Heap-buffer-overflow in lj_record_idx

{
  "id": "868f7ef7b3a98f924b0af24600ea6fb76d58d49c6ec8131f50b2921bfa42cc07",
  "url": "https://osv.dev/vulnerability/OSV-2026-655",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "Heap-buffer-overflow in lj_record_idx",
    "summary": "OSS-Fuzz report: https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=507646002 ``` Crash type: Heap-buffer-overflow WRITE 8 Crash state: lj_record_idx lj_record_ins trace_state ```",
    "evidence": "osv:OSV-2026-655",
    "products": [
      {
        "name": {
          "value": "tarantool",
          "evidence": "/affected/0/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [],
        "affected_versions": [
          {
            "value": "3.7.0",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "3.7.1",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "3.7.1-entrypoint",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "3.7.2-entrypoint",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "3.8.0",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "3.8.0-entrypoint",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "3.8.1",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "3.8.1-entrypoint",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "3.8.2-entrypoint",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "3.9.0-entrypoint",
            "evidence": "/affected/0/versions"
          }
        ]
      }
    ],
    "severity": "unknown",
    "structured": {
      "id": "OSV-2026-655",
      "aliases": [
        "OSV-2026-655"
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/tarantool/tarantool",
              "type": "GIT",
              "events": [
                {
                  "introduced": "41846ade3585477c8297f06c9fbc4d1e6c16fb83"
                },
                {
                  "fixed": "63d9f01e339f4da711b37bc754199e59ac7216be"
                }
              ]
            }
          ],
          "package": {
            "name": "tarantool",
            "purl": "pkg:generic/tarantool",
            "ecosystem": "OSS-Fuzz"
          },
          "versions": [
            "3.7.0",
            "3.7.1",
            "3.7.1-entrypoint",
            "3.7.2-entrypoint",
            "3.8.0",
            "3.8.0-entrypoint",
            "3.8.1",
            "3.8.1-entrypoint",
            "3.8.2-entrypoint",
            "3.9.0-entrypoint"
          ],
          "database_specific": {
            "source": "https://github.com/google/oss-fuzz-vulns/blob/main/vulns/tarantool/OSV-2026-655.yaml",
            "fixed_range": "d3c3c5f938a3c457566d71332d5a45db64495141:63d9f01e339f4da711b37bc754199e59ac7216be",
            "introduced_range": "83e12796838a74739ba35c740b0e21a442796ec7:dc969d16f6467569f4aa9dc124a31f023b803c22"
          },
          "ecosystem_specific": {
            "severity": "HIGH"
          }
        }
      ],
      "modified": "2026-10-21T23:30:03.960199952Z",
      "provider": "osv",
      "references": [
        "https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=507646002"
      ]
    },
    "related_cves": [],
    "security_relevant": true,
    "severity_evidence": null
  },
  "source_id": "core-osv",
  "document_id": 401090,
  "published_at": "2026-04-30T00:17:44.99983+00:00"
}