---
title: "CVE-2004-0565\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-2004-0565?format=md
keywords: index, follow
---

# CVE-2004-0565

Publication date 6 December 2004

Last updated 17 July 2025

---

Ubuntu priority

**Medium**

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

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## Description

Floating point information leak in the context switch code for Linux 2.4.x
only checks the MFH bit but does not verify the FPH owner, which allows
local users to read register values of other processes by setting the MFH
bit.

## Status

Show unmaintained releases

| Package | Ubuntu Release | Status |
| --- | --- | --- |
| kernel-source-2.4.27 | 7.04 feisty | Not in release |
| 6.10 edgy | Fixed 2.4.27-12 |
| 6.06 LTS dapper | Fixed 2.4.27-12 |

---

* [How can I get the fixes?](https://ubuntu.com/security/cves/about#security)
* [What do statuses mean?](https://ubuntu.com/security/cves/about#statuses)

## References

* [MITRE](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2004-0565)
* [NVD](https://nvd.nist.gov/vuln/detail/CVE-2004-0565)
* [Launchpad](https://launchpad.net/bugs/cve/CVE-2004-0565)
* [Debian](https://security-tracker.debian.org/tracker/CVE-2004-0565)

### Other references

* <https://www.cve.org/CVERecord?id=CVE-2004-0565>