---
title: "CVE-2017-5226\n    | Ubuntu"
description: Ubuntu is an open source software operating system that runs from the
  desktop, to the cloud, to all your internet connected things.
url: https://ubuntu.com/security/CVE-2017-5226?format=md
keywords: index, follow
---

# CVE-2017-5226

Publication date 29 March 2017

Last updated 25 August 2025

---

Ubuntu priority

**Medium**

[Why this priority?](https://ubuntu.com/security/cves/about#priority )

## Cvss 3 Severity Score

**10.0 · Critical**

[Score breakdown](https://ubuntu.com/security/CVE-2017-5226?format=md#impact-score)

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## Description

When executing a program via the bubblewrap sandbox, the nonpriv session
can escape to the parent session by using the TIOCSTI ioctl to push
characters into the terminal's input buffer, allowing an attacker to escape
the sandbox.

## Status

Show unmaintained releases

| Package | Ubuntu Release | Status |
| --- | --- | --- |
| bubblewrap | 18.04 LTS bionic | Not affected |
| 17.10 artful | Ignored end of life |
| 17.04 zesty | Ignored end of life |
| 16.10 yakkety | Ignored end of life |
| 16.04 LTS xenial | Not in release |
| 14.04 LTS trusty | Not in release |
| 12.04 LTS precise | Not in release |

---

* [How can I get the fixes?](https://ubuntu.com/security/cves/about#security)
* [What do statuses mean?](https://ubuntu.com/security/cves/about#statuses)

## Severity score breakdown

CVSS version:
CVSS v3.0

**Base score**

10.0 · Critical

* Base metrics

  | Parameter | Value |
  | --- | --- |
  | Attack vector | Network |
  | Attack complexity | Low |
  | Privileges required | None |
  | User interaction | None |
  | Scope | Changed |
  | Confidentiality impact | High |
  | Integrity impact | High |
  | Availability impact | High |
* Scores

  | Parameter | Value |
  | --- | --- |
  | Base score | 10.0 · Critical |
  | Exploitability score | - |
  | Impact score | - |

**Vector:** CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H

## References

* [MITRE](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-5226)
* [NVD](https://nvd.nist.gov/vuln/detail/CVE-2017-5226)
* [Launchpad](https://launchpad.net/bugs/cve/CVE-2017-5226)
* [Debian](https://security-tracker.debian.org/tracker/CVE-2017-5226)

### Other references

* <https://github.com/projectatomic/bubblewrap/issues/142>
* <https://www.cve.org/CVERecord?id=CVE-2017-5226>