CVE-2024-56591: Bluetooth: hci_conn: Use disable_delayed_work_sync

Severity: medium (CVSS 5.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.3% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2024-12-27 · updated 2026-08-04

Description

In the Linux kernel, the following vulnerability has been resolved: Bluetooth: hci_conn: Use disable_delayed_work_sync This makes use of disable_delayed_work_sync instead cancel_delayed_work_sync as it not only cancel the ongoing work but also disables new submit which is disarable since the object holding the work is about to be freed.

Affected products

Linux kernel: before 6.12.5 — fixed in 6.12.5

How to fix

Upgrade to a fixed version: Linux kernel 6.12.5. Check the vendor advisory for mitigations.

References

https://git.kernel.org/stable/c/2b0f2fc9ed62e73c95df1fa8ed2ba3dac54699df
https://git.kernel.org/stable/c/c55a4c5a04bae40dcdc1e1c19d8eb79a06fb3397

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