What’s Vulnerable › Vulnerabilities

CVE-2021-32843

• Severity: medium (CVSS 5.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2023-02-17 · updated 2026-06-17
• Weakness: CWE-476

Description

HyperKit is a toolkit for embedding hypervisor capabilities in an application. In versions 0.20210107 and prior of HyperKit, `virtio.c` has is a call to `vc_cfgread` that does not check for null which when called makes the host crash. This issue may lead to a guest crashing the host causing a denial of service. This issue is fixed in commit df0e46c7dbfd81a957d85e449ba41b52f6f7beb4.

Affected products

• moby hyperkit: through 0.20210107

References

• https://github.com/moby/hyperkit/commit/df0e46c7dbfd81a957d85e449ba41b52f6f7beb4
• https://github.com/moby/hyperkit/pull/313
• https://securitylab.github.com/advisories/GHSL-2021-054_057-moby-hyperkit/
• https://github.com/moby/hyperkit/commit/df0e46c7dbfd81a957d85e449ba41b52f6f7beb4
• https://github.com/moby/hyperkit/pull/313
• https://securitylab.github.com/advisories/GHSL-2021-054_057-moby-hyperkit/

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