---
title: "CVE-2017-12136\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-2017-12136?format=md
keywords: index, follow
---

# CVE-2017-12136

Publication date 24 August 2017

Last updated 25 August 2025

---

Ubuntu priority

**Medium**

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

## Cvss 3 Severity Score

**7.8 · High**

[Score breakdown](https://ubuntu.com/security/CVE-2017-12136?format=md#impact-score)

Toggle side navigation

## Description

Race condition in the grant table code in Xen 4.6.x through 4.9.x allows
local guest OS administrators to cause a denial of service (free list
corruption and host crash) or gain privileges on the host via vectors
involving maptrack free list handling.

[Read the notes from the security team](https://ubuntu.com/security/CVE-2017-12136?format=md#notes)

## Status

Show unmaintained releases

| Package | Ubuntu Release | Status |
| --- | --- | --- |
| xen | 17.04 zesty | Fixed 4.8.0-1ubuntu2.4 |
| 16.04 LTS xenial | Fixed 4.6.5-0ubuntu1.4 |
| 14.04 LTS trusty | 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)

## Notes

---

### [sbeattie](https://launchpad.net/~sbeattie)

xen 4.6 and later are vulnerable

## Severity score breakdown

CVSS version:
CVSS v3.0

**Base score**

7.8 · High

* Base metrics

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

  | Parameter | Value |
  | --- | --- |
  | Base score | 7.8 · High |
  | Exploitability score | - |
  | Impact score | - |

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

## References

* [MITRE](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-12136)
* [NVD](https://nvd.nist.gov/vuln/detail/CVE-2017-12136)
* [Launchpad](https://launchpad.net/bugs/cve/CVE-2017-12136)
* [Debian](https://security-tracker.debian.org/tracker/CVE-2017-12136)

### Other references

* <https://xenbits.xen.org/xsa/advisory-228.html>
* <https://www.cve.org/CVERecord?id=CVE-2017-12136>