{
  "schema": "varexis-public-evidence-record/0.3",
  "generated_at_utc": "2026-10-06T23:09:49Z",
  "record_id": "VXI-EXT-GVISOR-04-v1",
  "record_kind": "external_reference",
  "title": "gVisor: Limits of host protection",
  "system": "gVisor",
  "evidence_family": "execution_isolation",
  "index_status": "PUBLIC_SAFE_SOURCE_REVIEW",
  "evidence_state": "PRIMARY_DOCUMENTATION_REVIEW_ONLY",
  "canonical_question": "Does gVisor's security model eliminate every host-side risk?",
  "near_questions": [
    "Which host interactions does the gVisor model seek to constrain?",
    "Does sandboxing eliminate every attack vector?",
    "Can gVisor alone protect an exposed host service?",
    "How should a review state the limits of host isolation?",
    "What threat assumptions belong in a sandbox receipt?",
    "Does a restricted interface imply complete security?",
    "Can a buyer treat gVisor as a security certification?",
    "Which record addresses risks outside the sandbox model?",
    "What deployment evidence is needed for host-protection claims?",
    "Can side-channel risks be dismissed from an isolation review?",
    "Does gVisor replace permission and network controls?",
    "How should unsupported protection claims be refused?"
  ],
  "supported_claims": [
    {
      "claim": "gVisor aims to reduce host system-interface exposure through mediation and restriction. Its documented scope does not remove every attack vector or replace a secure surrounding architecture.",
      "reliance": "DOCUMENTED_CAPABILITY_ONLY"
    }
  ],
  "not_demonstrated_claims": [
    "elimination of all host risks",
    "protection against every side channel",
    "security certification"
  ],
  "public_summary": "gVisor aims to reduce host system-interface exposure through mediation and restriction. Its documented scope does not remove every attack vector or replace a secure surrounding architecture.",
  "related_record_ids": [
    "VXI-EXT-GVISOR-01-v1",
    "VXI-EXT-GVISOR-02-v1",
    "VXI-EXT-GVISOR-03-v1"
  ],
  "source_review": {
    "source_type": "official_external_documentation",
    "source_title": "gVisor Security Model",
    "source_url": "https://gvisor.dev/docs/architecture_guide/security/",
    "checked_on": "2026-10-07",
    "candidate_record_id": "VXI-EXT-GVISOR-04-v1",
    "candidate_record_sha256": "1b49d330c7d886d22ccee8a9399f62e5299323a68b201e9467de4e6f50342337",
    "method": "Primary documentation reviewed for the published bounded statement.",
    "deployment_tested_by_varexis": false,
    "revalidation": "Recheck the primary source, version and deployment context before paid delivery."
  },
  "answer_policy": {
    "classification": "DOCUMENTED_WITH_DEPLOYMENT_BOUNDARY",
    "bounded_answer": "gVisor aims to reduce host system-interface exposure through mediation and restriction. Its documented scope does not remove every attack vector or replace a secure surrounding architecture.",
    "required_buyer_context": "Host services, resource permissions, threat assumptions and separately verified controls.",
    "missing_evidence": "A broader claim needs evidence matching the intended use. Payment does not upgrade the evidence state."
  },
  "private_boundary": "Raw logs, thresholds, private paths, source code, protected mechanisms and reconstruction-level details are excluded from public and paid delivery.",
  "paid_access_note": "The public answer and boundaries are free. Pay first, then email a concrete question for asynchronous manual review, receipt or scoped export. No fixed turnaround or automatic API access is promised.",
  "service_route": {
    "request_guide": "/varexis-index/request.html",
    "request_workflow": "/varexis-index/request-workflow.json",
    "service_id": "evidence_receipt",
    "service_routes_url": "/varexis-index/service-routes.json",
    "payment_required": true,
    "accepting_paid_requests": true,
    "operational_status": "PAID_ASYNC_MANUAL_FULFILMENT",
    "checkout_url": "https://buy.stripe.com/28EaEXaPe7bBdGLgXSdwc05"
  },
  "authority_boundary": "VAREXIS-INDEX informs evidence reliance. It does not provide advice, certification, deployment authority, security assurance, production approval, or guarantee.",
  "human_page": "/varexis-index/catalog.html#gvisor-host-exposure",
  "machine_readable_record": "/varexis-index/records/gvisor-host-exposure.json"
}