---
title: "CVE-2010-0309\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-2010-0309?format=md
keywords: index, follow
---

# CVE-2010-0309

Publication date 12 February 2010

Last updated 24 July 2024

---

Ubuntu priority

**Medium**

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

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## Description

The pit\_ioport\_read function in the Programmable Interval Timer (PIT)
emulation in i8254.c in KVM 83 does not properly use the pit\_state data
structure, which allows guest OS users to cause a denial of service (host
OS crash or hang) by attempting to read the /dev/port file.

### From the Ubuntu Security Team

Marcelo Tosatti discovered that the Linux kernel's hardware virtualization
did not correctly handle reading the /dev/port special device. A local
attacker in a guest operating system could issue a specific read that would
cause the host system to crash, leading to a denial of service.

## Status

Show unmaintained releases

| Package | Ubuntu Release | Status |
| --- | --- | --- |
| kvm | 11.04 natty | Not in release |
| 10.10 maverick | Not in release |
| 10.04 LTS lucid | Not in release |
| 9.10 karmic | Not in release |
| 9.04 jaunty | Ignored end of life |
| 8.10 intrepid | Ignored end of life, was needed |
| 8.04 LTS hardy | Ignored end of life |
| 6.06 LTS dapper | Not in release |
| linux | 11.04 natty | Not affected |
| 10.10 maverick | Not affected |
| 10.04 LTS lucid | Not affected |
| 9.10 karmic | Fixed 2.6.31-20.58 |
| 9.04 jaunty | Fixed 2.6.28-18.60 |
| 8.10 intrepid | Fixed 2.6.27-17.46 |
| 8.04 LTS hardy | Fixed 2.6.24-27.68 |
| 6.06 LTS dapper | Not in release |
| linux-ec2 | 11.04 natty | Not in release |
| 10.10 maverick | Ignored end of life |
| 10.04 LTS lucid | Not affected |
| 9.10 karmic | Fixed 2.6.31-305.13 |
| 9.04 jaunty | Not in release |
| 8.10 intrepid | Not in release |
| 8.04 LTS hardy | Not in release |
| 6.06 LTS dapper | Not in release |
| linux-fsl-imx51 | 11.04 natty | Not in release |
| 10.10 maverick | Not in release |
| 10.04 LTS lucid | Not affected |
| 9.10 karmic | Fixed 2.6.31-109.25 |
| 8.04 LTS hardy | Not in release |
| 6.06 LTS dapper | Not in release |
| linux-lts-backport-maverick | 11.04 natty | Not in release |
| 10.10 maverick | Not in release |
| 10.04 LTS lucid | Not affected |
| 9.10 karmic | Not in release |
| 9.04 jaunty | Not in release |
| 8.10 intrepid | Not in release |
| 8.04 LTS hardy | Not in release |
| 6.06 LTS dapper | Not in release |
| linux-mvl-dove | 11.04 natty | Not in release |
| 10.10 maverick | Not affected |
| 10.04 LTS lucid | Not affected |
| 9.10 karmic | Fixed 2.6.31-212.26 |
| 8.04 LTS hardy | Not in release |
| 6.06 LTS dapper | Not in release |
| linux-source-2.6.15 | 11.04 natty | Not in release |
| 10.10 maverick | Not in release |
| 10.04 LTS lucid | Not in release |
| 9.10 karmic | Not in release |
| 9.04 jaunty | Not in release |
| 8.10 intrepid | Not in release |
| 8.04 LTS hardy | Not in release |
| 6.06 LTS dapper | Not affected |
| linux-ti-omap4 | 11.04 natty | Not affected |
| 10.10 maverick | Not affected |
| 10.04 LTS lucid | Not in release |
| 9.10 karmic | Not in release |
| 8.04 LTS hardy | Not in release |
| 6.06 LTS dapper | 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)
* [Patch details](https://ubuntu.com/security/CVE-2010-0309?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 |
| --- | --- |
| linux | * Proposed:   <http://www.mail-archive.com/kvm@vger.kernel.org/msg28002.html> |

## References

* [MITRE](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2010-0309)
* [NVD](https://nvd.nist.gov/vuln/detail/CVE-2010-0309)
* [Launchpad](https://launchpad.net/bugs/cve/CVE-2010-0309)
* [Debian](https://security-tracker.debian.org/tracker/CVE-2010-0309)

### Related Ubuntu Security Notices (USN)

+ [USN-914-1](https://usn.ubuntu.com/USN-914-1)
+ Linux kernel vulnerabilities
+ 17 March 2010

### Other references

* <https://www.cve.org/CVERecord?id=CVE-2010-0309>