{
  "cveId": "CVE-2026-89632",
  "url": "https://patchblox.com/security/cve/CVE-2026-89632",
  "summary": "CVE-2026-89632 is fixed in linux on 1 platform by DEBIAN-CVE-2026-89632 (version 7.2.6-1), released September 11, 2026. It is not reported as exploited. Patch Radar priority: High.",
  "title": "smb: client: fix use-before-check of ReparseDataLength in reparse_buf_ptr()",
  "description": "In the Linux kernel, the following vulnerability has been resolved:  smb: client: fix use-before-check of ReparseDataLength in reparse_buf_ptr()  reparse_buf_ptr() reads buf-\u003EReparseDataLength before checking that count covers the full fixed header:      buf = (struct reparse_data_buffer *)((u8 *)io \u002B off);     len = sizeof(*buf);                          /* 8 bytes */     rdlen = le16_to_cpu(buf-\u003EReparseDataLength); /* offset 4, 2 bytes */      if (count \u003C len || count \u003C rdlen \u002B len)      /* check comes after */  struct reparse_data_buffer has ReparseDataLength at offset 4.  If a server returns OutputCount \u003C 6, the read at offset 4-5 reaches past the end of the received data.  The off\u002Bcount bounds against iov_len were already validated, but that does not protect against count being smaller than sizeof(*buf).  Split the check: verify count \u003E= sizeof(*buf) before reading ReparseDataLength, then verify count covers the data region.",
  "published": "2026-09-11T20:19:48Z",
  "severity": "Moderate",
  "cvss": 8.2,
  "cvssVector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H",
  "epss": 0.00551,
  "epssPercentile": 0.46312,
  "priority": "High",
  "priorityTier": 3,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "vendorAdvisory": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-89632",
  "fixes": [
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 14",
      "fixedVersion": "7.2.6-1",
      "fix": "DEBIAN-CVE-2026-89632",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-89632",
      "released": "2026-09-11T20:19:48Z"
    }
  ],
  "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"
  }
}