---
title: "CVE-2013-1920\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-2013-1920?format=md
keywords: index, follow
---

# CVE-2013-1920

Publication date 12 April 2013

Last updated 24 July 2024

---

Ubuntu priority

**Medium**

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

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## Description

Xen 4.2.x, 4.1.x, and earlier, when the hypervisor is running "under memory
pressure" and the Xen Security Module (XSM) is enabled, uses the wrong
ordering of operations when extending the per-domain event channel tracking
table, which causes a use-after-free and allows local guest kernels to
inject arbitrary events and gain privileges via unspecified vectors.

[Read the notes from the security team](https://ubuntu.com/security/CVE-2013-1920?format=md#notes)

## Status

Show unmaintained releases

| Package | Ubuntu Release | Status |
| --- | --- | --- |
| xen | 12.10 quantal | Not affected |
| 12.04 LTS precise | Not affected |
| 11.10 oneiric | Not affected |
| 10.04 LTS lucid | Not in release |
| 8.04 LTS hardy | Not in release |
| xen-3.1 | 12.10 quantal | Not in release |
| 12.04 LTS precise | Not in release |
| 11.10 oneiric | Not in release |
| 10.04 LTS lucid | Not in release |
| 8.04 LTS hardy | Ignored end of life |
| xen-3.2 | 12.10 quantal | Not in release |
| 12.04 LTS precise | Not in release |
| 11.10 oneiric | Not in release |
| 10.04 LTS lucid | Not in release |
| 8.04 LTS hardy | Ignored end of life |
| xen-3.3 | 12.10 quantal | Not in release |
| 12.04 LTS precise | Not in release |
| 11.10 oneiric | Not in release |
| 10.04 LTS lucid | Not affected |
| 8.04 LTS hardy | 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

---

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

hypervisor packages are in universe. For
issues in the hypervisor, add appropriate
tags to each section, ex:
Tags\_xen: universe-binary

## References

* [MITRE](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2013-1920)
* [NVD](https://nvd.nist.gov/vuln/detail/CVE-2013-1920)
* [Launchpad](https://launchpad.net/bugs/cve/CVE-2013-1920)
* [Debian](https://security-tracker.debian.org/tracker/CVE-2013-1920)

### Other references

* <http://xforce.iss.net/xforce/xfdb/83226>
* <http://www.securitytracker.com/id/1028388>
* <http://www.openwall.com/lists/oss-security/2013/04/04/7>
* <http://secunia.com/advisories/52857>
* <http://osvdb.org/92050>
* <http://lists.xen.org/archives/html/xen-announce/2013-04/msg00000.html>
* <https://www.cve.org/CVERecord?id=CVE-2013-1920>