---
id: CVE-2017-18191
aliases:
  - GHSA-ffmh-r67w-m88f
  - PYSEC-2026-689
title: OpenStack Nova Denial of service attack on the compute host
summary: OpenStack Nova Denial of service attack on the compute host
severity: high
cvss: 7.5
cvssVector: 'CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H'
vendor: nova
product: nova
ecosystem: pip
affected:
  - 'nova >= 15.0.0, < 15.1.1'
  - 'nova >= 16.0.0, < 16.1.2'
patched:
  - nova 15.1.1
  - nova 16.1.2
published: '2022-05-13'
updated: '2026-07-06'
source: OSV
sourceUrl: 'https://osv.dev/vulnerability/GHSA-ffmh-r67w-m88f'
references:
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2017-18191'
  - url: >-
      https://github.com/openstack/nova/commit/0225a61fc4557c1257383a654f0741f7ef2ddeac
  - url: >-
      https://github.com/openstack/nova/commit/5b64a1936122eeb35f37a09f9d38159e1a224c58
  - url: >-
      https://github.com/openstack/nova/commit/cd3eb60c2c00bcccfa9ccd4bf9d1a96ae7a5cd88
  - url: 'https://access.redhat.com/errata/RHSA-2018:2332'
  - url: 'https://access.redhat.com/errata/RHSA-2018:2714'
  - url: 'https://access.redhat.com/errata/RHSA-2018:2855'
  - url: 'https://github.com/openstack/nova'
  - url: 'https://launchpad.net/bugs/1739593'
  - url: 'https://review.openstack.org/539893'
  - url: 'https://security.openstack.org/ossa/OSSA-2018-001.html'
  - url: 'http://openwall.com/lists/oss-security/2018/04/20/3'
  - url: 'http://www.securityfocus.com/bid/103104'
tags:
  - osv
  - pip
epss: 0.03476
epssPercentile: 0.88571
ingestedAt: '2026-07-08T18:25:48.884Z'
---

## Overview

An issue was discovered in OpenStack Nova 15.x through 15.1.0 and 16.x through 16.1.1. By detaching and reattaching an encrypted volume, an attacker may access the underlying raw volume and corrupt the LUKS header, resulting in a denial of service attack on the compute host. (The same code error also results in data loss, but that is not a vulnerability because the user loses their own data.) All Nova setups supporting encrypted volumes are affected.

## Affected packages

- `nova >= 15.0.0, < 15.1.1`
- `nova >= 16.0.0, < 16.1.2`

## Remediation

Upgrade to a patched release:

- `nova 15.1.1`
- `nova 16.1.2`