CVE-2020-25653

Name: CVE-2020-25653
Creator: NVD / NIST
Published: 2020-11-26T02:15:11.933+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 6.3/10EPSS 0.33%

Last modified Jun 17, 2026

CVE-2020-25653 is a medium-severity vulnerability rated 6.3/10 on the CVSS scale. 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. EPSS estimates a 0.33% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1

6.3/10

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

EPSS Probability

0.33%

24.4th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Spice-Space	Spice-Vdagent	<= 0.20.0
Debian	Debian Linux	9.0
Fedoraproject	Fedora	32
Fedoraproject	Fedora	33

References

https://bugzilla.redhat.com/show_bug.cgi?id=1886372Issue Tracking, Patch, Third Party Advisory
https://lists.debian.org/debian-lts-announce/2021/01/msg00012.htmlMailing List, Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/GQT56LATVTB2DJOVVJOKQVMVUXYCT2VB/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/OIWJ2EIQXWEA2VDBODEATHAT37X4CREP/
https://www.openwall.com/lists/oss-security/2020/11/04/1Exploit, Mailing List, Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=1886372Issue Tracking, Patch, Third Party Advisory
https://lists.debian.org/debian-lts-announce/2021/01/msg00012.htmlMailing List, Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/GQT56LATVTB2DJOVVJOKQVMVUXYCT2VB/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/OIWJ2EIQXWEA2VDBODEATHAT37X4CREP/
https://www.openwall.com/lists/oss-security/2020/11/04/1Exploit, Mailing List, Third Party Advisory

Timeline

Published: Nov 26, 2020
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2020-25653?

How severe is CVE-2020-25653?

CVE-2020-25653 has a CVSS score of 6.3/10 (MEDIUM severity). The EPSS model estimates a 0.33% probability of exploitation in the next 30 days.

How do I fix CVE-2020-25653?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2020-25653?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST