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Unrated severityNVD Advisory· Published Jul 29, 2024· Updated Jan 5, 2026

Bluetooth: hci_core: cancel all works upon hci_unregister_dev()

CVE-2024-41063

Description

In the Linux kernel, the following vulnerability has been resolved:

Bluetooth: hci_core: cancel all works upon hci_unregister_dev()

syzbot is reporting that calling hci_release_dev() from hci_error_reset() due to hci_dev_put() from hci_error_reset() can cause deadlock at destroy_workqueue(), for hci_error_reset() is called from hdev->req_workqueue which destroy_workqueue() needs to flush.

We need to make sure that hdev->{rx_work,cmd_work,tx_work} which are queued into hdev->workqueue and hdev->{power_on,error_reset} which are queued into hdev->req_workqueue are no longer running by the moment

destroy_workqueue(hdev->workqueue); destroy_workqueue(hdev->req_workqueue);

are called from hci_release_dev().

Call cancel_work_sync() on these work items from hci_unregister_dev() as soon as hdev->list is removed from hci_dev_list.

Affected products

120

Patches

8
0d151a103775
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.gitvia osv
commit
d6cbce183706
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.gitvia osv
commit
3f939bd73fed
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.gitvia osv
commit
d2ce562a5aff
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.gitvia osv
commit
96600c2e5ee8
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.gitvia osv
commit
ddeda6ca5f21
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.gitvia osv
commit
9cfc84b1d464
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.gitvia osv
commit
48542881997e
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.gitvia osv
commit

Vulnerability mechanics

Generated on May 9, 2026. Inputs: CWE entries + fix-commit diffs from this CVE's patches. Citations validated against bundle.

References

8

News mentions

0

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