CVE-2022-48971: Bluetooth: Fix not cleanup led when bt_init fails

Severity: medium (CVSS 5.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.2% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2024-10-21 · updated 2026-06-17

Description

In the Linux kernel, the following vulnerability has been resolved: Bluetooth: Fix not cleanup led when bt_init fails bt_init() calls bt_leds_init() to register led, but if it fails later, bt_leds_cleanup() is not called to unregister it. This can cause panic if the argument "bluetooth-power" in text is freed and then another led_trigger_register() tries to access it: BUG: unable to handle page fault for address: ffffffffc06d3bc0 RIP: 0010:strcmp+0xc/0x30 Call Trace: <TASK> led_trigger_register+0x10d/0x4f0 led_trigger_register_simple+0x7d/0x100 bt_init+0x39/0xf7 [bluetooth] do_one_initcall+0xd0/0x4e0

Affected products

Linux kernel: from 4.9 before 4.19.269; from 4.20 before 5.4.227; from 5.5 before 5.10.159; from 5.11 before 5.15.83; from 5.16 before 6.0.13; 6.1-rc1, 6.1-rc2, 6.1-rc3, 6.1-rc4, 6.1-rc5, 6.1-rc6 (+2) — fixed in 4.19.269, 5.10.159, 5.15.83, 5.4.227, 6.0.13

How to fix

Upgrade to a fixed version: Linux kernel 4.19.269, 5.10.159, 5.15.83, 5.4.227. Check the vendor advisory for mitigations.

References

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