CVE-2023-3866 (GCVE-0-2023-3866)
Vulnerability from cvelistv5
Published
2025-08-16 13:27
Modified
2025-08-19 05:47
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: ksmbd: validate session id and tree id in the compound request This patch validate session id and tree id in compound request. If first operation in the compound is SMB2 ECHO request, ksmbd bypass session and tree validation. So work->sess and work->tcon could be NULL. If secound request in the compound access work->sess or tcon, It cause NULL pointer dereferecing error.
References
Impacted products
Vendor Product Version
Linux Linux Version: 0626e6641f6b467447c81dd7678a69c66f7746cf
Version: 0626e6641f6b467447c81dd7678a69c66f7746cf
Version: 0626e6641f6b467447c81dd7678a69c66f7746cf
Version: 0626e6641f6b467447c81dd7678a69c66f7746cf
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{
  "containers": {
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      "affected": [
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          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "fs/smb/server/server.c",
            "fs/smb/server/smb2pdu.c"
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          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
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              "version": "5.15"
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              "lessThan": "5.15",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
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            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.121",
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            {
              "lessThanOrEqual": "6.1.*",
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              "version": "6.1.36",
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              "versionType": "original_commit_for_fix"
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              ],
              "negate": false,
              "operator": "OR"
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      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nksmbd: validate session id and tree id in the compound request\n\nThis patch validate session id and tree id in compound request.\nIf first operation in the compound is SMB2 ECHO request, ksmbd bypass\nsession and tree validation. So work-\u003esess and work-\u003etcon could be NULL.\nIf secound request in the compound access work-\u003esess or tcon, It cause\nNULL pointer dereferecing error."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2025-08-19T05:47:13.303Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/eb947403518ea3d93f6d89264bb1f5416bb0c7d0"
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          "url": "https://git.kernel.org/stable/c/854156d12caa9d36de1cf5f084591c7686cc8a9d"
        },
        {
          "url": "https://git.kernel.org/stable/c/d1066c1b3663401cd23c0d6e60cdae750ce00c0f"
        },
        {
          "url": "https://git.kernel.org/stable/c/5005bcb4219156f1bf7587b185080ec1da08518e"
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      ],
      "title": "ksmbd: validate session id and tree id in the compound request",
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  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2023-3866",
    "datePublished": "2025-08-16T13:27:57.332Z",
    "dateReserved": "2023-07-24T14:52:41.881Z",
    "dateUpdated": "2025-08-19T05:47:13.303Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1",
  "vulnerability-lookup:meta": {
    "nvd": "{\"cve\":{\"id\":\"CVE-2023-3866\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2025-08-16T14:15:27.383\",\"lastModified\":\"2025-08-18T20:16:28.750\",\"vulnStatus\":\"Awaiting Analysis\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nksmbd: validate session id and tree id in the compound request\\n\\nThis patch validate session id and tree id in compound request.\\nIf first operation in the compound is SMB2 ECHO request, ksmbd bypass\\nsession and tree validation. So work-\u003esess and work-\u003etcon could be NULL.\\nIf secound request in the compound access work-\u003esess or tcon, It cause\\nNULL pointer dereferecing error.\"},{\"lang\":\"es\",\"value\":\"En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: ksmbd: valida el ID de sesi\u00f3n y el ID de \u00e1rbol en la solicitud compuesta. Este parche valida el ID de sesi\u00f3n y el ID de \u00e1rbol en la solicitud compuesta. Si la primera operaci\u00f3n en la solicitud compuesta es una solicitud ECHO SMB2, ksmbd omite la validaci\u00f3n de sesi\u00f3n y \u00e1rbol. Por lo tanto, work-\u0026gt;sess y work-\u0026gt;tcon podr\u00edan ser NULL. Si la segunda solicitud en la solicitud compuesta accede a work-\u0026gt;sess o tcon, se produce un error de desreferenciaci\u00f3n de puntero NULL.\"}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/5005bcb4219156f1bf7587b185080ec1da08518e\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/854156d12caa9d36de1cf5f084591c7686cc8a9d\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/d1066c1b3663401cd23c0d6e60cdae750ce00c0f\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/eb947403518ea3d93f6d89264bb1f5416bb0c7d0\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}"
  }
}


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