---
title: "CVE-2015-0565\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-2015-0565?format=md
keywords: index, follow
---

# CVE-2015-0565

Publication date 25 February 2020

Last updated 25 August 2025

---

Ubuntu priority

**Medium**

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

## Cvss 3 Severity Score

**10.0 · Critical**

[Score breakdown](https://ubuntu.com/security/CVE-2015-0565?format=md#impact-score)

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## Description

NaCl in 2015 allowed the CLFLUSH instruction, making rowhammer attacks
possible.

[Read the notes from the security team](https://ubuntu.com/security/CVE-2015-0565?format=md#notes)

## Status

Show unmaintained releases

| Package | Ubuntu Release | Status |
| --- | --- | --- |
| chromium-browser | 20.04 LTS focal | Not in release |
| 18.04 LTS bionic | Ignored |
| 16.04 LTS xenial | Ignored |
| 14.04 LTS trusty | Not in release |

---

* [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

---

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

The Debian chromium source package is called chromium-browser in
Ubuntu

---

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

starting with Ubuntu 19.10, the chromium-browser package is just
a script that installs the Chromium snap

---

### [seth-arnold](https://launchpad.net/~seth-arnold)

Marking this 'ignored'; Chromium's nacl may or may not still exist,
but we'll trust Google to have handled this by now

## Severity score breakdown

CVSS version:
CVSS v3.0

**Base score**

10.0 · Critical

* Base metrics

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

  | Parameter | Value |
  | --- | --- |
  | Base score | 10.0 · Critical |
  | Exploitability score | - |
  | Impact score | - |

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

## References

* [MITRE](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2015-0565)
* [NVD](https://nvd.nist.gov/vuln/detail/CVE-2015-0565)
* [Launchpad](https://launchpad.net/bugs/cve/CVE-2015-0565)
* [Debian](https://security-tracker.debian.org/tracker/CVE-2015-0565)

### Other references

* <https://googleprojectzero.blogspot.com/2015/03/exploiting-dram-rowhammer-bug-to-gain.html>
* <https://bugs.chromium.org/p/project-zero/issues/detail?id=284>
* <https://www.cve.org/CVERecord?id=CVE-2015-0565>