CVE-2021-3607

Name: CVE-2021-3607
Creator: NVD / NIST
Published: 2022-02-24T19:15:09.113+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 6/10EPSS 0.30%

Last modified Jun 17, 2026

CVE-2021-3607 is a medium-severity vulnerability rated 6/10 on the CVSS scale. An integer overflow was found in the QEMU implementation of VMWare's paravirtual RDMA device in versions prior to 6.1.0. The issue occurs while handling a "PVRDMA_REG_DSRHIGH" write from the guest due to improper input validation. EPSS estimates a 0.30% chance of exploitation in the next 30 days.

Description

An integer overflow was found in the QEMU implementation of VMWare's paravirtual RDMA device in versions prior to 6.1.0. The issue occurs while handling a "PVRDMA_REG_DSRHIGH" write from the guest due to improper input validation. This flaw allows a privileged guest user to make QEMU allocate a large amount of memory, resulting in a denial of service. The highest threat from this vulnerability is to system availability.

Metrics

CVSS 3.1

6/10

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

EPSS Probability

0.30%

21.5th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Qemu	Qemu	< 6.1.0
Debian	Debian Linux	10.0
Fedoraproject	Fedora	34

References

https://bugzilla.redhat.com/show_bug.cgi?id=1973349Issue Tracking, Third Party Advisory
https://lists.debian.org/debian-lts-announce/2022/09/msg00008.htmlMailing List, Third Party Advisory
https://lists.gnu.org/archive/html/qemu-devel/2021-06/msg07925.htmlMailing List, Patch, Third Party Advisory
https://security.gentoo.org/glsa/202208-27Third Party Advisory
https://security.netapp.com/advisory/ntap-20220318-0002/Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=1973349Issue Tracking, Third Party Advisory
https://lists.debian.org/debian-lts-announce/2022/09/msg00008.htmlMailing List, Third Party Advisory
https://lists.gnu.org/archive/html/qemu-devel/2021-06/msg07925.htmlMailing List, Patch, Third Party Advisory
https://security.gentoo.org/glsa/202208-27Third Party Advisory
https://security.netapp.com/advisory/ntap-20220318-0002/Third Party Advisory

Timeline

Published: Feb 24, 2022
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-3607?

How severe is CVE-2021-3607?

CVE-2021-3607 has a CVSS score of 6/10 (MEDIUM severity). The EPSS model estimates a 0.30% probability of exploitation in the next 30 days.

How do I fix CVE-2021-3607?

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-2021-3607?

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

Scan your code now

Source: NVD / NIST