---
title: "CVE-2022-2906\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-2022-2906?format=md
keywords: index, follow
---

# CVE-2022-2906

Publication date 21 September 2022

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-2022-2906?format=md#impact-score)

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## Description

An attacker can leverage this flaw to gradually erode available memory to
the point where named crashes for lack of resources. Upon restart the
attacker would have to begin again, but nevertheless there is the potential
to deny service.

[Read the notes from the security team](https://ubuntu.com/security/CVE-2022-2906?format=md#notes)

## Status

Show unmaintained releases

| Package | Ubuntu Release | Status |
| --- | --- | --- |
| bind9 | 22.10 kinetic | Fixed 1:9.18.4-2ubuntu2 |
| 22.04 LTS jammy | Fixed 1:9.18.1-1ubuntu1.2 |
| 20.04 LTS focal | Not affected |
| 18.04 LTS bionic | Not affected |
| 16.04 LTS xenial | Not affected |
| 14.04 LTS trusty | Not affected |
| isc-dhcp | 22.10 kinetic | Not affected |
| 22.04 LTS jammy | Not affected |
| 20.04 LTS focal | Not affected |
| 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)

## Notes

---

### [alexmurray](https://launchpad.net/~alexmurray)

As of isc-dhcp-4.4.3-1, isc-dhcp vendors bind9 libs

---

### [mdeslaur](https://launchpad.net/~mdeslaur)

affects 9.18+

## 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-2022-2906)
* [NVD](https://nvd.nist.gov/vuln/detail/CVE-2022-2906)
* [Launchpad](https://launchpad.net/bugs/cve/CVE-2022-2906)
* [Debian](https://security-tracker.debian.org/tracker/CVE-2022-2906)

### Related Ubuntu Security Notices (USN)

+ [USN-5626-1](https://usn.ubuntu.com/USN-5626-1)
+ Bind vulnerabilities
+ 21 September 2022

### Other references

* <https://www.cve.org/CVERecord?id=CVE-2022-2906>