CVE-2020-25637

Name: CVE-2020-25637
Creator: NVD / NIST
Published: 2020-10-06T14:15:12.527+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 6.7/10EPSS 0.52%

Last modified Jun 17, 2026

CVE-2020-25637 is a medium-severity vulnerability rated 6.7/10 on the CVSS scale. A double free memory issue was found to occur in the libvirt API, in versions before 6.8.0, responsible for requesting information about network interfaces of a running QEMU domain. This flaw affects the polkit access control driver. EPSS estimates a 0.52% chance of exploitation in the next 30 days.

Description

A double free memory issue was found to occur in the libvirt API, in versions before 6.8.0, responsible for requesting information about network interfaces of a running QEMU domain. This flaw affects the polkit access control driver. Specifically, clients connecting to the read-write socket with limited ACL permissions could use this flaw to crash the libvirt daemon, resulting in a denial of service, or potentially escalate their privileges on the system. The highest threat from this vulnerability is to data confidentiality and integrity as well as system availability.

Metrics

CVSS 3.1

6.7/10

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

EPSS Probability

0.52%

40.3th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Redhat	Libvirt	< 6.8.0
Opensuse	Leap	15.1
Opensuse	Leap	15.2

References

http://lists.opensuse.org/opensuse-security-announce/2020-10/msg00072.htmlMailing List, Third Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2020-10/msg00073.htmlMailing List, Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=1881037Issue Tracking, Patch, Vendor Advisory
https://lists.debian.org/debian-lts-announce/2024/04/msg00000.html
https://security.gentoo.org/glsa/202210-06Third Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2020-10/msg00072.htmlMailing List, Third Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2020-10/msg00073.htmlMailing List, Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=1881037Issue Tracking, Patch, Vendor Advisory
https://lists.debian.org/debian-lts-announce/2024/04/msg00000.html
https://security.gentoo.org/glsa/202210-06Third Party Advisory

Timeline

Published: Oct 6, 2020
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2020-25637?

How severe is CVE-2020-25637?

CVE-2020-25637 has a CVSS score of 6.7/10 (MEDIUM severity). The EPSS model estimates a 0.52% probability of exploitation in the next 30 days.

How do I fix CVE-2020-25637?

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-2020-25637?

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

Scan your code now

Source: NVD / NIST