CVE-2020-25652

FAUCET Score

CVE-2020-25652 describes a denial-of-service vulnerability in the spice-vdagentd daemon, affecting spice-vdagent versions 0.20 and prior, including various Debian and Fedora distributions. An unprivileged local guest user can exploit a flaw in how the daemon handles client connections via its UNIX domain socket. This allows them to prevent legitimate agents from connecting, leading to system unavailability. The vulnerability has a CVSS score of 5.5 (Medium), indicating a low attack complexity and requiring local user privileges, with the sole impact being high availability loss. There is no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage for this CVE.

Impacted Technologies

Vendor	Product	Version(s)	CPE
		<= 0.20.0CPE matchmatch criteria	cpe:2.3:a:spice-space:spice-vdagent::::::::
		9.0CPE matchmatch criteria	cpe:2.3:o:debian:debian_linux:9.0:::::::*
		32CPE matchmatch criteria	cpe:2.3:o:fedoraproject:fedora:32:::::::*
		33CPE matchmatch criteria	cpe:2.3:o:fedoraproject:fedora:33:::::::*

CVSS Data

CVSS version used by this source: 3.1

5.5MEDIUM

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

Attack Vector

LOCAL

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

HIGH

Exploitability Score

1.8

Impact Score

3.6

CvssVersion

3.1

Exploit Intelligence

EPSS Score

0.43%

Probability of exploitation in next 30 days

EPSS Percentile

35.2%

Percentile rank of EPSS score among Peer Group

As of 2026-07-25

Model: v2026.06.15

This CVE's current EPSS score of 0.0043 is in the 90th percentile among its peer group of 15,937 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.0 Bluesky, 0.0 Mastodon, and 0.1 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (6)

microsoftpatch availablevia msrc

Product: 19198-16823Fixed in: 0.22.1-1

microsoftpatch availablevia msrc

Product: cbl2 spice-vdagent 0.22.1-1 on CBL Mariner 2.0Fixed in: 0.22.1-1

microsoftpatch availablevia msrc

Product: CBL Mariner 2.0 x64Fixed in: 0.22.1-1

microsoftpatch availablevia msrc

Product: CBL Mariner 2.0 ARMFixed in: 0.22.1-1

redhatpatch availablevia nvd_reference

View patch

redhatpatch availablevia redhat_api

Product: Red Hat Enterprise Linux 8Fixed in: spice-vdagent-0:0.20.0-3.el8

View patch

Vendor Advisories (3)

microsoft2022-Jan/CVE-2020-25652

CVE-2020-25652

Jan 11, 2022

microsoft2020-Nov/CVE-2020-25652Moderate

A flaw was found in the spice-vdagentd daemon where it did not properly handle client connections that can be established via the UNIX domain socket in `/run/spice-vdagentd/spice-vdagent-sock`. Any unprivileged local guest user could use this flaw to prevent legitimate agents from connecting to the spice-vdagentd daemon resulting in a denial of service. The highest threat from this vulnerability is to system availability. This flaw affects spice-vdagent versions 0.20 and prior.

Nov 10, 2020

redhatCVE-2020-25652Low

spice-vdagent: possibility to exhaust file descriptors in vdagentd

Nov 3, 2020

References

bugzilla.redhat.com / show_bug.cgi

Issue TrackingPatchThird Party Advisory

lists.debian.org / debian-lts-announce/2021/01/msg00012.html

Mailing ListThird Party Advisory

lists.fedoraproject.org / archives/list/package-announce%40lists.fedoraproject.org/message/GQT56LATVTB2DJOVVJOKQVMVUXYCT2VB

lists.fedoraproject.org / archives/list/package-announce%40lists.fedoraproject.org/message/OIWJ2EIQXWEA2VDBODEATHAT37X4CREP

openwall.com / lists/oss-security/2020/11/04/1

ExploitMailing ListThird Party Advisory