{
  "cveId": "CVE-2026-64138",
  "url": "https://patchblox.com/security/cve/CVE-2026-64138",
  "summary": "CVE-2026-64138 is fixed in linux on 1 platform, first by DEBIAN-CVE-2026-64138, released July 20, 2026. It is not reported as exploited. Patch Radar priority: Urgent.",
  "title": "ksmbd: validate SID in parent security descriptor during ACL inheritance",
  "description": "In the Linux kernel, the following vulnerability has been resolved:  ksmbd: validate SID in parent security descriptor during ACL inheritance  Introduce smb_validate_ntsd_sid() helper to safely validate Owner SID and Group SID inside the NT Security Descriptor (smb_ntsd) retrieved from the parent directory.",
  "published": "2026-07-19T16:17:55Z",
  "severity": "Critical",
  "cvss": 9.8,
  "cvssVector": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
  "epss": 0.00447,
  "epssPercentile": 0.39144,
  "priority": "Urgent",
  "priorityTier": 2,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "vendorAdvisory": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-64138",
  "fixes": [
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 13.5 (trixie)",
      "fixedVersion": "6.12.94-1",
      "fix": "DEBIAN-CVE-2026-64138",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-64138",
      "released": "2026-07-20T12:58:36Z"
    },
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 14",
      "fixedVersion": "7.0.12-1",
      "fix": "DEBIAN-CVE-2026-64138",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-64138",
      "released": "2026-07-20T12:58:36Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-08T13:06:02Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}