CVE-2025-40284

Bluetooth: MGMT: cancel mesh send timer when hdev removed

State: Published
Severity: 7.8 High
Published: Dec 6, 2025
Updated: Oct 15, 2026
Reserved: Apr 16, 2025

Read the record on cve.org

Description

In the Linux kernel, the following vulnerability has been resolved:

Bluetooth: MGMT: cancel mesh send timer when hdev removed

mesh_send_done timer is not canceled when hdev is removed, which causes crash if the timer triggers after hdev is gone.

Cancel the timer when MGMT removes the hdev, like other MGMT timers.

Should fix the BUG: sporadically seen by BlueZ test bot (in "Mesh - Send cancel - 1" test).

Log: ------ BUG: KASAN: slab-use-after-free in run_timer_softirq+0x76b/0x7d0 ... Freed by task 36: kasan_save_stack+0x24/0x50 kasan_save_track+0x14/0x30 __kasan_save_free_info+0x3a/0x60 __kasan_slab_free+0x43/0x70 kfree+0x103/0x500 device_release+0x9a/0x210 kobject_put+0x100/0x1e0 vhci_release+0x18b/0x240 ------

Scores

CVSS	Score	Vector	Source
3.1	7.8 High	CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H	Linux

Weaknesses

The record names no weakness.

Affected Products

Product	Versions
LinuxLinux	b338d91703fae6f6afd67f3f75caa3b8f36ddef3 to before 990e6143b0ca0c66f099d67d00c112bf59b30d76Affected b338d91703fae6f6afd67f3f75caa3b8f36ddef3 to before 2927ff643607eddf4f03d10ef80fe10d977154aaAffected b338d91703fae6f6afd67f3f75caa3b8f36ddef3 to before 7b6b6c077cad0601d62c3c34ab7ce3fb25deda7bAffected b338d91703fae6f6afd67f3f75caa3b8f36ddef3 to before fd62ca5ad136dcf6f5aa308423b299a6be6f54eaAffected b338d91703fae6f6afd67f3f75caa3b8f36ddef3 to before 55fb52ffdd62850d667ebed842815e072d3c9961Affected
LinuxLinux	6.1Affected before 6.1Not affected 6.1.159 through 6.1.Not affected 6.6.117 through 6.6.Not affected 6.12.59 through 6.12.Not affected 6.17.9 through 6.17.Not affected 6.18 and laterNot affected

Product

Versions

LinuxLinux

b338d91703fae6f6afd67f3f75caa3b8f36ddef3 to before 990e6143b0ca0c66f099d67d00c112bf59b30d76Affected
b338d91703fae6f6afd67f3f75caa3b8f36ddef3 to before 2927ff643607eddf4f03d10ef80fe10d977154aaAffected
b338d91703fae6f6afd67f3f75caa3b8f36ddef3 to before 7b6b6c077cad0601d62c3c34ab7ce3fb25deda7bAffected
b338d91703fae6f6afd67f3f75caa3b8f36ddef3 to before fd62ca5ad136dcf6f5aa308423b299a6be6f54eaAffected
b338d91703fae6f6afd67f3f75caa3b8f36ddef3 to before 55fb52ffdd62850d667ebed842815e072d3c9961Affected

LinuxLinux

6.1Affected
before 6.1Not affected
6.1.159 through 6.1.*Not affected
6.6.117 through 6.6.*Not affected
6.12.59 through 6.12.*Not affected
6.17.9 through 6.17.*Not affected
6.18 and laterNot affected

References

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