CVE-2026-99273

{
  "etk_id": "ETK-2026-3843",
  "cve_id": "CVE-2026-99273",
  "display_id": "CVE-2026-99273",
  "ghsa_id": "GHSA-3jvj-587v-w544",
  "euvd_id": "EUVD-2026-119289",
  "status": "published",
  "anchor_state": "anchored",
  "title": "Out-of-bounds write in Linux kernel ksmbd stream information",
  "summary": "Linux kernel systems using the ksmbd SMB server are affected by an out-of-bounds write in stream-information response handling. An attacker able to send requests that reach the affected ksmbd path may cause a write beyond a small response buffer. Exposure depends on ksmbd being enabled and reachable.",
  "mitigation": "Update the Linux kernel to 6.18.61, 7.3.2, or a release containing one of the listed fixes. Disable ksmbd or restrict SMB access to trusted networks until updates are deployed.",
  "vendor": "Linux",
  "product": "Linux",
  "affected": [
    {
      "affected_notes": [],
      "affected_ranges": [
        ">= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < 06a751809ebd33e95b05bf733697318a17a4872b",
        ">= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < 0e64f89563164719ceb1aa33f2a8bfd6391fa340",
        ">= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < a025c4991a7d83edc4dd339e3ea86d8ff6226eca",
        ">= 0, < 6.18.61",
        ">= 0, < 7.3.2"
      ],
      "ecosystem": null,
      "fixed_versions": [
        "06a751809ebd33e95b05bf733697318a17a4872b",
        "0e64f89563164719ceb1aa33f2a8bfd6391fa340",
        "a025c4991a7d83edc4dd339e3ea86d8ff6226eca",
        "6.18.61",
        "7.3.2"
      ],
      "package_name": "Linux",
      "purl": null
    },
    {
      "affected_notes": [],
      "affected_ranges": [],
      "ecosystem": null,
      "fixed_versions": [],
      "package_name": "Linux",
      "purl": null
    }
  ],
  "cwes": null,
  "cvss_score": null,
  "cvss_src": null,
  "cvss_vector": null,
  "epss_score": null,
  "epss_percentile": null,
  "epss_asof": null,
  "automation": "contextual",
  "check": false,
  "check_confidence_basis": null,
  "exploit": false,
  "pipeline_minutes": 10.349229433333333,
  "t0_at": "2026-11-07T14:08:45.585000+00:00",
  "signals": {
    "trigger_signal": {
      "at": "2026-11-07T14:08:45.585000+00:00",
      "days": 0,
      "is_lower_bound": false,
      "measured_at": "2026-11-07T14:08:45.585000+00:00",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-99273"
    }
  }
}