Heap-buffer-overflow in ucl_object_dtor_unref_single

{
  "id": "26c29edd311b1d4f3e9fa1f934e75a7530996baa86db49b70cdef9b3b67f2024",
  "url": "https://osv.dev/vulnerability/OSV-2023-78",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "Heap-buffer-overflow in ucl_object_dtor_unref_single",
    "summary": "OSS-Fuzz report: https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=56054 ``` Crash type: Heap-buffer-overflow READ 8 Crash state: ucl_object_dtor_unref_single ucl_object_dtor_unref ucl_hash_destroy ```",
    "evidence": "osv:OSV-2023-78",
    "products": [
      {
        "name": {
          "value": "libucl",
          "evidence": "/affected/0/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [],
        "affected_versions": [
          {
            "value": "0.8.2",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "0.9.0",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "0.9.1",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "0.9.2",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "0.9.3",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "0.9.4",
            "evidence": "/affected/0/versions"
          }
        ]
      }
    ],
    "severity": "unknown",
    "structured": {
      "id": "OSV-2023-78",
      "aliases": [
        "OSV-2023-78"
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/vstakhov/libucl",
              "type": "GIT",
              "events": [
                {
                  "introduced": "c4fc60ebb0aa695df1e6642770d512adb9f1af4e"
                }
              ]
            }
          ],
          "package": {
            "name": "libucl",
            "purl": "pkg:generic/libucl",
            "ecosystem": "OSS-Fuzz"
          },
          "versions": [
            "0.8.2",
            "0.9.0",
            "0.9.1",
            "0.9.2",
            "0.9.3",
            "0.9.4"
          ],
          "database_specific": {
            "source": "https://github.com/google/oss-fuzz-vulns/blob/main/vulns/libucl/OSV-2023-78.yaml"
          },
          "ecosystem_specific": {
            "severity": "MEDIUM"
          }
        }
      ],
      "modified": "2026-10-19T14:48:16.950266Z",
      "provider": "osv",
      "references": [
        "https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=56054"
      ]
    },
    "related_cves": [],
    "security_relevant": true,
    "severity_evidence": null
  },
  "source_id": "core-osv",
  "document_id": 375220,
  "published_at": "2023-02-18T13:01:01.445224+00:00"
}