vulnerability
Red Hat: CVE-2025-40318: kernel: Bluetooth: hci_sync: fix race in hci_cmd_sync_dequeue_once (Multiple Advisories)
| Severity | CVSS | Published | Added | Modified |
|---|---|---|---|---|
| 7 | (AV:L/AC:M/Au:S/C:C/I:C/A:C) | Dec 8, 2025 | Jan 27, 2026 | Feb 4, 2026 |
Severity
7
CVSS
(AV:L/AC:M/Au:S/C:C/I:C/A:C)
Published
Dec 8, 2025
Added
Jan 27, 2026
Modified
Feb 4, 2026
Description
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.
Solutions
redhat-upgrade-kernelredhat-upgrade-kernel-rt
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