{
  "schema_version": "1.6.1",
  "id": "RPI-CVE-2025-39838",
  "modified": "2026-10-07T17:22:01Z",
  "upstream": [
    "CVE-2025-39838"
  ],
  "published": "2025-09-19T15:28:22Z",
  "summary": "cifs: prevent NULL pointer dereference in UTF16 conversion",
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\ncifs: prevent NULL pointer dereference in UTF16 conversion\n\nThere can be a NULL pointer dereference bug here. NULL is passed to\n__cifs_sfu_make_node without checks, which passes it unchecked to\ncifs_strndup_to_utf16, which in turn passes it to\ncifs_local_to_utf16_bytes where '*from' is dereferenced, causing a crash.\n\nThis patch adds a check for NULL 'src' in cifs_strndup_to_utf16 and\nreturns NULL early to prevent dereferencing NULL pointer.\n\nFound by Linux Verification Center (linuxtesting.org) with SVACE",
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  "references": [
    {
      "type": "ADVISORY",
      "url": "https://www.cve.org/CVERecord?id=CVE-2025-39838"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/1f797f062b5cf13a1c2bcc23285361baaa7c9260"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/3c26a8d30ed6b53a52a023ec537dc50a6d34a67a"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/70bccd9855dae56942f2b18a08ba137bb54093a0"
    }
  ],
  "database_specific": {
    "source": "https://git.kernel.org/pub/scm/linux/security/vulns.git",
    "upstream_modified": "2026-05-12T04:54:46Z"
  }
}