---
title: "CVE-2006-5158\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-2006-5158?format=md
keywords: index, follow
---

# CVE-2006-5158

Publication date 5 October 2006

Last updated 17 July 2025

---

Ubuntu priority

**Medium**

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

## Cvss 3 Severity Score

**7.5 · High**

[Score breakdown](https://ubuntu.com/security/CVE-2006-5158?format=md#impact-score)

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## Description

The nlmclnt\_mark\_reclaim in clntlock.c in NFS lockd in Linux kernel before
2.6.16 allows remote attackers to cause a denial of service (process crash)
and deny access to NFS exports via unspecified vectors that trigger a
kernel oops (null dereference) and a deadlock.

## 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)

## Severity score breakdown

CVSS version:
CVSS v3.0

**Base score**

7.5 · High

* Base metrics

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

  | Parameter | Value |
  | --- | --- |
  | Base score | 7.5 · High |
  | Exploitability score | - |
  | Impact score | - |

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

## References

* [MITRE](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2006-5158)
* [NVD](https://nvd.nist.gov/vuln/detail/CVE-2006-5158)
* [Launchpad](https://launchpad.net/bugs/cve/CVE-2006-5158)
* [Debian](https://security-tracker.debian.org/tracker/CVE-2006-5158)

### Related Ubuntu Security Notices (USN)

+ [USN-395-1](https://usn.ubuntu.com/USN-395-1)
+ Linux kernel vulnerabilities
+ 14 December 2006

### Other references

* <https://www.cve.org/CVERecord?id=CVE-2006-5158>