{
  "cveId": "CVE-2026-53396",
  "url": "https://patchblox.com/security/cve/CVE-2026-53396",
  "summary": "CVE-2026-53396 is fixed in linux on 1 platform by DEBIAN-CVE-2026-53396 (version 7.1.3-1), released July 20, 2026. It is not reported as exploited. Patch Radar priority: High.",
  "title": "linux: In the Linux kernel, the following vulnerability has been resolved:  nfsd: fix posix_acl leak and ignored error in nf...",
  "description": "In the Linux kernel, the following vulnerability has been resolved:  nfsd: fix posix_acl leak and ignored error in nfsd4_create_file  nfsd4_create_file() has two bugs in its ACL handling:  The return value of nfsd4_acl_to_attr() is silently discarded.  When the NFSv4-to-POSIX ACL conversion fails (e.g., -EINVAL for unsupported ACE types), the file is created without any ACL and the client receives NFS4_OK.  This violates RFC 7530/8881 which require the server to reject unsupported attributes on CREATE.  When start_creating() fails after ACL attributes have been populated in attrs (either via nfsd4_acl_to_attr or via ownership transfer from open-\u003Eop_dpacl/op_pacl), the function jumps to out_write which skips nfsd_attrs_free().  The posix_acl allocations are leaked.  A client can trigger this repeatedly with OPEN(CREATE), ACL attributes, and an invalid filename (e.g., longer than NAME_MAX).  Fix both by capturing the nfsd4_acl_to_attr() return value and by changing the early error paths to jump to out instead of out_write. Initialize child to ERR_PTR(-EINVAL) so that end_creating() is safe to call even if start_creating() was never reached.",
  "published": "2026-07-19T12:16:50Z",
  "severity": "high",
  "cvss": 7.1,
  "cvssVector": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:H",
  "epss": 0.0038,
  "epssPercentile": 0.32189,
  "priority": "High",
  "priorityTier": 3,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "fixes": [
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 14",
      "fixedVersion": "7.1.3-1",
      "fix": "DEBIAN-CVE-2026-53396",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-53396",
      "released": "2026-07-20T12:58:36Z"
    }
  ],
  "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"
  }
}