Improper Locking Affecting kernel-uek-debug-modules-extra package, versions <0:5.15.0-302.167.6.el9uek


Severity

Recommended
high

Based on Oracle Linux security rating.

Threat Intelligence

EPSS
0.04% (6th percentile)

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  • Snyk IDSNYK-ORACLE9-KERNELUEKDEBUGMODULESEXTRA-8376529
  • published14 Nov 2024
  • disclosed29 Jul 2024

Introduced: 29 Jul 2024

CVE-2024-41063  (opens in a new tab)
CWE-667  (opens in a new tab)

How to fix?

Upgrade Oracle:9 kernel-uek-debug-modules-extra to version 0:5.15.0-302.167.6.el9uek or higher.
This issue was patched in ELSA-2024-12815.

NVD Description

Note: Versions mentioned in the description apply only to the upstream kernel-uek-debug-modules-extra package and not the kernel-uek-debug-modules-extra package as distributed by Oracle. See How to fix? for Oracle:9 relevant fixed versions and status.

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-&gt;workqueue);
   destroy_workqueue(hdev-&gt;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.

CVSS Scores

version 3.1