security/cve/CVE-2018-7167'
  - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=1591006'
  - url: 'https://www.cve.org/CVERecord?id=CVE-2018-7167'
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2018-7167'
  - url: 'https://access.redhat.com/errata/RHSA-2018:2949'
tags:
  - nvd
  - csaf
  - vex
  - red-hat
  - cve.org
epss: 0.06689
epssPercentile: 0.93868
ingestedAt: '2026-10-08T23:16:47.291Z'
ssvc:
  exploitation: none
  automatable: 'yes'
  technicalImpact: partial
  timestamp: '2026-10-08T21:11:56.500944Z'
---

## Overview

Calling Buffer.fill() or Buffer.alloc() with some parameters can lead to a hang which could result in a Denial of Service. In order to address this vulnerability, the implementations of Buffer.alloc() and Buffer.fill() were updated so that they zero fill instead of hanging in these cases. All versions of Node.js 6.x (LTS "Boron"), 8.x (LTS "Carbon"), and 9.x are vulnerable. All versions of Node.js 10.x (Current) are NOT vulnerable.

## Affected

- `node.js > 6.9.0, < 6.14.3`
- `node.js >= 8.9.0, < 8.11.3`
- `node.js >= 9.0.0, < 9.11.2`

## Remediation

Upgrade past the affected range:

- `node.js 9.11.2`

## Vendor advisories

- **RHSA-2018:2949** · Red Hat · fixed in: Red Hat Software Collections for Red Hat Enterprise Linux Server (v. 7), Red Hat Software Collections for Red Hat Enterprise Linux Server EUS (v. 7.4), Red Hat Software Collections for Red Hat Enterprise Linux Server EUS (v. 7.5), Red Hat Software Collections for Red Hat Enterprise Linux Workstation (v. 7) · released 2018-10-18 · [advisory](https://access.redhat.com/errata/RHSA-2018:2949)
- **Red Hat VEX** · Moderate · affected: Red Hat Mobile Application Platform 4, Red Hat OpenShift Enterprise 3, Red Hat Software Collections · no fix planned: Red Hat Mobile Application Platform 4, Red Hat OpenShift Enterprise 3, Red Hat Software Collections · updated 2026-10-09 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2018/cve-2018-7167.json)