fkie_cve-2025-38562
Vulnerability from fkie_nvd
Published
2025-08-19 17:15
Modified
2025-10-10 16:15
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
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://www.zerodayinitiative.com/advisories/ZDI-25-917/
Impacted products
Vendor Product Version


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{
  "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."
    }
  ],
  "id": "CVE-2025-38562",
  "lastModified": "2025-10-10T16:15:51.707",
  "metrics": {},
  "published": "2025-08-19T17:15:32.653",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "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",
      "url": "https://www.zerodayinitiative.com/advisories/ZDI-25-917/"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Awaiting Analysis"
}


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