CVE-2025-38562 (GCVE-0-2025-38562)
Vulnerability from cvelistv5
Published
2025-08-19 17:02
Modified
2025-09-03 12:31
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: ksmbd: fix null pointer dereference error in generate_encryptionkey If client send two session setups with krb5 authenticate to ksmbd, null pointer dereference error in generate_encryptionkey could happen. sess->Preauth_HashValue is set to NULL if session is valid. So this patch skip generate encryption key if session is valid.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/015ef163d65496ae3ba6192c96140a22743f0353
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/2a30ed6428ce83afedca1a6c5c5c4247bcf12d0e
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/96a82e19434a2522525baab59c33332658bc7653
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/9b493ab6f35178afd8d619800df9071992f715de
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/9c2dbbc959e1fcc6f603a1a843e9cf743ba383bb
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/d79c8bebaa622ee223128be7c66d8aaeeb634a57
Impacted products
Vendor Product Version
Linux Linux Version: 0626e6641f6b467447c81dd7678a69c66f7746cf
Version: 0626e6641f6b467447c81dd7678a69c66f7746cf
Version: 0626e6641f6b467447c81dd7678a69c66f7746cf
Version: 0626e6641f6b467447c81dd7678a69c66f7746cf
Version: 0626e6641f6b467447c81dd7678a69c66f7746cf
Version: 0626e6641f6b467447c81dd7678a69c66f7746cf
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   Linux Linux Version: 5.15
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{
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          "programFiles": [
            "fs/smb/server/smb2pdu.c"
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          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nksmbd: fix null pointer dereference error in generate_encryptionkey\n\nIf client send two session setups with krb5 authenticate to ksmbd,\nnull pointer dereference error in generate_encryptionkey could happen.\nsess-\u003ePreauth_HashValue is set to NULL if session is valid.\nSo this patch skip generate encryption key if session is valid."
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      "providerMetadata": {
        "dateUpdated": "2025-09-03T12:31:56.402Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
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        {
          "url": "https://git.kernel.org/stable/c/9b493ab6f35178afd8d619800df9071992f715de"
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      ],
      "title": "ksmbd: fix null pointer dereference error in generate_encryptionkey",
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    "assignerShortName": "Linux",
    "cveId": "CVE-2025-38562",
    "datePublished": "2025-08-19T17:02:39.450Z",
    "dateReserved": "2025-04-16T04:51:24.025Z",
    "dateUpdated": "2025-09-03T12:31:56.402Z",
    "state": "PUBLISHED"
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    "nvd": "{\"cve\":{\"id\":\"CVE-2025-38562\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2025-08-19T17:15:32.653\",\"lastModified\":\"2025-08-20T14:40:17.713\",\"vulnStatus\":\"Awaiting Analysis\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nksmbd: fix null pointer dereference error in generate_encryptionkey\\n\\nIf client send two session setups with krb5 authenticate to ksmbd,\\nnull pointer dereference error in generate_encryptionkey could happen.\\nsess-\u003ePreauth_HashValue is set to NULL if session is valid.\\nSo this patch skip generate encryption key if session is valid.\"},{\"lang\":\"es\",\"value\":\"En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: ksmbd: se corrige el error de desreferencia de puntero nulo en generate_encryptionkey. Si el cliente env\u00eda dos configuraciones de sesi\u00f3n con autenticaci\u00f3n krb5 a ksmbd, podr\u00eda producirse un error de desreferencia de puntero nulo en generate_encryptionkey. \\\"sess-\u0026gt;Preauth_HashValue\\\" se establece en NULL si la sesi\u00f3n es v\u00e1lida. Por lo tanto, este parche omite la generaci\u00f3n de la clave de cifrado si la sesi\u00f3n es v\u00e1lida.\"}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/015ef163d65496ae3ba6192c96140a22743f0353\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/2a30ed6428ce83afedca1a6c5c5c4247bcf12d0e\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/96a82e19434a2522525baab59c33332658bc7653\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/9b493ab6f35178afd8d619800df9071992f715de\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/9c2dbbc959e1fcc6f603a1a843e9cf743ba383bb\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/d79c8bebaa622ee223128be7c66d8aaeeb634a57\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}"
  }
}


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