Bluetooth: avoid hci_dev_test_and_set_flag() in mgmt_init_hdev()

{
  "id": "140af278feb669f7d33b65ed0bdf40ed0cf11c29878232f6579a1204cf4bc49a",
  "url": "https://osv.dev/vulnerability/CVE-2022-50339",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "Bluetooth: avoid hci_dev_test_and_set_flag() in mgmt_init_hdev()",
    "summary": "In the Linux kernel, the following vulnerability has been resolved: Bluetooth: avoid hci_dev_test_and_set_flag() in mgmt_init_hdev() syzbot is again reporting attempt to cancel uninitialized work at mgmt_index_removed() [1], for setting of HCI_MGMT flag from mgmt_init_hdev() from hci_mgmt_cmd() from hci_sock_sendmsg() can race with testing of HCI_MGMT flag from mgmt_index_removed() from hci_sock_bind() due to lack of serialization via hci_dev_lock(). Since mgmt_init_hdev() is called with mgmt_chan_list_lock held, we can safely split hci_dev_test_and_set_flag() into hci_dev_test_flag() and hci_dev_set_flag(). Thus, in order to close this race, set HCI_MGMT flag after INIT_DELAYED_WORK() completed. This is a local fix based on mgmt_chan_list_lock. Lack of serialization via hci_dev_lock() might be causing different race conditions somewhere else. But a global fix based on hci_dev_lock() should deserve a future patch.",
    "evidence": "osv:CVE-2022-50339",
    "products": [
      {
        "name": {
          "value": "Kernel",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "6.0.3",
            "evidence": "/affected/1/ranges"
          }
        ],
        "affected_versions": []
      }
    ],
    "severity": "high",
    "structured": {
      "id": "CVE-2022-50339",
      "aliases": [
        "CVE-2022-50339"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:L/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": [
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                  "introduced": "3f2893d3c142986aa935821460cb3adb77044722"
                },
                {
                  "fixed": "e53c6180db8dd09de94e0a3bdf4fef6f5f9dd6e6"
                },
                {
                  "fixed": "f74ca25d6d6629ffd4fd80a1a73037253b57d06b"
                }
              ]
            }
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2022-50339.json"
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.0.0"
                },
                {
                  "fixed": "6.0.3"
                }
              ]
            }
          ],
          "package": {
            "name": "Kernel",
            "ecosystem": "Linux"
          },
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2022-50339.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:40.350979031Z",
      "provider": "osv",
      "references": [
        "https://git.kernel.org/stable/c/e53c6180db8dd09de94e0a3bdf4fef6f5f9dd6e6",
        "https://git.kernel.org/stable/c/f74ca25d6d6629ffd4fd80a1a73037253b57d06b",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/50xxx/CVE-2022-50339.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2022-50339",
        "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/2022/50xxx/CVE-2022-50339.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2022-50339",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 507843,
  "published_at": "2025-09-16T16:11:19.138+00:00"
}