---
title: "CVE-2005-0109\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-2005-0109?format=md
keywords: index, follow
---

# CVE-2005-0109

Publication date 5 March 2005

Last updated 17 July 2025

---

Ubuntu priority

**Medium**

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

## Cvss 3 Severity Score

**5.6 · Medium**

[Score breakdown](https://ubuntu.com/security/CVE-2005-0109?format=md#impact-score)

Toggle side navigation

## Description

Hyper-Threading technology, as used in FreeBSD and other operating systems
that are run on Intel Pentium and other processors, allows local users to
use a malicious thread to create covert channels, monitor the execution of
other threads, and obtain sensitive information such as cryptographic keys,
via a timing attack on memory cache misses.

## Status

Show unmaintained releases

| Package | Ubuntu Release | Status |
| --- | --- | --- |
| kfreebsd-5 | 7.04 feisty | Fixed 5.4-12 |
| 6.10 edgy | Fixed 5.4-12 |
| 6.06 LTS dapper | Fixed 5.4-12 |

---

* [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**

5.6 · Medium

* Base metrics

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

  | Parameter | Value |
  | --- | --- |
  | Base score | 5.6 · Medium |
  | Exploitability score | - |
  | Impact score | - |

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

## References

* [MITRE](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2005-0109)
* [NVD](https://nvd.nist.gov/vuln/detail/CVE-2005-0109)
* [Launchpad](https://launchpad.net/bugs/cve/CVE-2005-0109)
* [Debian](https://security-tracker.debian.org/tracker/CVE-2005-0109)

### Related Ubuntu Security Notices (USN)

+ [USN-131-1](https://usn.ubuntu.com/USN-131-1)
+ Linux kernel vulnerabilities
+ 23 May 2005

### Other references

* <https://www.cve.org/CVERecord?id=CVE-2005-0109>