CVE-2021-32847

Name: CVE-2021-32847
Creator: NVD / NIST
Published: 2023-02-20T17:15:11.857+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 6.5/10EPSS 0.37%

Last modified Jun 17, 2026

CVE-2021-32847 is a medium-severity vulnerability rated 6.5/10 on the CVSS scale. HyperKit is a toolkit for embedding hypervisor capabilities in an application. In versions 0.20210107 and prior, a malicious guest can trigger a vulnerability in the host by abusing the disk driver that may lead to the disclosure of the host memory into the virtualized guest. EPSS estimates a 0.37% chance of exploitation in the next 30 days.

Description

HyperKit is a toolkit for embedding hypervisor capabilities in an application. In versions 0.20210107 and prior, a malicious guest can trigger a vulnerability in the host by abusing the disk driver that may lead to the disclosure of the host memory into the virtualized guest. This issue is fixed in commit cf60095a4d8c3cb2e182a14415467afd356e982f.

Metrics

CVSS 3.1

6.5/10

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

EPSS Probability

0.37%

28.7th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Mobyproject	Hyperkit	<= 0.20210107

References

https://github.com/moby/hyperkit/blob/2f061e447e1435cdf1b9eda364cea6414f2c606b/src/lib/pci_virtio_block.c#L316Exploit, Product
https://github.com/moby/hyperkit/commit/cf60095a4d8c3cb2e182a14415467afd356e982fPatch
https://securitylab.github.com/advisories/GHSL-2021-058-moby-hyperkit/Exploit, Third Party Advisory
https://github.com/moby/hyperkit/blob/2f061e447e1435cdf1b9eda364cea6414f2c606b/src/lib/pci_virtio_block.c#L316Exploit, Product
https://github.com/moby/hyperkit/commit/cf60095a4d8c3cb2e182a14415467afd356e982fPatch
https://securitylab.github.com/advisories/GHSL-2021-058-moby-hyperkit/Exploit, Third Party Advisory

Timeline

Published: Feb 20, 2023
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-32847?

How severe is CVE-2021-32847?

CVE-2021-32847 has a CVSS score of 6.5/10 (MEDIUM severity). The EPSS model estimates a 0.37% probability of exploitation in the next 30 days.

How do I fix CVE-2021-32847?

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-2021-32847?

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

Scan your code now

Source: NVD / NIST