CVE-2024-41063: Linux Kernel

Medium severity, CVSS 5.5. EPSS: 0.2% chance of exploitation in the next 30 days.

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

• Linux Linux Kernel: before 4.19.319 (fixed in 4.19.319); from 4.20, before 5.4.281 (fixed in 5.4.281); from 5.5, before 5.10.223 (fixed in 5.10.223); from 5.11, before 5.15.164 (fixed in 5.15.164); from 5.16, before 6.1.101 (fixed in 6.1.101); from 6.2, before 6.6.42 (fixed in 6.6.42); …

Published 2024-07-29. Last modified 2026-06-17.