What is CVE-2020-25652?

CVE-2020-25652 is a medium-severity vulnerability in Spice-Space Spice-Vdagent, classified under Allocation of Resources Without Limits or Throttling. CVSS score: 5.5/10. Published 2020-11-26.

How severe is CVE-2020-25652?

Medium severity. CVSS v3 base score is 5.5 out of 10.

Resource exhaustion in Spice-Space Spice-Vdagent

CVE-2020-25652

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.

Published 2020-11-26 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 5.5 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.

EPSS exploit prediction

EPSS: 0.004 (35.4th percentile), scored 2026-09-29.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 35th percentile — 35.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.004 · newest: 0.004 · change: 0.000

Affected products

Spice-Space Spice-Vdagent
Debian Linux — versions 9.0
Fedoraproject Fedora — versions 32, 33
Spice-Vdagent — versions spice-vdagent versions 0.20 and prior

Weakness classification (CWE)

CWE-770 — Allocation of Resources Without Limits or Throttling

References

www.openwall.com/lists/oss-security/2020/11/04/1 (Exploit, Mailing List, Third Party Advisory)
bugzilla.redhat.com/show_bug.cgi (Patch, Third Party Advisory, Issue Tracking)
lists.debian.org/debian-lts-announce/2021/01/msg00012.html (mailing-list, Mailing List, Third Party Advisory)
lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/… (vendor-advisory)
lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/… (vendor-advisory)

Frequently asked questions

What is CVE-2020-25652?: CVE-2020-25652 is a medium-severity vulnerability in Spice-Space Spice-Vdagent, classified under Allocation of Resources Without Limits or Throttling. CVSS score: 5.5/10. Published 2020-11-26.
How severe is CVE-2020-25652?: Medium severity. CVSS v3 base score is 5.5 out of 10.