---
title: CVE-2017-7995
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-2017-7995
---

# CVE-2017-7995

Publication date 3 May 2017

Last updated 25 August 2025

---

Ubuntu priority

**Medium**

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

## Cvss 3 Severity Score

**3.8 · Low**

[Score breakdown](https://ubuntu.com/security/CVE-2017-7995#impact-score)

Toggle side navigation

## Description

Xen PV guest before Xen 4.3 checked access permissions to MMIO ranges only
after accessing them, allowing host PCI device space memory reads, leading
to information disclosure. This is an error in the get\_user function. NOTE:
the upstream Xen Project considers versions before 4.5.x to be EOL.

[Read the notes from the security team](https://ubuntu.com/security/CVE-2017-7995#notes)

## Status

Show unmaintained releases

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

---

* [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)

Older than 4.3 only

## Severity score breakdown

CVSS version:
CVSS v3.0

**Base score**

3.8 · Low

* Base metrics

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

  | Parameter | Value |
  | --- | --- |
  | Base score | 3.8 · Low |
  | Exploitability score | - |
  | Impact score | - |

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

## References

* [MITRE](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-7995)
* [NVD](https://nvd.nist.gov/vuln/detail/CVE-2017-7995)
* [Launchpad](https://launchpad.net/bugs/cve/CVE-2017-7995)
* [Debian](https://security-tracker.debian.org/tracker/CVE-2017-7995)

### Other references

* <https://bugzilla.suse.com/show_bug.cgi?id=1033948>
* <http://lists.opensuse.org/opensuse-security-announce/2017-05/msg00005.html>
* <https://www.cve.org/CVERecord?id=CVE-2017-7995>