CVE-2021-3947

Name: CVE-2021-3947
Creator: NVD / NIST
Published: 2022-02-18T18:15:09.75+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 5.5/10EPSS 0.31%

Last modified Jun 17, 2026

CVE-2021-3947 is a medium-severity vulnerability rated 5.5/10 on the CVSS scale. A stack-buffer-overflow was found in QEMU in the NVME component. The flaw lies in nvme_changed_nslist() where a malicious guest controlling certain input can read out of bounds memory. EPSS estimates a 0.31% chance of exploitation in the next 30 days.

Description

A stack-buffer-overflow was found in QEMU in the NVME component. The flaw lies in nvme_changed_nslist() where a malicious guest controlling certain input can read out of bounds memory. A malicious user could use this flaw leading to disclosure of sensitive information.

Metrics

CVSS 3.1

5.5/10

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

EPSS Probability

0.31%

22.9th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions	Update
Qemu	Qemu	>= 6.0.0, <= 6.1.0	—
Qemu	Qemu	6.2.0	Rc0

References

https://bugzilla.redhat.com/show_bug.cgi?id=2021869Issue Tracking, Patch, Vendor Advisory
https://security.gentoo.org/glsa/202208-27Third Party Advisory
https://security.netapp.com/advisory/ntap-20220318-0003/Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=2021869Issue Tracking, Patch, Vendor Advisory
https://security.gentoo.org/glsa/202208-27Third Party Advisory
https://security.netapp.com/advisory/ntap-20220318-0003/Third Party Advisory

Timeline

Published: Feb 18, 2022
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-3947?

How severe is CVE-2021-3947?

CVE-2021-3947 has a CVSS score of 5.5/10 (MEDIUM severity). The EPSS model estimates a 0.31% probability of exploitation in the next 30 days.

How do I fix CVE-2021-3947?

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-2021-3947?

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

Scan your code now

Source: NVD / NIST