---
title: "CVE-2020-25653\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-2020-25653?format=md
keywords: index, follow
---

# CVE-2020-25653

Publication date 3 November 2020

Last updated 18 August 2025

---

Ubuntu priority

**Low**

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

## Cvss 3 Severity Score

**6.3 · Medium**

[Score breakdown](https://ubuntu.com/security/CVE-2020-25653?format=md#impact-score)

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## Description

A race condition vulnerability was found in the way the spice-vdagentd
daemon handled new client connections. This flaw may allow an unprivileged
local guest user to become the active agent for spice-vdagentd, possibly
resulting in a denial of service or information leakage from the host. The
highest threat from this vulnerability is to data confidentiality as well
as system availability. This flaw affects spice-vdagent versions 0.20 and
prior.

## Status

Show unmaintained releases

| Package | Ubuntu Release | Status |
| --- | --- | --- |
| spice-vdagent | 26.04 LTS resolute | Fixed 0.20.0-1ubuntu0.1 |
| 25.10 questing | Fixed 0.20.0-1ubuntu0.1 |
| 25.04 plucky | Fixed 0.20.0-1ubuntu0.1 |
| 24.10 oracular | Fixed 0.20.0-1ubuntu0.1 |
| 24.04 LTS noble | Fixed 0.20.0-1ubuntu0.1 |
| 23.10 mantic | Fixed 0.20.0-1ubuntu0.1 |
| 23.04 lunar | Fixed 0.20.0-1ubuntu0.1 |
| 22.10 kinetic | Fixed 0.20.0-1ubuntu0.1 |
| 22.04 LTS jammy | Fixed 0.20.0-1ubuntu0.1 |
| 21.10 impish | Fixed 0.20.0-1ubuntu0.1 |
| 21.04 hirsute | Fixed 0.20.0-1ubuntu0.1 |
| 20.10 groovy | Fixed 0.20.0-1ubuntu0.1 |
| 20.04 LTS focal | Fixed 0.19.0-2ubuntu0.2 |
| 18.04 LTS bionic | Fixed 0.17.0-1ubuntu2.2 |
| 16.04 LTS xenial | Vulnerable |
| 14.04 LTS trusty | Not in release |

---

* [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**

6.3 · Medium

* Base metrics

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

  | Parameter | Value |
  | --- | --- |
  | Base score | 6.3 · Medium |
  | Exploitability score | - |
  | Impact score | - |

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

## References

* [MITRE](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-25653)
* [NVD](https://nvd.nist.gov/vuln/detail/CVE-2020-25653)
* [Launchpad](https://launchpad.net/bugs/cve/CVE-2020-25653)
* [Debian](https://security-tracker.debian.org/tracker/CVE-2020-25653)

### Related Ubuntu Security Notices (USN)

+ [USN-4617-1](https://usn.ubuntu.com/USN-4617-1)
+ SPICE vdagent vulnerabilities
+ 4 November 2020

### Other references

* <https://www.openwall.com/lists/oss-security/2020/11/04/1>
* <https://www.cve.org/CVERecord?id=CVE-2020-25653>