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        "cveId": "CVE-2021-32845",
        "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "assignerShortName": "GitHub_M",
        "dateUpdated": "2025-03-10T21:09:53.340Z",
        "dateReserved": "2021-05-12T00:00:00.000Z",
        "datePublished": "2023-02-17T00:00:00.000Z"
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    "containers": {
        "cna": {
            "title": "Moby HyperKit uninitialized memory use vtrnd pci_vtrnd_notify",
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                    "lang": "en",
                    "value": "HyperKit is a toolkit for embedding hypervisor capabilities in an application. In versions 0.20210107 and prior of HyperKit, the implementation of `qnotify` at `pci_vtrnd_notify` fails to check the return value of `vq_getchain`. This leads to `struct iovec iov;` being uninitialized and used to read memory in `len = (int) read(sc->vrsc_fd, iov.iov_base, iov.iov_len);` when an attacker is able to make `vq_getchain` fail. This issue may lead to a guest crashing the host causing a denial of service and, under certain circumstance, memory corruption. This issue is fixed in commit 41272a980197917df8e58ff90642d14dec8fe948."
                }
            ],
            "affected": [
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                    "vendor": "moby",
                    "product": "hyperkit",
                    "versions": [
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                            "version": "0.20210107",
                            "status": "affected",
                            "lessThanOrEqual": "0.20210107",
                            "versionType": "custom"
                        }
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                }
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            "references": [
                {
                    "url": "https://securitylab.github.com/advisories/GHSL-2021-054_057-moby-hyperkit/"
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                {
                    "url": "https://github.com/moby/hyperkit/pull/313"
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                        "attackVector": "LOCAL",
                        "attackComplexity": "LOW",
                        "privilegesRequired": "NONE",
                        "userInteraction": "NONE",
                        "scope": "UNCHANGED",
                        "confidentialityImpact": "NONE",
                        "integrityImpact": "HIGH",
                        "availabilityImpact": "HIGH",
                        "baseScore": 7.7,
                        "baseSeverity": "HIGH"
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                    "descriptions": [
                        {
                            "type": "CWE",
                            "lang": "en",
                            "description": "CWE-908 Use of Uninitialized Resource",
                            "cweId": "CWE-908"
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            "source": {
                "advisory": "GHSL-2021-056",
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                "discovery": "UNKNOWN"
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                "references": [
                    {
                        "url": "https://securitylab.github.com/advisories/GHSL-2021-054_057-moby-hyperkit/",
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                            "content": {
                                "timestamp": "2025-03-10T20:57:22.950584Z",
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                                        "Exploitation": "none"
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