---
title: "CVE-2021-35545\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-2021-35545?format=md
keywords: index, follow
---

# CVE-2021-35545

Publication date 20 October 2021

Last updated 26 August 2025

---

Ubuntu priority

**Medium**

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

## Cvss 3 Severity Score

**6.7 · Medium**

[Score breakdown](https://ubuntu.com/security/CVE-2021-35545?format=md#impact-score)

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## Description

Vulnerability in the Oracle VM VirtualBox product of Oracle Virtualization
(component: Core). The supported version that is affected is Prior to
6.1.28. Easily exploitable vulnerability allows high privileged attacker
with logon to the infrastructure where Oracle VM VirtualBox executes to
compromise Oracle VM VirtualBox. While the vulnerability is in Oracle VM
VirtualBox, attacks may significantly impact additional products.
Successful attacks of this vulnerability can result in unauthorized ability
to cause a hang or frequently repeatable crash (complete DOS) of Oracle VM
VirtualBox and unauthorized read access to a subset of Oracle VM VirtualBox
accessible data. CVSS 3.1 Base Score 6.7 (Confidentiality and Availability
impacts). CVSS Vector: (CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:L/I:N/A:H).

## Status

Show unmaintained releases

| Package | Ubuntu Release | Status |
| --- | --- | --- |
| virtualbox | 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 | Not affected |
| 23.04 lunar | Not affected |
| 22.10 kinetic | Ignored end of life, was needs-triage |
| 22.04 LTS jammy | Needs evaluation |
| 21.10 impish | Ignored end of life |
| 21.04 hirsute | Ignored end of life |
| 20.04 LTS focal | Needs evaluation |
| 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)

## Severity score breakdown

CVSS version:
CVSS v3.0

**Base score**

6.7 · Medium

* Base metrics

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

  | Parameter | Value |
  | --- | --- |
  | Base score | 6.7 · Medium |
  | Exploitability score | - |
  | Impact score | - |

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

## References

* [MITRE](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-35545)
* [NVD](https://nvd.nist.gov/vuln/detail/CVE-2021-35545)
* [Launchpad](https://launchpad.net/bugs/cve/CVE-2021-35545)
* [Debian](https://security-tracker.debian.org/tracker/CVE-2021-35545)

### Other references

* <https://www.oracle.com/security-alerts/cpuoct2021.html>
* <https://www.cve.org/CVERecord?id=CVE-2021-35545>