---
title: "CVE-2015-7971\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-2015-7971?format=md
keywords: index, follow
---

# CVE-2015-7971

Publication date 30 October 2015

Last updated 24 July 2024

---

Ubuntu priority

**Low**

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

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## Description

Xen 3.2.x through 4.6.x does not limit the number of printk console
messages when logging certain pmu and profiling hypercalls, which allows
local guests to cause a denial of service via a sequence of crafted (1)
HYPERCALL\_xenoprof\_op hypercalls, which are not properly handled in the
do\_xenoprof\_op function in common/xenoprof.c, or (2) HYPERVISOR\_xenpmu\_op
hypercalls, which are not properly handled in the do\_xenpmu\_op function in
arch/x86/cpu/vpmu.c.

## Status

Show unmaintained releases

| Package | Ubuntu Release | Status |
| --- | --- | --- |
| xen | 15.10 wily | Fixed 4.5.1-0ubuntu1.1 |
| 15.04 vivid | Fixed 4.5.0-1ubuntu4.3 |
| 14.04 LTS trusty | Fixed 4.4.2-0ubuntu0.14.04.3 |
| 12.04 LTS precise | Fixed 4.1.6.1-0ubuntu0.12.04.7 |

---

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

## References

* [MITRE](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2015-7971)
* [NVD](https://nvd.nist.gov/vuln/detail/CVE-2015-7971)
* [Launchpad](https://launchpad.net/bugs/cve/CVE-2015-7971)
* [Debian](https://security-tracker.debian.org/tracker/CVE-2015-7971)

### Other references

* <http://xenbits.xen.org/xsa/advisory-152.html>
* <https://www.cve.org/CVERecord?id=CVE-2015-7971>