---
title: "CVE-2017-1000460\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-2017-1000460?format=md
keywords: index, follow
---

# CVE-2017-1000460

Publication date 3 January 2018

Last updated 25 August 2025

---

Ubuntu priority

**Medium**

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

## Cvss 3 Severity Score

**6.5 · Medium**

[Score breakdown](https://ubuntu.com/security/CVE-2017-1000460?format=md#impact-score)

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## Description

In line libavcodec/h264dec.c:500 in libav(v13\_dev0), ffmpeg(n3.4),
chromium(56 prior Feb 13, 2017), the return value of init\_get\_bits is
ignored and get\_ue\_golomb(&gb) is called on an uninitialized get\_bits
context, which causes a NULL deref exception.

## Status

Show unmaintained releases

| Package | Ubuntu Release | Status |
| --- | --- | --- |
| ffmpeg | 18.10 cosmic | Not affected |
| 18.04 LTS bionic | Not affected |
| 17.10 artful | Ignored end of life |
| 17.04 zesty | Ignored end of life |
| 16.04 LTS xenial | Not affected |
| 14.04 LTS trusty | Not in release |
| libav | 18.10 cosmic | Not in release |
| 18.04 LTS bionic | Not in release |
| 17.10 artful | Not in release |
| 17.04 zesty | Not in release |
| 16.04 LTS xenial | Not in release |
| 14.04 LTS trusty | Not affected |

---

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

## Severity score breakdown

CVSS version:
CVSS v3.0

**Base score**

6.5 · Medium

* Base metrics

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

  | Parameter | Value |
  | --- | --- |
  | Base score | 6.5 · Medium |
  | Exploitability score | - |
  | Impact score | - |

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

## References

* [MITRE](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-1000460)
* [NVD](https://nvd.nist.gov/vuln/detail/CVE-2017-1000460)
* [Launchpad](https://launchpad.net/bugs/cve/CVE-2017-1000460)
* [Debian](https://security-tracker.debian.org/tracker/CVE-2017-1000460)

### Other references

* <https://bugzilla.libav.org/show_bug.cgi?id=952>
* <https://chromium.googlesource.com/chromium/third_party/ffmpeg/+/8e313ca08800178efce00045e07dc494d437b70c>
* <https://lists.ffmpeg.org/pipermail/ffmpeg-cvslog/2017-January/104221.html>
* <https://www.cve.org/CVERecord?id=CVE-2017-1000460>