{
  "cveId": "CVE-2026-90169",
  "url": "https://patchblox.com/security/cve/CVE-2026-90169",
  "summary": "CVE-2026-90169 is fixed in 2 products on 1 platform, first by DEBIAN-CVE-2026-90169, released September 23, 2026. It is not reported as exploited. Patch Radar priority: High.",
  "title": "ksmbd: free preauth sessions on connection teardown",
  "description": "In the Linux kernel, the following vulnerability has been resolved:  ksmbd: free preauth sessions on connection teardown  SMB3.1.1 multichannel binding preserves the preauthentication hash in a preauth_session between the NTLM negotiate and authenticate requests. The binding NTLM negotiate allocates this object and returns STATUS_MORE_PROCESSING_REQUIRED. If the client disconnects before it sends the authenticate request, neither the authenticate nor error cleanup paths free the object.  Release any remaining preauthentication sessions when tearing down the connection. Initialize the list when allocating the connection so that this cleanup is safe regardless of the negotiated dialect.",
  "published": "2026-09-17T17:17:10Z",
  "severity": "Important",
  "cvss": 7.8,
  "epss": 0.00247,
  "epssPercentile": 0.16052,
  "priority": "High",
  "priorityTier": 3,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "vendorAdvisory": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-90169",
  "fixes": [
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 13.5 (trixie)",
      "fixedVersion": "6.12.111-1",
      "fix": "DEBIAN-CVE-2026-90169",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-90169",
      "released": "2026-09-23T19:19:02Z"
    },
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 14",
      "fixedVersion": "7.2.6-1",
      "fix": "DEBIAN-CVE-2026-90169",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-90169",
      "released": "2026-09-23T19:19:02Z"
    },
    {
      "platform": "linux",
      "product": "linux-6.12",
      "release": "Debian 12.15 (bookworm)",
      "fixedVersion": "6.12.111-1~deb12u1",
      "fix": "DEBIAN-CVE-2026-90169",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-90169",
      "released": "2026-09-23T19:19:02Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-08T06:59:42Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}