---
title: "CVE-2016-8610\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-2016-8610?format=md
keywords: index, follow
---

# CVE-2016-8610

Publication date 24 October 2016

Last updated 25 August 2025

---

Ubuntu priority

**Low**

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

## Cvss 3 Severity Score

**7.5 · High**

[Score breakdown](https://ubuntu.com/security/CVE-2016-8610?format=md#impact-score)

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## Description

A denial of service flaw was found in OpenSSL 0.9.8, 1.0.1, 1.0.2 through
1.0.2h, and 1.1.0 in the way the TLS/SSL protocol defined processing of
ALERT packets during a connection handshake. A remote attacker could use
this flaw to make a TLS/SSL server consume an excessive amount of CPU and
fail to accept connections from other clients.

## Status

Show unmaintained releases

| Package | Ubuntu Release | Status |
| --- | --- | --- |
| gnutls26 | 19.04 disco | Not in release |
| 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 |
| 16.10 yakkety | Not in release |
| 16.04 LTS xenial | Not in release |
| 14.04 LTS trusty | Fixed 2.12.23-12ubuntu2.7 |
| 12.04 LTS precise | Fixed 2.12.14-5ubuntu3.13 |
| gnutls28 | 19.04 disco | Not affected |
| 18.10 cosmic | Not affected |
| 18.04 LTS bionic | Not affected |
| 17.10 artful | Not affected |
| 17.04 zesty | Not affected |
| 16.10 yakkety | Fixed 3.5.3-5ubuntu1.1 |
| 16.04 LTS xenial | Fixed 3.4.10-4ubuntu1.2 |
| 14.04 LTS trusty | Not in release |
| 12.04 LTS precise | Ignored end of life |
| openssl | 19.04 disco | Fixed 1.0.2g-1ubuntu11 |
| 18.10 cosmic | Fixed 1.0.2g-1ubuntu11 |
| 18.04 LTS bionic | Fixed 1.0.2g-1ubuntu11 |
| 17.10 artful | Fixed 1.0.2g-1ubuntu11 |
| 17.04 zesty | Fixed 1.0.2g-1ubuntu11 |
| 16.10 yakkety | Fixed 1.0.2g-1ubuntu9.1 |
| 16.04 LTS xenial | Fixed 1.0.2g-1ubuntu4.6 |
| 14.04 LTS trusty | Fixed 1.0.1f-1ubuntu2.22 |
| 12.04 LTS precise | Fixed 1.0.1-4ubuntu5.39 |
| openssl098 | 19.04 disco | Not in release |
| 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 |
| 16.10 yakkety | Not in release |
| 16.04 LTS xenial | Not in release |
| 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)
* [Patch details](https://ubuntu.com/security/CVE-2016-8610?format=md#patch-details)

### Patch details

For informational purposes only. We recommend not to cherry-pick updates. [How can I get the fixes?](https://ubuntu.com/security/cves/about#security)

| Package | Patch details |
| --- | --- |
| gnutls28 | * Upstream:   [1ffb827](https://gitlab.com/gnutls/gnutls/commit/1ffb827e45721ef56982d0ffd5c5de52376c428e) * Upstream:   [42a8bb3](https://gitlab.com/gnutls/gnutls/commit/42a8bb3bdad73f13425ae18a41addbbc04496101) * Upstream:   [648bf9b](https://gitlab.com/gnutls/gnutls/commit/648bf9b00e1cbf45c6d05fab07e91fad97e6926d) |
| openssl | * Upstream:   <https://git.openssl.org/?p=openssl.git;a=commit;h=af58be768ebb690f78530f796e92b8ae5c9a4401> * Upstream:   <https://git.openssl.org/?p=openssl.git;a=commit;h=22646a075e75991b4e8f5d67171e45a6aead5b48> * Upstream:   <https://git.openssl.org/?p=openssl.git;a=commit;h=f1185392189641014dca94f3fe7834bccb5f4c16> |

## 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:3.1/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-2016-8610)
* [NVD](https://nvd.nist.gov/vuln/detail/CVE-2016-8610)
* [Launchpad](https://launchpad.net/bugs/cve/CVE-2016-8610)
* [Debian](https://security-tracker.debian.org/tracker/CVE-2016-8610)

### Related Ubuntu Security Notices (USN)

+ [USN-3183-1](https://usn.ubuntu.com/USN-3183-1)
+ GnuTLS vulnerabilities
+ 1 February 2017

+ [USN-3183-2](https://usn.ubuntu.com/USN-3183-2)
+ GnuTLS vulnerability
+ 20 March 2017

+ [USN-3181-1](https://usn.ubuntu.com/USN-3181-1)
+ OpenSSL vulnerabilities
+ 31 January 2017

### Other references

* <http://www.openwall.com/lists/oss-security/2016/10/24/3>
* <http://security.360.cn/cve/CVE-2016-8610/>
* <https://www.cve.org/CVERecord?id=CVE-2016-8610>