smb/server: fix possible memory leak in smb2_read()

{
  "id": "a8b51e74c32889239fe5e24484fae435229b6072a7979de66ba71825e7e9aa85",
  "url": "https://osv.dev/vulnerability/CVE-2025-40286",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "smb/server: fix possible memory leak in smb2_read()",
    "summary": "In the Linux kernel, the following vulnerability has been resolved: smb/server: fix possible memory leak in smb2_read() Memory leak occurs when ksmbd_vfs_read() fails. Fix this by adding the missing kvfree().",
    "evidence": "osv:CVE-2025-40286",
    "products": [
      {
        "name": {
          "value": "Kernel",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
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            "evidence": "/affected/1/ranges"
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            "value": "6.6.117",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.12.59",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.17.9",
            "evidence": "/affected/1/ranges"
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        ],
        "affected_versions": []
      }
    ],
    "severity": "unknown",
    "structured": {
      "id": "CVE-2025-40286",
      "aliases": [
        "CVE-2025-40286"
      ],
      "affected": [
        {
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              "type": "GIT",
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                  "fixed": "0797c6cf3b857cc229ab2bc69552938dcd738d78"
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                  "fixed": "f1305587731886da37a214cda812ade246c653b0"
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                  "fixed": "6fced056d2cc8d01b326e6fcfabaacb9850b71a4"
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          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2025-40286.json"
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
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                  "introduced": "5.15.0"
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                {
                  "fixed": "6.1.159"
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              ]
            },
            {
              "type": "ECOSYSTEM",
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                  "introduced": "6.2.0"
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            {
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                  "introduced": "6.7.0"
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                {
                  "fixed": "6.12.59"
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            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.13.0"
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                {
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          ],
          "package": {
            "name": "Kernel",
            "ecosystem": "Linux"
          },
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2025-40286.json"
          }
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      ],
      "modified": "2026-10-28T02:30:37.391218121Z",
      "provider": "osv",
      "references": [
        "https://git.kernel.org/stable/c/0797c6cf3b857cc229ab2bc69552938dcd738d78",
        "https://git.kernel.org/stable/c/63d8706a2c09a0c29b8b0e8a44bc7a1339685de9",
        "https://git.kernel.org/stable/c/6fced056d2cc8d01b326e6fcfabaacb9850b71a4",
        "https://git.kernel.org/stable/c/bfda5422a16651d0bf864ec468b1c216e1b10d91",
        "https://git.kernel.org/stable/c/f1305587731886da37a214cda812ade246c653b0",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/40xxx/CVE-2025-40286.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2025-40286",
        "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
      ],
      "provider_metadata": {
        "cna_assigner": "Linux",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/40xxx/CVE-2025-40286.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2025-40286",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": null
  },
  "source_id": "core-osv",
  "document_id": 504522,
  "published_at": "2025-12-06T21:51:12.169+00:00"
}