{
  "containers": {
    "cna": {
      "affected": [
        {
          "product": "filelock",
          "vendor": "tox-dev",
          "versions": [
            {
              "status": "affected",
              "version": "\u003e= 3.22.0, \u003c 4.2.1"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "filelock is a platform-independent file lock for Python. From 3.22.0 until 4.2.1, soft lock classes on Windows read an existing marker with _read_lock_file and remove a stale marker through break_lock_file using pathname operations that wait for an oplock break. Another local account with read access to an unheld marker can keep a Level 1 or batch oplock unanswered, causing SoftFileLock.acquire and related async or fallback locks to wait beyond timeout, blocking=False, and cancel_check. A stale marker under the oplock cannot be broken, but mutual exclusion remains intact and no file other than the marker is accessed. This issue is fixed in version 4.2.1."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "attackComplexity": "HIGH",
            "attackVector": "LOCAL",
            "availabilityImpact": "LOW",
            "baseScore": 2.5,
            "baseSeverity": "LOW",
            "confidentialityImpact": "NONE",
            "integrityImpact": "NONE",
            "privilegesRequired": "LOW",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:L",
            "version": "3.1"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-667",
              "description": "CWE-667: Improper Locking",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-11-05T21:50:04.632Z",
        "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "shortName": "GitHub_M"
      },
      "references": [
        {
          "name": "https://github.com/tox-dev/filelock/security/advisories/GHSA-567q-5qvw-pf92",
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://github.com/tox-dev/filelock/security/advisories/GHSA-567q-5qvw-pf92"
        },
        {
          "name": "https://github.com/tox-dev/filelock/pull/835",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/tox-dev/filelock/pull/835"
        },
        {
          "name": "https://github.com/tox-dev/filelock/commit/97d694a9a3ee1721d6c79a480174dfd9b060a080",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/tox-dev/filelock/commit/97d694a9a3ee1721d6c79a480174dfd9b060a080"
        },
        {
          "name": "https://github.com/tox-dev/filelock/commit/e1e825b1992f69fb6b346dc395d5ae4893536c0a",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/tox-dev/filelock/commit/e1e825b1992f69fb6b346dc395d5ae4893536c0a"
        },
        {
          "name": "https://github.com/tox-dev/filelock/releases/tag/4.2.1",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/tox-dev/filelock/releases/tag/4.2.1"
        }
      ],
      "source": {
        "advisory": "GHSA-567q-5qvw-pf92",
        "discovery": "UNKNOWN"
      },
      "title": "filelock: On Windows an oplock on a soft lock\u0027s marker holds SoftFileLock.acquire() past its timeout and blocks the stale break"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
    "assignerShortName": "GitHub_M",
    "cveId": "CVE-2026-112907",
    "datePublished": "2026-11-05T21:50:04.632Z",
    "dateReserved": "2026-10-19T20:16:09.857Z",
    "dateUpdated": "2026-11-05T21:50:04.632Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}