Stack-buffer-overflow in InterpretCondition

{
  "id": "e6965d6bfa102291b8af9a26788d105949116d143e83595e01f1c0841f24115a",
  "url": "https://osv.dev/vulnerability/OSV-2021-802",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "Stack-buffer-overflow in InterpretCondition",
    "summary": "OSS-Fuzz report: https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=34692 ``` Crash type: Stack-buffer-overflow READ 1 Crash state: InterpretCondition InterpretPhoneme MakePhonemeList ```",
    "evidence": "osv:OSV-2021-802",
    "products": [
      {
        "name": {
          "value": "espeak-ng",
          "evidence": "/affected/0/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [],
        "affected_versions": [
          {
            "value": "1.51",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "1.52.0",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "1.51.1",
            "evidence": "/affected/0/versions"
          }
        ]
      }
    ],
    "severity": "unknown",
    "structured": {
      "id": "OSV-2021-802",
      "aliases": [
        "OSV-2021-802"
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/espeak-ng/espeak-ng",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0a713d52bbf3e061823d1a7f35e5303e7320f27a"
                },
                {
                  "fixed": "3dcbe7ea3ea85a9212968d0f05172dde4259e770"
                },
                {
                  "fixed": "bdfae6f2624ac4f0ccb2f3e5c3163d4e84c3bc2d"
                }
              ]
            }
          ],
          "package": {
            "name": "espeak-ng",
            "purl": "pkg:generic/espeak-ng",
            "ecosystem": "OSS-Fuzz"
          },
          "versions": [
            "1.51",
            "1.52.0",
            "1.51.1"
          ],
          "database_specific": {
            "source": "https://github.com/google/oss-fuzz-vulns/blob/main/vulns/espeak-ng/OSV-2021-802.yaml",
            "fixed_range": "b54bb99624a1896eec30cd3f546cd3b6a8e76fda:3dcbe7ea3ea85a9212968d0f05172dde4259e770"
          },
          "ecosystem_specific": {
            "severity": "MEDIUM"
          }
        }
      ],
      "modified": "2026-10-20T17:24:01.650451712Z",
      "provider": "osv",
      "references": [
        "https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=34692"
      ]
    },
    "related_cves": [],
    "security_relevant": true,
    "severity_evidence": null
  },
  "source_id": "core-osv",
  "document_id": 389797,
  "published_at": "2021-05-27T00:00:31.797718+00:00"
}