---
title: "CVE-2018-14621\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-2018-14621?format=md
keywords: index, follow
---

# CVE-2018-14621

Publication date 30 August 2018

Last updated 25 August 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-2018-14621?format=md#impact-score)

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## Description

An infinite loop vulnerability was found in libtirpc before version
1.0.2-rc2. With the port to using poll rather than select, exhaustion of
file descriptors would cause the server to enter an infinite loop,
consuming a large amount of CPU time and denying service to other clients
until restarted.

## Status

Show unmaintained releases

| Package | Ubuntu Release | Status |
| --- | --- | --- |
| libtirpc | 18.04 LTS bionic | Not affected |
| 16.04 LTS xenial | Not affected |
| 14.04 LTS trusty | Not affected |

---

* [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-2018-14621?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 |
| --- | --- |
| libtirpc | * Other:   <http://git.linux-nfs.org/?p=steved/libtirpc.git;a=commit;h=fce98161d9815ea016855d9f00274276452c2c4b> |

## 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:3.0/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-2018-14621)
* [NVD](https://nvd.nist.gov/vuln/detail/CVE-2018-14621)
* [Launchpad](https://launchpad.net/bugs/cve/CVE-2018-14621)
* [Debian](https://security-tracker.debian.org/tracker/CVE-2018-14621)

### Other references

* <https://bugzilla.redhat.com/show_bug.cgi?id=1620290>
* <https://bugzilla.novell.com/show_bug.cgi?id=968175>
* <https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-14621>
* <https://www.cve.org/CVERecord?id=CVE-2018-14621>