---
title: "CVE-2015-8616\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-2015-8616?format=md
keywords: index, follow
---

# CVE-2015-8616

Publication date 19 January 2016

Last updated 25 August 2025

---

Ubuntu priority

**Medium**

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

## Cvss 3 Severity Score

**8.6 · High**

[Score breakdown](https://ubuntu.com/security/CVE-2015-8616?format=md#impact-score)

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## Description

Use-after-free vulnerability in the Collator::sortWithSortKeys function in
ext/intl/collator/collator\_sort.c in PHP 7.x before 7.0.1 allows remote
attackers to cause a denial of service (application crash) or possibly have
unspecified other impact by leveraging the relationships between a key
buffer and a destroyed array.

[Read the notes from the security team](https://ubuntu.com/security/CVE-2015-8616?format=md#notes)

## Status

Show unmaintained releases

| Package | Ubuntu Release | Status |
| --- | --- | --- |
| php5 | 15.10 wily | Not affected |
| 15.04 vivid | Not affected |
| 14.04 LTS trusty | Not affected |
| 12.04 LTS precise | 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)

## Notes

---

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

only php 7.x

## Severity score breakdown

CVSS version:
CVSS v3.0

**Base score**

8.6 · High

* Base metrics

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

  | Parameter | Value |
  | --- | --- |
  | Base score | 8.6 · High |
  | Exploitability score | - |
  | Impact score | - |

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

## References

* [MITRE](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2015-8616)
* [NVD](https://nvd.nist.gov/vuln/detail/CVE-2015-8616)
* [Launchpad](https://launchpad.net/bugs/cve/CVE-2015-8616)
* [Debian](https://security-tracker.debian.org/tracker/CVE-2015-8616)

### Other references

* <https://bugs.php.net/bug.php?id=71020>
* <http://www.openwall.com/lists/oss-security/2015/12/22/4>
* <https://www.cve.org/CVERecord?id=CVE-2015-8616>