---
title: "CVE-2006-1856\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-2006-1856?format=md
keywords: index, follow
---

# CVE-2006-1856

Publication date 19 May 2006

Last updated 17 July 2025

---

Ubuntu priority

**Medium**

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

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## Description

Certain modifications to the Linux kernel 2.6.16 and earlier do not add the
appropriate Linux Security Modules (LSM) file\_permission hooks to the (1)
readv and (2) writev functions, which might allow attackers to bypass
intended access restrictions.

## Status

Show unmaintained releases

---

* [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-2006-1856)
* [NVD](https://nvd.nist.gov/vuln/detail/CVE-2006-1856)
* [Launchpad](https://launchpad.net/bugs/cve/CVE-2006-1856)
* [Debian](https://security-tracker.debian.org/tracker/CVE-2006-1856)

### Related Ubuntu Security Notices (USN)

+ [USN-302-1](https://usn.ubuntu.com/USN-302-1)
+ Linux kernel vulnerabilities
+ 15 June 2006

### Other references

* <https://www.cve.org/CVERecord?id=CVE-2006-1856>