---
title: "CVE-2016-4609\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-2016-4609?format=md
keywords: index, follow
---

# CVE-2016-4609

Publication date 22 July 2016

Last updated 25 August 2025

---

Ubuntu priority

**Medium**

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

## Cvss 3 Severity Score

**9.8 · Critical**

[Score breakdown](https://ubuntu.com/security/CVE-2016-4609?format=md#impact-score)

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## Description

libxslt in Apple iOS before 9.3.3, OS X before 10.11.6, iTunes before
12.4.2 on Windows, iCloud before 5.2.1 on Windows, tvOS before 9.2.2, and
watchOS before 2.2.2 allows remote attackers to cause a denial of service
(memory corruption) or possibly have unspecified other impact via unknown
vectors, a different vulnerability than CVE-2016-4607, CVE-2016-4608,
CVE-2016-4610, and CVE-2016-4612.

[Read the notes from the security team](https://ubuntu.com/security/CVE-2016-4609?format=md#notes)

## Status

Show unmaintained releases

| Package | Ubuntu Release | Status |
| --- | --- | --- |
| libxslt | 17.04 zesty | Not affected |
| 16.10 yakkety | Not affected |
| 16.04 LTS xenial | Fixed 1.1.28-2.1ubuntu0.1 |
| 15.10 wily | Ignored end of life |
| 14.04 LTS trusty | Fixed 1.1.28-2ubuntu0.1 |
| 12.04 LTS precise | Fixed 1.1.26-8ubuntu1.4 |

---

* [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)

per Nick Wellnhofer, possibly one of these commits:
https://git.gnome.org/browse/libxslt/commit/?id=ef7429bb4f1433726cc8fc4fe3d134d8a439fab1
https://git.gnome.org/browse/libxslt/commit/?id=93bb314768aafaffad1df15bbee10b7c5423e283
https://git.gnome.org/browse/libxslt/commit/?id=8b90c9a699e0eaa98bbeec63a473ddc73aaa238c
https://git.gnome.org/browse/libxslt/commit/?id=87c3d9ea214fc0503fd8130b6dd97431d69cc066

---

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

given the above, these were fixed in the upstream 1.1.29
release
incorporated patches into USN 3271-1

## Severity score breakdown

CVSS version:
CVSS v3.0

**Base score**

9.8 · Critical

* Base metrics

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

  | Parameter | Value |
  | --- | --- |
  | Base score | 9.8 · Critical |
  | Exploitability score | - |
  | Impact score | - |

**Vector:** CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

## References

* [MITRE](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-4609)
* [NVD](https://nvd.nist.gov/vuln/detail/CVE-2016-4609)
* [Launchpad](https://launchpad.net/bugs/cve/CVE-2016-4609)
* [Debian](https://security-tracker.debian.org/tracker/CVE-2016-4609)

### Other references

* <http://lists.apple.com/archives/security-announce/2016/Jul/msg00000.html>
* <http://lists.apple.com/archives/security-announce/2016/Jul/msg00001.html>
* <http://lists.apple.com/archives/security-announce/2016/Jul/msg00002.html>
* <http://lists.apple.com/archives/security-announce/2016/Jul/msg00003.html>
* <http://lists.apple.com/archives/security-announce/2016/Jul/msg00005.html>
* <https://support.apple.com/HT206899>
* <https://support.apple.com/HT206901>
* <https://support.apple.com/HT206902>
* <https://support.apple.com/HT206903>
* <https://support.apple.com/HT206904>
* <https://support.apple.com/HT206905>
* <https://www.cve.org/CVERecord?id=CVE-2016-4609>