CVE-2021-32843

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Source

https://cve.org/CVERecord?id=CVE-2021-32843

Import Source

https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-32843.json

JSON Data

https://api.osv.dev/v1/vulns/CVE-2021-32843

Published

2023-02-17T23:15:11.803Z

Modified

2026-07-09T01:06:53.485461Z

Severity

5.5 (Medium) CVSS_V3 - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H CVSS Calculator

Summary

[none]

Details

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.

References

Affected packages

Git / github.com/moby/hyperkit

Affected ranges

Type

GIT

Repo

https://github.com/moby/hyperkit

Events

Introduced

Last affected

40cbd5caa9580e2b6de8fef53f4581943c430312

Fixed

df0e46c7dbfd81a957d85e449ba41b52f6f7beb4

Database specific

{
    "source": [
        "CPE_RANGE",
        "REFERENCES"
    ],
    "cpe": "cpe:2.3:a:mobyproject:hyperkit:*:*:*:*:*:*:*:*",
    "extracted_events": [
        {
            "introduced": "0"
        },
        {
            "last_affected": "0.20210107"
        }
    ]
}

Affected versions

v0.*

v0.20170214

v0.20170227

v0.20170425

v0.20170511

v0.20170519

v0.20170904

v0.20171020

v0.20171204

v0.20180621

v0.20190201

v0.20190802

v0.20200224

v0.20200908

v0.20210107

Database specific

source

"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-32843.json"

vanir_signatures

[
    {
        "source": "https://github.com/moby/hyperkit/commit/df0e46c7dbfd81a957d85e449ba41b52f6f7beb4",
        "signature_type": "Line",
        "signature_version": "v1",
        "digest": {
            "line_hashes": [
                "224111426657794017222298120075263625023",
                "82295266099892006206297459276116583600",
                "340041188620932699314649500017566946092",
                "103468498027258180610024703107301908116"
            ],
            "threshold": 0.9
        },
        "id": "CVE-2021-32843-9d723de8",
        "target": {
            "file": "src/lib/virtio.c"
        },
        "deprecated": false
    },
    {
        "source": "https://github.com/moby/hyperkit/commit/df0e46c7dbfd81a957d85e449ba41b52f6f7beb4",
        "signature_type": "Function",
        "signature_version": "v1",
        "digest": {
            "function_hash": "264497553889318156854896604052411427726",
            "length": 2253.0
        },
        "id": "CVE-2021-32843-acce9496",
        "target": {
            "function": "vi_pci_read",
            "file": "src/lib/virtio.c"
        },
        "deprecated": false
    }
]

vanir_signatures_modified

"2026-07-09T01:06:53Z"