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CVE-2025-39838 cifs: prevent NULL pointer dereference in UTF16 conversion

🗓️ 19 Sep 2025 15:26:13Reported by LinuxType 
cvelist
 cvelist
🔗 www.cve.org👁 12 Views

CIFS UTF16 conversion NULL pointer dereference fixed by NULL src check in cifs_strndup_to_utf16.

Related
Affected
Refs
[
  {
    "product": "Linux",
    "vendor": "Linux",
    "defaultStatus": "unaffected",
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "programFiles": [
      "fs/smb/client/cifs_unicode.c"
    ],
    "versions": [
      {
        "version": "41d3f256c6a5e41eb32b87168399c0facd512dc0",
        "lessThan": "1f797f062b5cf13a1c2bcc23285361baaa7c9260",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "41d3f256c6a5e41eb32b87168399c0facd512dc0",
        "lessThan": "3c26a8d30ed6b53a52a023ec537dc50a6d34a67a",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "41d3f256c6a5e41eb32b87168399c0facd512dc0",
        "lessThan": "70bccd9855dae56942f2b18a08ba137bb54093a0",
        "status": "affected",
        "versionType": "git"
      }
    ]
  },
  {
    "product": "Linux",
    "vendor": "Linux",
    "defaultStatus": "affected",
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "programFiles": [
      "fs/smb/client/cifs_unicode.c"
    ],
    "versions": [
      {
        "version": "6.12",
        "status": "affected"
      },
      {
        "version": "0",
        "lessThan": "6.12",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "6.12.46",
        "lessThanOrEqual": "6.12.*",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "6.16.6",
        "lessThanOrEqual": "6.16.*",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "6.17",
        "lessThanOrEqual": "*",
        "status": "unaffected",
        "versionType": "original_commit_for_fix"
      }
    ]
  }
]

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11 May 2026 21:37Current
EPSS0.00146
12