fkie_cve-2025-21994
Vulnerability from fkie_nvd
Published
2025-04-02 14:16
Modified
2025-04-10 13:15
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: ksmbd: fix incorrect validation for num_aces field of smb_acl parse_dcal() validate num_aces to allocate posix_ace_state_array. if (num_aces > ULONG_MAX / sizeof(struct smb_ace *)) It is an incorrect validation that we can create an array of size ULONG_MAX. smb_acl has ->size field to calculate actual number of aces in request buffer size. Use this to check invalid num_aces.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/1b8b67f3c5e5169535e26efedd3e422172e2db64
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/9c4e202abff45f8eac17989e549fc7a75095f675
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/a4cb17797a5d241f1e509cb5b46ed95a80c2f5fd
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/c3a3484d9d31b27a3db0fab91fcf191132d65236
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/d0f87370622a853b57e851f7d5a5452b72300f19
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/f6a6721802ac2f12f4c1bbe839a4c229b61866f2
Impacted products
Vendor Product Version


To clipboard 

{
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nksmbd: fix incorrect validation for num_aces field of smb_acl\n\nparse_dcal() validate num_aces to allocate posix_ace_state_array.\n\nif (num_aces \u003e ULONG_MAX / sizeof(struct smb_ace *))\n\nIt is an incorrect validation that we can create an array of size ULONG_MAX.\nsmb_acl has -\u003esize field to calculate actual number of aces in request buffer\nsize. Use this to check invalid num_aces."
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: ksmbd: Se corrige la validaci\u00f3n incorrecta del campo num_aces de smb_acl. La funci\u00f3n parse_dcal() valida num_aces para asignar posix_ace_state_array. Si (num_aces \u0026gt; ULONG_MAX / sizeof(struct smb_ace *)), se considera una validaci\u00f3n incorrecta que permita crear una matriz de tama\u00f1o ULONG_MAX. smb_acl tiene el campo -\u0026gt;size para calcular el n\u00famero real de ases en el tama\u00f1o del b\u00fafer de solicitud. \u00daselo para comprobar num_aces no v\u00e1lidos."
    }
  ],
  "id": "CVE-2025-21994",
  "lastModified": "2025-04-10T13:15:49.333",
  "metrics": {},
  "published": "2025-04-02T14:16:01.440",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/1b8b67f3c5e5169535e26efedd3e422172e2db64"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/9c4e202abff45f8eac17989e549fc7a75095f675"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/a4cb17797a5d241f1e509cb5b46ed95a80c2f5fd"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/c3a3484d9d31b27a3db0fab91fcf191132d65236"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/d0f87370622a853b57e851f7d5a5452b72300f19"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/f6a6721802ac2f12f4c1bbe839a4c229b61866f2"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Awaiting Analysis"
}


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