CVE-2022-50833 (GCVE-0-2022-50833)
Vulnerability from cvelistv5
Published
2025-12-30 12:10
Modified
2025-12-30 12:10
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: Bluetooth: use hdev->workqueue when queuing hdev->{cmd,ncmd}_timer works syzbot is reporting attempt to schedule hdev->cmd_work work from system_wq WQ into hdev->workqueue WQ which is under draining operation [1], for commit c8efcc2589464ac7 ("workqueue: allow chained queueing during destruction") does not allow such operation. The check introduced by commit 877afadad2dce8aa ("Bluetooth: When HCI work queue is drained, only queue chained work") was incomplete. Use hdev->workqueue WQ when queuing hdev->{cmd,ncmd}_timer works because hci_{cmd,ncmd}_timeout() calls queue_work(hdev->workqueue). Also, protect the queuing operation with RCU read lock in order to avoid calling queue_delayed_work() after cancel_delayed_work() completed.
References
Impacted products
Vendor Product Version
Linux Linux Version: 3b382555706558f5c0587862b6dc03e96a252bba
Version: 877afadad2dce8aae1f2aad8ce47e072d4f6165e
Version: 877afadad2dce8aae1f2aad8ce47e072d4f6165e
Version: 4bf367fa1fefabdf14938d0ac9ed60020389112e
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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "net/bluetooth/hci_core.c",
            "net/bluetooth/hci_event.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "c4635cf3d845a7324c25c52d549b70c8bd7ad4c7",
              "status": "affected",
              "version": "3b382555706558f5c0587862b6dc03e96a252bba",
              "versionType": "git"
            },
            {
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              "status": "affected",
              "version": "877afadad2dce8aae1f2aad8ce47e072d4f6165e",
              "versionType": "git"
            },
            {
              "lessThan": "deee93d13d385103205879a8a0915036ecd83261",
              "status": "affected",
              "version": "877afadad2dce8aae1f2aad8ce47e072d4f6165e",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "4bf367fa1fefabdf14938d0ac9ed60020389112e",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "net/bluetooth/hci_core.c",
            "net/bluetooth/hci_event.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.0"
            },
            {
              "lessThan": "6.0",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.19.*",
              "status": "unaffected",
              "version": "5.19.15",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.0.*",
              "status": "unaffected",
              "version": "6.0.1",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.1",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.19.15",
                  "versionStartIncluding": "5.19.2",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.0.1",
                  "versionStartIncluding": "6.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.1",
                  "versionStartIncluding": "6.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionStartIncluding": "5.18.18",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nBluetooth: use hdev-\u003eworkqueue when queuing hdev-\u003e{cmd,ncmd}_timer works\n\nsyzbot is reporting attempt to schedule hdev-\u003ecmd_work work from system_wq\nWQ into hdev-\u003eworkqueue WQ which is under draining operation [1], for\ncommit c8efcc2589464ac7 (\"workqueue: allow chained queueing during\ndestruction\") does not allow such operation.\n\nThe check introduced by commit 877afadad2dce8aa (\"Bluetooth: When HCI work\nqueue is drained, only queue chained work\") was incomplete.\n\nUse hdev-\u003eworkqueue WQ when queuing hdev-\u003e{cmd,ncmd}_timer works because\nhci_{cmd,ncmd}_timeout() calls queue_work(hdev-\u003eworkqueue). Also, protect\nthe queuing operation with RCU read lock in order to avoid calling\nqueue_delayed_work() after cancel_delayed_work() completed."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2025-12-30T12:10:54.342Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/c4635cf3d845a7324c25c52d549b70c8bd7ad4c7"
        },
        {
          "url": "https://git.kernel.org/stable/c/3c6b036fe5c8ed8b6c4cbdc03605929882907ef0"
        },
        {
          "url": "https://git.kernel.org/stable/c/deee93d13d385103205879a8a0915036ecd83261"
        }
      ],
      "title": "Bluetooth: use hdev-\u003eworkqueue when queuing hdev-\u003e{cmd,ncmd}_timer works",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2022-50833",
    "datePublished": "2025-12-30T12:10:54.342Z",
    "dateReserved": "2025-12-30T12:06:07.132Z",
    "dateUpdated": "2025-12-30T12:10:54.342Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "nvd": "{\"cve\":{\"id\":\"CVE-2022-50833\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2025-12-30T13:15:57.810\",\"lastModified\":\"2025-12-31T20:43:05.160\",\"vulnStatus\":\"Awaiting Analysis\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nBluetooth: use hdev-\u003eworkqueue when queuing hdev-\u003e{cmd,ncmd}_timer works\\n\\nsyzbot is reporting attempt to schedule hdev-\u003ecmd_work work from system_wq\\nWQ into hdev-\u003eworkqueue WQ which is under draining operation [1], for\\ncommit c8efcc2589464ac7 (\\\"workqueue: allow chained queueing during\\ndestruction\\\") does not allow such operation.\\n\\nThe check introduced by commit 877afadad2dce8aa (\\\"Bluetooth: When HCI work\\nqueue is drained, only queue chained work\\\") was incomplete.\\n\\nUse hdev-\u003eworkqueue WQ when queuing hdev-\u003e{cmd,ncmd}_timer works because\\nhci_{cmd,ncmd}_timeout() calls queue_work(hdev-\u003eworkqueue). Also, protect\\nthe queuing operation with RCU read lock in order to avoid calling\\nqueue_delayed_work() after cancel_delayed_work() completed.\"}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/3c6b036fe5c8ed8b6c4cbdc03605929882907ef0\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/c4635cf3d845a7324c25c52d549b70c8bd7ad4c7\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/deee93d13d385103205879a8a0915036ecd83261\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}"
  }
}


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