How severe is CVE-2021-32847?

CVE-2021-32847 has a CVSS 3.x base score of 7.1, rated high severity. It is exploitable over local access with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.

Is CVE-2021-32847 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (29th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-32847?

CVE-2021-32847 affects Mobyproject Hyperkit. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-32847?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2021-32847 published?

CVE-2021-32847 was published on 2023-02-20 and last updated on 2026-06-17.

CVE-2021-32847

CVE-2021-32847 is a high-severity vulnerability in Mobyproject Hyperkit with a CVSS 3.x base score of 7.1. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-125.

Key facts

Severity: High (CVSS 3.x base score 7.1)
EPSS exploit prediction: 0% (29th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-125
Affected product: Mobyproject Hyperkit
Published: 2023-02-20
Last modified: 2026-06-17

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.

Frequently asked questions

What is CVE-2021-32847?: 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.
How severe is CVE-2021-32847?: CVE-2021-32847 has a CVSS 3.x base score of 7.1, rated high severity. It is exploitable over local access with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.
Is CVE-2021-32847 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (29th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-32847?: CVE-2021-32847 affects Mobyproject Hyperkit. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-32847?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2021-32847 published?: CVE-2021-32847 was published on 2023-02-20 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:mobyproject:hyperkit:*:*:*:*:*:*:*:*

More vulnerabilities in Mobyproject Hyperkit

CVE-2021-32846 — High (CVSS 7.7): HyperKit is a toolkit for embedding hypervisor capabilities in an application. In versions 0.20210107, function…
CVE-2021-32845 — High (CVSS 7.7): HyperKit is a toolkit for embedding hypervisor capabilities in an application. In versions 0.20210107 and prior of…
CVE-2021-32844 — Medium (CVSS 6.2): HyperKit is a toolkit for embedding hypervisor capabilities in an application. In versions 0.20210107 and prior of…
CVE-2021-32843 — Medium (CVSS 6.2): HyperKit is a toolkit for embedding hypervisor capabilities in an application. In versions 0.20210107 and prior of…

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