ghsa-4748-h423-7xq4
Vulnerability from github
Published
2025-05-01 15:31
Modified
2025-08-01 09:31
Details

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

ksmbd: fix use-after-free in __smb2_lease_break_noti()

Move tcp_transport free to ksmbd_conn_free. If ksmbd connection is referenced when ksmbd server thread terminates, It will not be freed, but conn->tcp_transport is freed. __smb2_lease_break_noti can be performed asynchronously when the connection is disconnected. __smb2_lease_break_noti calls ksmbd_conn_write, which can cause use-after-free when conn->ksmbd_transport is already freed.

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{
  "affected": [],
  "aliases": [
    "CVE-2025-37777"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2025-05-01T14:15:41Z",
    "severity": null
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nksmbd: fix use-after-free in __smb2_lease_break_noti()\n\nMove tcp_transport free to ksmbd_conn_free. If ksmbd connection is\nreferenced when ksmbd server thread terminates, It will not be freed,\nbut conn-\u003etcp_transport is freed. __smb2_lease_break_noti can be performed\nasynchronously when the connection is disconnected. __smb2_lease_break_noti\ncalls ksmbd_conn_write, which can cause use-after-free\nwhen conn-\u003eksmbd_transport is already freed.",
  "id": "GHSA-4748-h423-7xq4",
  "modified": "2025-08-01T09:31:22Z",
  "published": "2025-05-01T15:31:44Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-37777"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/1aec4d14cf81b7b3e7b69eb1cfa94144eed7138e"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/1da8bd9a10ecd718692732294d15fd801c0eabb5"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/21a4e47578d44c6b37c4fc4aba8ed7cc8dbb13de"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/e59796fc80603bcd8569d4d2e10b213c1918edb4"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}


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