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CVE-2021-32844

20
FAUCET Score

CVE-2021-32844 is a Denial of Service vulnerability in HyperKit, a toolkit for embedding hypervisor capabilities, affecting versions 0.20210107 and prior. A missing null check in the vi_pci_write function can allow a guest to crash the host system. This vulnerability has a CVSS score of 5.5 (Medium), indicating a local attack vector with low complexity, leading to high availability impact. There is currently no evidence of active exploitation, public exploit code, or significant community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
<= 0.20210107CPE matchmatch criteria
cpe:2.3:a:mobyproject:hyperkit:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

6.2MEDIUM

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

Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
Exploitability Score
2.5
Impact Score
3.6
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.23%
Probability of exploitation in next 30 days
EPSS Percentile
14.5%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0023 is in the 63rd percentile among its peer group of 15,940 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.0 Bluesky, 0.0 Mastodon, and 0.1 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (1)

github_advisorypatch availablevia nvd_reference
View patch

References

github.com / moby/hyperkit/commit/451558fe8aaa8b24e02e34106e3bb9fe41d7ad13
Patch
github.com / moby/hyperkit/pull/313
Patch
securitylab.github.com / advisories/GHSL-2021-054_057-moby-hyperkit
Third Party Advisory