fkie_cve-2025-37778
Vulnerability from fkie_nvd
Published
2025-05-01 14:15
Modified
2025-11-03 20:18
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: ksmbd: Fix dangling pointer in krb_authenticate krb_authenticate frees sess->user and does not set the pointer to NULL. It calls ksmbd_krb5_authenticate to reinitialise sess->user but that function may return without doing so. If that happens then smb2_sess_setup, which calls krb_authenticate, will be accessing free'd memory when it later uses sess->user.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/1db2451de23e98bc864c6a6e52aa0d82c91cb325
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/1e440d5b25b7efccb3defe542a73c51005799a5f
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/6e30c0e10210c714f3d4453dc258d4abcc70364e
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/d5b554bc8d554ed6ddf443d3db2fad9f665cec10
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/e83e39a5f6a01a81411a4558a59a10f87aa88dd6
af854a3a-2127-422b-91ae-364da2661108https://lists.debian.org/debian-lts-announce/2025/05/msg00045.html
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 dangling pointer in krb_authenticate\n\nkrb_authenticate frees sess-\u003euser and does not set the pointer\nto NULL. It calls ksmbd_krb5_authenticate to reinitialise\nsess-\u003euser but that function may return without doing so. If\nthat happens then smb2_sess_setup, which calls krb_authenticate,\nwill be accessing free\u0027d memory when it later uses sess-\u003euser."
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: ksmbd: Se corrige el puntero colgante en krb_authenticate. krb_authenticate libera sess-\u0026gt;user y no establece el puntero en NULL. Llama a ksmbd_krb5_authenticate para reinicializar sess-\u0026gt;user, pero es posible que esta funci\u00f3n no lo retorne. Si esto ocurre, smb2_sess_setup, que llama a krb_authenticate, acceder\u00e1 a la memoria liberada cuando utilice posteriormente sess-\u0026gt;user."
    }
  ],
  "id": "CVE-2025-37778",
  "lastModified": "2025-11-03T20:18:33.913",
  "metrics": {},
  "published": "2025-05-01T14:15:41.617",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/1db2451de23e98bc864c6a6e52aa0d82c91cb325"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/1e440d5b25b7efccb3defe542a73c51005799a5f"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/6e30c0e10210c714f3d4453dc258d4abcc70364e"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/d5b554bc8d554ed6ddf443d3db2fad9f665cec10"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/e83e39a5f6a01a81411a4558a59a10f87aa88dd6"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "url": "https://lists.debian.org/debian-lts-announce/2025/05/msg00045.html"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Undergoing Analysis"
}


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