Security advisory

{
  "id": "b32fac724d23fddae44ee99318ba74d603a27c063a4ab144300e535a49f4d058",
  "url": "https://osv.dev/vulnerability/CVE-2021-3746",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2021-3746",
    "summary": "A flaw was found in the libtpms code that may cause access beyond the boundary of internal buffers. The vulnerability is triggered by specially-crafted TPM2 command packets that then trigger the issue when the state of the TPM2's volatile state is written. The highest threat from this vulnerability is to system availability. This issue affects libtpms versions before 0.8.5, before 0.7.9 and before 0.6.6.",
    "evidence": "osv:CVE-2021-3746",
    "products": [],
    "severity": "medium",
    "structured": {
      "id": "CVE-2021-3746",
      "aliases": [
        "CVE-2021-3746"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/stefanberger/libtpms",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0b60a4479009c9aa98210fac763a536fefd9228b"
                },
                {
                  "fixed": "24adfb75804f573c63f16b3065165754dddfb1f7"
                },
                {
                  "introduced": "d061d8065b74a16d918a007e844b1ab66f4bdb8b"
                },
                {
                  "fixed": "3461a606f488bc6321f09b2b967688c158d2ce26"
                },
                {
                  "introduced": "3fd4b94903061e156e64dc6a738237df2aebba09"
                },
                {
                  "fixed": "18ba4c0206cea9ea235056ec6fd06c6494d6ed14"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:libtpms_project:libtpms:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "0.6.0"
                      },
                      {
                        "fixed": "0.6.6"
                      }
                    ],
                    "source": "CPE_RANGE"
                  },
                  {
                    "cpe": "cpe:2.3:a:libtpms_project:libtpms:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "0.7.0"
                      },
                      {
                        "fixed": "0.7.9"
                      }
                    ],
                    "source": "CPE_RANGE"
                  },
                  {
                    "cpe": "cpe:2.3:a:libtpms_project:libtpms:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "0.8.0"
                      },
                      {
                        "fixed": "0.8.5"
                      }
                    ],
                    "source": "CPE_RANGE"
                  }
                ]
              }
            }
          ],
          "versions": [
            "v0.6.5",
            "v0.7.8",
            "v0.8.4",
            "v0.6.4",
            "v0.8.3",
            "v0.7.7",
            "v0.8.2",
            "v0.8.1",
            "v0.7.6",
            "v0.6.3",
            "v0.8.0",
            "v0.7.5",
            "v0.7.4",
            "v0.7.3",
            "v0.6.2",
            "v0.7.2",
            "v0.7.1",
            "v0.6.1",
            "v0.7.0",
            "v0.6.0"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-3746.json"
          }
        }
      ],
      "modified": "2026-10-24T10:30:20.097167229Z",
      "provider": "osv",
      "references": [
        "https://bugzilla.redhat.com/show_bug.cgi?id=1998588"
      ],
      "provider_metadata": {
        "unresolved_ranges": [
          {
            "cpes": [
              "cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:*"
            ],
            "vendor_product": "fedoraproject:fedora",
            "extracted_events": [
              {
                "range": [
                  {
                    "introduced": "34"
                  },
                  {
                    "last_affected": "34"
                  }
                ],
                "source": "CPE_STRING"
              }
            ]
          },
          {
            "cpes": [
              "cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:-:*:*:*",
              "cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:advanced_virtualization:*:*:*"
            ],
            "vendor_product": "redhat:enterprise_linux",
            "extracted_events": [
              {
                "range": [
                  {
                    "introduced": "8.0"
                  },
                  {
                    "last_affected": "8.0"
                  },
                  {
                    "introduced": "8.0"
                  },
                  {
                    "last_affected": "8.0"
                  }
                ],
                "source": "CPE_STRING"
              }
            ]
          }
        ]
      }
    },
    "related_cves": [
      {
        "value": "CVE-2021-3746",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 430180,
  "published_at": "2021-10-19T15:15:08.003+00:00"
}