CVE-2022-50833
Bluetooth: use hdev->workqueue when queuing hdev->{cmd,ncmd}_timer works
- Published
- Updated
- Reserved
- Assigned by
- Linux
Description
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.
Scores
No CVSS score yet: neither the CNA, CISA nor NVD has scored this CVE. NVD status: Deferred.
- EPSS (exploitation in 30 days)
- 0.24% · top 85% of all CVEs (6 Nov 2026)
The list uses the assigner's score when there is one, then CISA's, then NVD's: Not scored.
Affected products
- affected 3b382555706558f5c0587862b6dc03e96a252bba – < c4635cf3d845a7324c25c52d549b70c8bd7ad4c7
- affected 877afadad2dce8aae1f2aad8ce47e072d4f6165e – < 3c6b036fe5c8ed8b6c4cbdc03605929882907ef0
- affected 877afadad2dce8aae1f2aad8ce47e072d4f6165e – < deee93d13d385103205879a8a0915036ecd83261
- affected 4bf367fa1fefabdf14938d0ac9ed60020389112e
- affected 5.19.2 – < 5.19.15
- affected 5.18.18 – < 5.19
- affected 6.0
- unaffected < 6.0
- unaffected 5.19.15 – ≤ 5.19.*
- unaffected 6.0.1 – ≤ 6.0.*
- unaffected 6.1 – ≤ *
References (3)
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
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[](https://trackcve.app/cve/CVE-2022-50833)Record last updated .