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

{
  "id": "8b20733361f12354d6cf858335a444f9505fee791fdc1ceb25c2e2d6c82e9fa7",
  "url": "https://osv.dev/vulnerability/CVE-2025-37777",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "ksmbd: fix use-after-free in __smb2_lease_break_noti()",
    "summary": "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.",
    "evidence": "osv:CVE-2025-37777",
    "products": [
      {
        "name": {
          "value": "Kernel",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "6.6.101",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.12.26",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.14.4",
            "evidence": "/affected/1/ranges"
          }
        ],
        "affected_versions": []
      }
    ],
    "severity": "high",
    "structured": {
      "id": "CVE-2025-37777",
      "aliases": [
        "CVE-2025-37777"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0626e6641f6b467447c81dd7678a69c66f7746cf"
                },
                {
                  "fixed": "1da8bd9a10ecd718692732294d15fd801c0eabb5"
                },
                {
                  "fixed": "1aec4d14cf81b7b3e7b69eb1cfa94144eed7138e"
                },
                {
                  "fixed": "e59796fc80603bcd8569d4d2e10b213c1918edb4"
                },
                {
                  "fixed": "21a4e47578d44c6b37c4fc4aba8ed7cc8dbb13de"
                }
              ]
            }
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2025-37777.json"
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "5.15.0"
                },
                {
                  "fixed": "6.6.101"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.7.0"
                },
                {
                  "fixed": "6.12.26"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.13.0"
                },
                {
                  "fixed": "6.14.4"
                }
              ]
            }
          ],
          "package": {
            "name": "Kernel",
            "ecosystem": "Linux"
          },
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2025-37777.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:25.910488844Z",
      "provider": "osv",
      "references": [
        "https://git.kernel.org/stable/c/1aec4d14cf81b7b3e7b69eb1cfa94144eed7138e",
        "https://git.kernel.org/stable/c/1da8bd9a10ecd718692732294d15fd801c0eabb5",
        "https://git.kernel.org/stable/c/21a4e47578d44c6b37c4fc4aba8ed7cc8dbb13de",
        "https://git.kernel.org/stable/c/e59796fc80603bcd8569d4d2e10b213c1918edb4",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/37xxx/CVE-2025-37777.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2025-37777",
        "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
      ],
      "provider_metadata": {
        "cna_assigner": "Linux",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/37xxx/CVE-2025-37777.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2025-37777",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 492233,
  "published_at": "2025-05-01T13:07:15.741+00:00"
}