CVE-2020-27661

Name: CVE-2020-27661
Creator: NVD / NIST
Published: 2021-06-02T16:15:08.32+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 6.5/10EPSS 0.31%

Last modified Jun 17, 2026

CVE-2020-27661 is a medium-severity vulnerability rated 6.5/10 on the CVSS scale. A divide-by-zero issue was found in dwc2_handle_packet in hw/usb/hcd-dwc2.c in the hcd-dwc2 USB host controller emulation of QEMU. A malicious guest could use this flaw to crash the QEMU process on the host, resulting in a denial of service.. EPSS estimates a 0.31% chance of exploitation in the next 30 days.

Description

A divide-by-zero issue was found in dwc2_handle_packet in hw/usb/hcd-dwc2.c in the hcd-dwc2 USB host controller emulation of QEMU. A malicious guest could use this flaw to crash the QEMU process on the host, resulting in a denial of service.

Metrics

CVSS 3.1

6.5/10

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

EPSS Probability

0.31%

23.1th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-369

Affected Software

Vendor	Product	Versions
Qemu	Qemu	<= 5.1.1

References

https://bugzilla.redhat.com/show_bug.cgi?id=1890653Issue Tracking, Patch, Third Party Advisory
https://git.qemu.org/?p=qemu.git%3Ba=commit%3Bh=bea2a9e3e00b275dc40cfa09c760c715b8753e03
https://lists.nongnu.org/archive/html/qemu-devel/2020-10/msg04263.htmlMailing List, Patch, Third Party Advisory
https://security.netapp.com/advisory/ntap-20210720-0010/Third Party Advisory
https://www.mail-archive.com/debian-bugs-dist%40lists.debian.org/msg1770368.html
https://bugzilla.redhat.com/show_bug.cgi?id=1890653Issue Tracking, Patch, Third Party Advisory
https://git.qemu.org/?p=qemu.git%3Ba=commit%3Bh=bea2a9e3e00b275dc40cfa09c760c715b8753e03
https://lists.nongnu.org/archive/html/qemu-devel/2020-10/msg04263.htmlMailing List, Patch, Third Party Advisory
https://security.netapp.com/advisory/ntap-20210720-0010/Third Party Advisory
https://www.mail-archive.com/debian-bugs-dist%40lists.debian.org/msg1770368.html

Timeline

Published: Jun 2, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2020-27661?

How severe is CVE-2020-27661?

CVE-2020-27661 has a CVSS score of 6.5/10 (MEDIUM severity). The EPSS model estimates a 0.31% probability of exploitation in the next 30 days.

How do I fix CVE-2020-27661?

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-2020-27661?

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

Scan your code now

Source: NVD / NIST