Heap-buffer-overflow in git_oid_raw_cmp

{
  "id": "d51bfd21c47cc2552b0111d1840ba6f6f73aeb4767964e0a1887ffdd235705e4",
  "url": "https://osv.dev/vulnerability/OSV-2023-56",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "Heap-buffer-overflow in git_oid_raw_cmp",
    "summary": "OSS-Fuzz report: https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=55724 ``` Crash type: Heap-buffer-overflow READ {*} Crash state: git_oid_raw_cmp commit_graph_parse_oid_lookup git_commit_graph_file_parse ```",
    "evidence": "osv:OSV-2023-56",
    "products": [
      {
        "name": {
          "value": "libgit2",
          "evidence": "/affected/0/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [],
        "affected_versions": [
          {
            "value": "v1.6.1",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "v1.6.2",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "v1.6.3",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "v1.6.4",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "v1.6.5",
            "evidence": "/affected/0/versions"
          }
        ]
      }
    ],
    "severity": "unknown",
    "structured": {
      "id": "OSV-2023-56",
      "aliases": [
        "OSV-2023-56"
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/libgit2/libgit2",
              "type": "GIT",
              "events": [
                {
                  "introduced": "6de3221debf785c328842667eb04c07c747c73a0"
                },
                {
                  "fixed": "b899fda3d88dc92f50e73544fb7524a1c3c70354"
                }
              ]
            }
          ],
          "package": {
            "name": "libgit2",
            "purl": "pkg:generic/libgit2",
            "ecosystem": "OSS-Fuzz"
          },
          "versions": [
            "v1.6.1",
            "v1.6.2",
            "v1.6.3",
            "v1.6.4",
            "v1.6.5"
          ],
          "database_specific": {
            "source": "https://github.com/google/oss-fuzz-vulns/blob/main/vulns/libgit2/OSV-2023-56.yaml"
          },
          "ecosystem_specific": {
            "severity": "MEDIUM"
          }
        }
      ],
      "modified": "2026-10-20T17:25:19.938468974Z",
      "provider": "osv",
      "references": [
        "https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=55724"
      ]
    },
    "related_cves": [],
    "security_relevant": true,
    "severity_evidence": null
  },
  "source_id": "core-osv",
  "document_id": 389861,
  "published_at": "2023-02-07T13:00:10.989656+00:00"
}