CVE-2026-74221

{
  "etk_id": "ETK-2026-25",
  "cve_id": "CVE-2026-74221",
  "display_id": "CVE-2026-74221",
  "ghsa_id": "GHSA-r9ch-9wx4-f978",
  "euvd_id": "EUVD-2026-89434",
  "status": "published",
  "anchor_state": "anchored",
  "title": "U-Boot NFS reply buffer overflow",
  "summary": "U-Boot versions before 2026.10-rc5 are affected by a buffer overflow while handling NFS READLINK responses. A malicious or compromised NFS server can corrupt bootloader memory and cause a crash when U-Boot processes a malformed reply; exposure requires U-Boot to communicate with that server for NFS operations.",
  "mitigation": "Upgrade U-Boot to 2026.10-rc5 or later. Until upgrades are complete, restrict boot-time NFS access to trusted, authenticated network paths and servers.",
  "vendor": "u-boot",
  "product": "u-boot",
  "affected": [
    {
      "affected_notes": [],
      "affected_ranges": [
        ">= 0, < 2026.10-rc5"
      ],
      "ecosystem": null,
      "fixed_versions": [
        "2026.10-rc5"
      ],
      "package_name": "u-boot",
      "purl": null
    }
  ],
  "cwes": [
    195
  ],
  "cvss_score": 8.8,
  "cvss_src": "cna_vendor",
  "cvss_vector": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:H/SC:N/SI:N/SA:N",
  "epss_score": 0.0034,
  "epss_percentile": 0.2646,
  "epss_asof": "2026-10-20",
  "automation": "contextual",
  "check": false,
  "check_confidence_basis": null,
  "exploit": false,
  "pipeline_minutes": 31.848561216666667,
  "t0_at": "2026-09-29T21:29:23.283000+00:00",
  "signals": {
    "trigger_signal": {
      "at": "2026-09-29T21:29:23.283000+00:00",
      "days": 0,
      "is_lower_bound": false,
      "measured_at": "2026-09-29T21:29:23.283000+00:00",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-74221"
    }
  }
}