CVE-2022-50833 (GCVE-0-2022-50833)

Vulnerability from cvelistv5 – Published: 2025-12-30 12:10 – Updated: 2026-05-23 15:25
VLAI
Title
Bluetooth: use hdev->workqueue when queuing hdev->{cmd,ncmd}_timer works
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.
Severity
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 3b382555706558f5c0587862b6dc03e96a252bba , < c4635cf3d845a7324c25c52d549b70c8bd7ad4c7 (git)
Affected: 877afadad2dce8aae1f2aad8ce47e072d4f6165e , < 3c6b036fe5c8ed8b6c4cbdc03605929882907ef0 (git)
Affected: 877afadad2dce8aae1f2aad8ce47e072d4f6165e , < deee93d13d385103205879a8a0915036ecd83261 (git)
Affected: 4bf367fa1fefabdf14938d0ac9ed60020389112e (git)
Affected: 5.19.2 , < 5.19.15 (semver)
Affected: 5.18.18 , < 5.19 (semver)
guessed Create a notification for this product.
Linux Linux Affected: 6.0
Unaffected: 0 , < 6.0 (semver)
Unaffected: 5.19.15 , ≤ 5.19.* (semver)
Unaffected: 6.0.1 , ≤ 6.0.* (semver)
Unaffected: 6.1 , ≤ * (original_commit_for_fix)
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{
  "containers": {
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        {
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          "product": "Linux",
          "programFiles": [
            "net/bluetooth/hci_core.c",
            "net/bluetooth/hci_event.c"
          ],
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              "versionType": "git"
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              "operator": "OR"
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          "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": "2026-05-23T15:25:18.248Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
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        },
        {
          "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"
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  "cveMetadata": {
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    "assignerShortName": "Linux",
    "cveId": "CVE-2022-50833",
    "datePublished": "2025-12-30T12:10:54.342Z",
    "dateReserved": "2025-12-30T12:06:07.132Z",
    "dateUpdated": "2026-05-23T15:25:18.248Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
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      "date": "2026-09-25",
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      "percentile": "0.12944"
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        "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."
          }
        ],
        "id": "CVE-2022-50833",
        "lastModified": "2026-06-17T05:24:15.947",
        "metrics": {},
        "published": "2025-12-30T13:15:57.810",
        "references": [
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      "id": "CVE-2022-50833",
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      "source": "Red Hat CSAF VEX",
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      "title": "kernel: Bluetooth: use hdev-\u003eworkqueue when queuing hdev-\u003e{cmd,ncmd}_timer works",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2022/cve-2022-50833.json",
      "version": "3"
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      "cve": "CVE-2022-50833",
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      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2022-50833",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2022-50833.json",
      "version": "26"
    }
  }
}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

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Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.