Windows-only. On Windows an oplock on a soft lock's marker file holds SoftFileLock.acquire() past its timeout and blocks the stale break. The fix (PR #835) is Windows ctypes code. Echo builds and ship

{
  "id": "eca2f0561d839adc0c1923bcd9c23f9b447ef7e0503043e2c285d71c9654ad05",
  "url": "https://osv.dev/vulnerability/ECHO-096e-d4a5-60b2",
  "method": "structured",
  "payload": {
    "kind": "withdrawal",
    "title": "Windows-only. On Windows an oplock on a soft lock's marker file holds SoftFileLock.acquire() past its timeout and blocks the stale break. The fix (PR #835) is Windows ctypes code. Echo builds and ship",
    "summary": "Windows-only. On Windows an oplock on a soft lock's marker file holds SoftFileLock.acquire() past its timeout and blocks the stale break. The fix (PR #835) is Windows ctypes code. Echo builds and ships this library for Linux only, where the affected code path is not reached.",
    "evidence": "osv:ECHO-096e-d4a5-60b2",
    "products": [
      {
        "name": {
          "value": "filelock",
          "evidence": "/affected/0/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "4.2.1",
            "evidence": "/affected/0/ranges"
          }
        ],
        "affected_versions": []
      }
    ],
    "severity": "unknown",
    "structured": {
      "id": "ECHO-096e-d4a5-60b2",
      "aliases": [
        "ECHO-096e-d4a5-60b2"
      ],
      "affected": [
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "4.2.1"
                }
              ]
            }
          ],
          "package": {
            "name": "filelock",
            "purl": "pkg:pypi/filelock",
            "ecosystem": "Echo:PyPI"
          },
          "database_specific": {
            "source": "https://advisory.echohq.com/osv/ECHO-096e-d4a5-60b2.json"
          }
        }
      ],
      "modified": "2026-10-26T14:45:07.790246190Z",
      "provider": "osv",
      "upstream": [
        "CVE-2026-112907",
        "GHSA-567q-5qvw-pf92"
      ],
      "references": [
        "https://advisory.echohq.com/cve/CVE-2026-112907"
      ]
    },
    "related_cves": [
      {
        "value": "CVE-2026-112907",
        "evidence": "/upstream"
      }
    ],
    "security_relevant": true,
    "severity_evidence": null
  },
  "source_id": "core-osv",
  "document_id": 454247,
  "published_at": "2026-10-25T00:00:39.015+00:00"
}