CVE-2025-40318

Bluetooth: hci_sync: fix race in hci_cmd_sync_dequeue_once

State: Published
Severity: 8.8 High
Published: Dec 8, 2025
Updated: Oct 15, 2026
Reserved: Apr 16, 2025

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.

Scores

CVSS	Score	Vector	Source
3.1	8.8 High	CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H	Linux

Weaknesses

The record names no weakness.

Affected Products

Product	Versions
LinuxLinux	f00f36db76eb8fd10d13e80e2590f23b5beaa54d to before 0a94f7e017438935c09ef833a1aa908ad9875213Affected 1499f79995c7ee58e3bfeeff75f6d1b37dcda881 to before 932c0a4f77ac13e526fdd5b42914d29c9821d389Affected 505ea2b295929e7be2b4e1bc86ee31cb7862fb01 to before ae76cf6c2c842944c6514c57df54d728f1916553Affected 505ea2b295929e7be2b4e1bc86ee31cb7862fb01 to before 9cd536970192b72257afcdfba0bfc09993e6f19cAffected 505ea2b295929e7be2b4e1bc86ee31cb7862fb01 to before 09b0cd1297b4dbfe736aeaa0ceeab2265f47f772Affected 357603f4d396d85fbf0045512efaf1d7f7394ed7Affected 6.1.120 to before 6.1.159Affected 6.6.51 to before 6.6.117Affected 6.8.9 to before 6.9Affected
LinuxLinux	6.9Affected before 6.9Not affected 6.1.159 through 6.1.Not affected 6.6.117 through 6.6.Not affected 6.12.58 through 6.12.Not affected 6.17.8 through 6.17.Not affected 6.18 and laterNot affected

Product

Versions

LinuxLinux

f00f36db76eb8fd10d13e80e2590f23b5beaa54d to before 0a94f7e017438935c09ef833a1aa908ad9875213Affected
1499f79995c7ee58e3bfeeff75f6d1b37dcda881 to before 932c0a4f77ac13e526fdd5b42914d29c9821d389Affected
505ea2b295929e7be2b4e1bc86ee31cb7862fb01 to before ae76cf6c2c842944c6514c57df54d728f1916553Affected
505ea2b295929e7be2b4e1bc86ee31cb7862fb01 to before 9cd536970192b72257afcdfba0bfc09993e6f19cAffected
505ea2b295929e7be2b4e1bc86ee31cb7862fb01 to before 09b0cd1297b4dbfe736aeaa0ceeab2265f47f772Affected
357603f4d396d85fbf0045512efaf1d7f7394ed7Affected
6.1.120 to before 6.1.159Affected
6.6.51 to before 6.6.117Affected
6.8.9 to before 6.9Affected

LinuxLinux

6.9Affected
before 6.9Not affected
6.1.159 through 6.1.*Not affected
6.6.117 through 6.6.*Not affected
6.12.58 through 6.12.*Not affected
6.17.8 through 6.17.*Not affected
6.18 and laterNot affected

References

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