---
title: "CVE-2016-2776\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-2016-2776?format=md
keywords: index, follow
---

# CVE-2016-2776

Publication date 27 September 2016

Last updated 25 August 2025

---

Ubuntu priority

**Medium**

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

## Cvss 3 Severity Score

**7.5 · High**

[Score breakdown](https://ubuntu.com/security/CVE-2016-2776?format=md#impact-score)

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## Description

buffer.c in named in ISC BIND 9 before 9.9.9-P3, 9.10.x before 9.10.4-P3,
and 9.11.x before 9.11.0rc3 does not properly construct responses, which
allows remote attackers to cause a denial of service (assertion failure and
daemon exit) via a crafted query.

## Status

Show unmaintained releases

| Package | Ubuntu Release | Status |
| --- | --- | --- |
| bind9 | 17.04 zesty | Fixed 1:9.10.3.dfsg.P4-10.1ubuntu1 |
| 16.10 yakkety | Fixed 1:9.10.3.dfsg.P4-10.1ubuntu1 |
| 16.04 LTS xenial | Fixed 1:9.10.3.dfsg.P4-8ubuntu1.1 |
| 14.04 LTS trusty | Fixed 1:9.9.5.dfsg-3ubuntu0.9 |
| 12.04 LTS precise | Fixed 1:9.8.1.dfsg.P1-4ubuntu0.17 |

---

* [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**

7.5 · High

* Base metrics

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

  | Parameter | Value |
  | --- | --- |
  | Base score | 7.5 · High |
  | Exploitability score | - |
  | Impact score | - |

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

## References

* [MITRE](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-2776)
* [NVD](https://nvd.nist.gov/vuln/detail/CVE-2016-2776)
* [Launchpad](https://launchpad.net/bugs/cve/CVE-2016-2776)
* [Debian](https://security-tracker.debian.org/tracker/CVE-2016-2776)

### Related Ubuntu Security Notices (USN)

+ [USN-3088-1](https://usn.ubuntu.com/USN-3088-1)
+ Bind vulnerability
+ 27 September 2016

### Other references

* <https://kb.isc.org/article/AA-01419>
* <https://www.cve.org/CVERecord?id=CVE-2016-2776>