---
title: "CVE-2023-45233\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-2023-45233?format=md
keywords: index, follow
---

# CVE-2023-45233

Publication date 16 January 2024

Last updated 4 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-2023-45233?format=md#impact-score)

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## Description

EDK2's Network Package is susceptible to an infinite lop vulnerability when
parsing a PadN option in the Destination Options header of IPv6. This
vulnerability can be exploited by an attacker to gain unauthorized
access and potentially lead to a loss of Availability.

[Read the notes from the security team](https://ubuntu.com/security/CVE-2023-45233?format=md#notes)

## Status

Show unmaintained releases

| Package | Ubuntu Release | Status |
| --- | --- | --- |
| edk2 | 26.04 LTS resolute | Not affected |
| 25.10 questing | Not affected |
| 25.04 plucky | Not affected |
| 24.10 oracular | Not affected |
| 24.04 LTS noble | Not affected |
| 23.10 mantic | Fixed 2023.05-2ubuntu0.1 |
| 23.04 lunar | Ignored end of life, was needs-triage |
| 22.04 LTS jammy | Fixed 2022.02-3ubuntu0.22.04.2 |
| 20.04 LTS focal | Fixed 0~20191122.bd85bf54-2ubuntu3.5 |
| 18.04 LTS bionic | Needs evaluation |
| 16.04 LTS xenial | Needs evaluation |
| 14.04 LTS trusty | Ignored end of standard support |

---

* [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

---

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

shares fixes with CVE-2023-45232
"exposure is limited to PXE boot or HTTP boot"
patchset available in bug 4518, but not in repo (until Feb-24)
fix and unit test commit id likely 7ec488242f6 and d925ff1f00e

## 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-2023-45233)
* [NVD](https://nvd.nist.gov/vuln/detail/CVE-2023-45233)
* [Launchpad](https://launchpad.net/bugs/cve/CVE-2023-45233)
* [Debian](https://security-tracker.debian.org/tracker/CVE-2023-45233)

### Related Ubuntu Security Notices (USN)

+ [USN-6638-1](https://usn.ubuntu.com/USN-6638-1)
+ EDK II vulnerabilities
+ 15 February 2024

### Other references

* <https://blog.quarkslab.com/pixiefail-nine-vulnerabilities-in-tianocores-edk-ii-ipv6-network-stack.html>
* <https://www.openwall.com/lists/oss-security/2024/01/16/2>
* <https://github.com/tianocore/edk2/security/advisories/GHSA-hc6x-cw6p-gj7h>
* <https://www.cve.org/CVERecord?id=CVE-2023-45233>