ghsa-f39x-mp5j-46f3
Vulnerability from github
Published
2025-07-04 15:31
Modified
2025-11-03 18:31
Details

In the Linux kernel, the following vulnerability has been resolved:

ksmbd: fix null pointer dereference in destroy_previous_session

If client set ->PreviousSessionId on kerberos session setup stage, NULL pointer dereference error will happen. Since sess->user is not set yet, It can pass the user argument as NULL to destroy_previous_session. sess->user will be set in ksmbd_krb5_authenticate(). So this patch move calling destroy_previous_session() after ksmbd_krb5_authenticate().

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{
  "affected": [],
  "aliases": [
    "CVE-2025-38191"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2025-07-04T14:15:26Z",
    "severity": null
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nksmbd: fix null pointer dereference in destroy_previous_session\n\nIf client set -\u003ePreviousSessionId on kerberos session setup stage,\nNULL pointer dereference error will happen. Since sess-\u003euser is not\nset yet, It can pass the user argument as NULL to destroy_previous_session.\nsess-\u003euser will be set in ksmbd_krb5_authenticate(). So this patch move\ncalling destroy_previous_session() after ksmbd_krb5_authenticate().",
  "id": "GHSA-f39x-mp5j-46f3",
  "modified": "2025-11-03T18:31:21Z",
  "published": "2025-07-04T15:31:08Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-38191"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/076f1adefb9837977af7ed233883842ddc446644"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/0902625a24eea7fdc187faa5d97df244d159dd6e"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/1193486dffb7432a09f57f5d09049b4d4123538b"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/281afc52e2961cd5dd8326ebc9c5bc40904c0468"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/7ac5b66acafcc9292fb935d7e03790f2b8b2dc0e"
    },
    {
      "type": "WEB",
      "url": "https://lists.debian.org/debian-lts-announce/2025/10/msg00008.html"
    },
    {
      "type": "WEB",
      "url": "https://www.zerodayinitiative.com/advisories/ZDI-25-610"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}


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