Bug 2419920 (CVE-2025-40318) - CVE-2025-40318 kernel: Bluetooth: hci_sync: fix race in hci_cmd_sync_dequeue_once
Summary: CVE-2025-40318 kernel: Bluetooth: hci_sync: fix race in hci_cmd_sync_dequeue_...
Keywords:
Status: NEW
Alias: CVE-2025-40318
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Product Security DevOps Team
QA Contact:
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2025-12-08 07:08 UTC by OSIDB Bzimport
Modified: 2026-01-26 14:09 UTC (History)
0 users

Fixed In Version:
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System ID Private Priority Status Summary Last Updated
Red Hat Product Errata RHSA-2026:1194 0 None None None 2026-01-26 14:09:56 UTC

Description OSIDB Bzimport 2025-12-08 07:08:48 UTC 
In the Linux kernel, the following vulnerability has been resolved:

Bluetooth: hci_sync: fix race in hci_cmd_sync_dequeue_once

hci_cmd_sync_dequeue_once() does lookup and then cancel
the entry under two separate lock sections. Meanwhile,
hci_cmd_sync_work() can also delete the same entry,
leading to double list_del() and "UAF".

Fix this by holding cmd_sync_work_lock across both
lookup and cancel, so that the entry cannot be removed
concurrently.
Comment 1 Jon Moroney 2025-12-08 19:40:05 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2025120823-CVE-2025-40318-0f27@gregkh/T
Comment 4 errata-xmlrpc 2026-01-26 14:09:55 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9.6 Extended Update Support

Via RHSA-2026:1194 https://access.redhat.com/errata/RHSA-2026:1194
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