{
  "schema_version": "1.6.1",
  "id": "RPI-CVE-2026-31612",
  "modified": "2026-10-09T11:39:44Z",
  "upstream": [
    "CVE-2026-31612"
  ],
  "published": "2026-04-24T14:43:40Z",
  "summary": "ksmbd: validate EaNameLength in smb2_get_ea()",
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nksmbd: validate EaNameLength in smb2_get_ea()\n\nsmb2_get_ea() reads ea_req->EaNameLength from the client request and\npasses it directly to strncmp() as the comparison length without\nverifying that the length of the name really is the size of the input\nbuffer received.\n\nFix this up by properly checking the size of the name based on the value\nreceived and the overall size of the request, to prevent a later\nstrncmp() call to use the length as a \"trusted\" size of the buffer.\nWithout this check, uninitialized heap values might be slowly leaked to\nthe client.",
  "severity": [
    {
      "type": "CVSS_V3",
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N"
    }
  ],
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      "url": "https://www.cve.org/CVERecord?id=CVE-2026-31612"
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      "scenario": "AV:N - ksmbd is an in-kernel SMB server reachable over TCP/445, and the vulnerable path is triggered by a remote SMB2 QUERY_INFO request for FILE_FULL_EA_INFORMATION.\nAC:L - The attacker can craft the InputBufferLength/EaNameLength mismatch directly and repeatedly; there is no race or condition outside attacker control beyond reaching a normal share/file with extended attributes.\nPR:N - The path requires a valid SMB session, tree connection, and file handle, but ksmbd supports guest/anonymous sessions and guest-accessible shares, making unauthenticated exploitation reasonable in the highest-severity deployment scenario.\nUI:N - No victim action is required after the SMB service and share are available; the attacker sends protocol requests directly.\nS:U - The vulnerable component and impacted memory are within the same kernel security authority, with no VM, sandbox, or separate authorization boundary crossed.\nC:H - The unchecked EaNameLength causes an out-of-bounds heap read in strncmp(), and the fix explicitly describes leaking uninitialized heap values to the client; under the required guidance, out-of-bounds reads are High unless strictly limited to a few bytes.\nI:N - The bug is an over-read used for comparison and response selection, with no out-of-bounds write or direct data modification primitive identified.\nA:N - The demonstrated impact is information disclosure from a bounded heap over-read, and the investigated path does not show a reliable kernel panic, hang, or memory corruption condition."
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}