smb/server: fix null-ptr-deref in ksmbd_ipc_tree_connect_request()

{
  "id": "16b90e297d457c651e8b8bae6139a4efe17547d4f680b3fe0678d65a75924fbc",
  "url": "https://osv.dev/vulnerability/CVE-2026-90166",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "smb/server: fix null-ptr-deref in ksmbd_ipc_tree_connect_request()",
    "summary": "In the Linux kernel, the following vulnerability has been resolved: smb/server: fix null-ptr-deref in ksmbd_ipc_tree_connect_request() See the procedure below: ksmbd_tree_conn_connect ksmbd_share_config_get share->name = kstrdup() // fail if (!test_share_config_flag(share, KSMBD_SHARE_FLAG_PIPE)) // false // do not check `share->name` ksmbd_ipc_tree_connect_request strlen(share->name) // null-ptr-deref",
    "evidence": "osv:CVE-2026-90166",
    "products": [
      {
        "name": {
          "value": "Kernel",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "6.1.191",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.6.160",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.12.110",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.18.52",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "7.2.6",
            "evidence": "/affected/1/ranges"
          }
        ],
        "affected_versions": []
      }
    ],
    "severity": "unknown",
    "structured": {
      "id": "CVE-2026-90166",
      "aliases": [
        "CVE-2026-90166"
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
              "type": "GIT",
              "events": [
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                  "introduced": "e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9"
                },
                {
                  "fixed": "d601be98c9445894c759c28d4a7a52151387f1fb"
                },
                {
                  "fixed": "5ffd180307a5ea34dae7f90ff9573ebed6b7fb12"
                },
                {
                  "fixed": "4eb74a34ea401abfbbd5991076715dae3de938df"
                },
                {
                  "fixed": "8461f27902727ad434375caf13a0100aafc0340f"
                },
                {
                  "fixed": "7065d3648b1a48d2c49da3d6364dd3c4d503b10c"
                },
                {
                  "fixed": "d2ccf905f47d2344270749f4dfa905afcd3edeb0"
                }
              ]
            }
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-90166.json"
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "5.15.0"
                },
                {
                  "fixed": "6.1.191"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.2.0"
                },
                {
                  "fixed": "6.6.160"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.7.0"
                },
                {
                  "fixed": "6.12.110"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.13.0"
                },
                {
                  "fixed": "6.18.52"
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              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.19.0"
                },
                {
                  "fixed": "7.2.6"
                }
              ]
            }
          ],
          "package": {
            "name": "Kernel",
            "ecosystem": "Linux"
          },
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-90166.json"
          }
        }
      ],
      "modified": "2026-11-01T02:31:01.455322490Z",
      "provider": "osv",
      "references": [
        "https://git.kernel.org/stable/c/4eb74a34ea401abfbbd5991076715dae3de938df",
        "https://git.kernel.org/stable/c/5ffd180307a5ea34dae7f90ff9573ebed6b7fb12",
        "https://git.kernel.org/stable/c/7065d3648b1a48d2c49da3d6364dd3c4d503b10c",
        "https://git.kernel.org/stable/c/8461f27902727ad434375caf13a0100aafc0340f",
        "https://git.kernel.org/stable/c/d2ccf905f47d2344270749f4dfa905afcd3edeb0",
        "https://git.kernel.org/stable/c/d601be98c9445894c759c28d4a7a52151387f1fb",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/90xxx/CVE-2026-90166.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-90166",
        "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/2026/90xxx/CVE-2026-90166.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-90166",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": null
  },
  "source_id": "core-osv",
  "document_id": 502145,
  "published_at": "2026-09-17T16:06:55.863+00:00"
}