Security advisory

{
  "id": "a32bd15b7bea6507315278f36865b333cf0a00f392cc64cb090a7592a79c39c2",
  "url": "https://osv.dev/vulnerability/CVE-2021-32845",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2021-32845",
    "summary": "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.",
    "evidence": "osv:CVE-2021-32845",
    "products": [],
    "severity": "high",
    "structured": {
      "id": "CVE-2021-32845",
      "aliases": [
        "CVE-2021-32845"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/moby/hyperkit",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "last_affected": "40cbd5caa9580e2b6de8fef53f4581943c430312"
                },
                {
                  "fixed": "41272a980197917df8e58ff90642d14dec8fe948"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:mobyproject:hyperkit:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "last_affected": "0.20210107"
                      }
                    ],
                    "source": "CPE_RANGE"
                  },
                  {
                    "range": [
                      {
                        "fixed": "41272a980197917df8e58ff90642d14dec8fe948"
                      }
                    ],
                    "source": "REFERENCES_COMMIT"
                  }
                ]
              }
            }
          ],
          "versions": [
            "v0.20210107",
            "v0.20200908",
            "v0.20200224",
            "v0.20190802",
            "v0.20190201",
            "v0.20180621",
            "v0.20171204",
            "v0.20171020",
            "v0.20170904",
            "v0.20170519",
            "v0.20170511",
            "v0.20170425",
            "v0.20170227",
            "v0.20170214"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-32845.json",
            "vanir_signatures": [
              {
                "id": "CVE-2021-32845-61f7972e",
                "digest": {
                  "length": 495,
                  "function_hash": "310043126656173523047379725801967880239"
                },
                "source": "https://github.com/moby/hyperkit/commit/41272a980197917df8e58ff90642d14dec8fe948",
                "target": {
                  "file": "src/lib/pci_virtio_rnd.c",
                  "function": "pci_vtrnd_notify"
                },
                "deprecated": false,
                "signature_type": "Function",
                "signature_version": "v1"
              },
              {
                "id": "CVE-2021-32845-ef690adc",
                "digest": {
                  "threshold": 0.9,
                  "line_hashes": [
                    "313427961420582974340249393305992632339",
                    "206001336668488359012814060866514161300",
                    "256515945538833497297681925219737940193",
                    "18215666424238618820492140631593916169",
                    "216513535212053987493370348725693915922",
                    "755233976114824510165496030115338788",
                    "80441343336273934510724666271259445792",
                    "339653611464416608273907080567137430736"
                  ]
                },
                "source": "https://github.com/moby/hyperkit/commit/41272a980197917df8e58ff90642d14dec8fe948",
                "target": {
                  "file": "src/lib/pci_virtio_rnd.c"
                },
                "deprecated": false,
                "signature_type": "Line",
                "signature_version": "v1"
              }
            ],
            "vanir_signatures_modified": "2026-10-20T14:23:25Z"
          }
        }
      ],
      "modified": "2026-10-20T14:23:25.336279408Z",
      "provider": "osv",
      "references": [
        "https://securitylab.github.com/advisories/GHSL-2021-054_057-moby-hyperkit/",
        "https://github.com/moby/hyperkit/commit/41272a980197917df8e58ff90642d14dec8fe948",
        "https://github.com/moby/hyperkit/pull/313"
      ],
      "provider_metadata": {}
    },
    "related_cves": [
      {
        "value": "CVE-2021-32845",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 388856,
  "published_at": "2023-02-17T23:15:11.963+00:00"
}