CVE-2025-23144: backlight: led_bl: Hold led_access lock when calling led_sysfs_disable()

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: 2025-05-01 · updated 2026-06-17

Description

In the Linux kernel, the following vulnerability has been resolved: backlight: led_bl: Hold led_access lock when calling led_sysfs_disable() Lockdep detects the following issue on led-backlight removal: [ 142.315935] ------------[ cut here ]------------ [ 142.315954] WARNING: CPU: 2 PID: 292 at drivers/leds/led-core.c:455 led_sysfs_enable+0x54/0x80 ... [ 142.500725] Call trace: [ 142.503176] led_sysfs_enable+0x54/0x80 (P) [ 142.507370] led_bl_remove+0x80/0xa8 [led_bl] [ 142.511742] platform_remove+0x30/0x58 [ 142.515501] device_remove+0x54/0x90 ... Indeed, led_sysfs_enable() has to be called with the led_access lock held. Hold the lock when calling led_sysfs_disable().

Affected products

Debian Linux: 11.0
Linux kernel: from 5.6.1 before 5.10.237; from 5.11 before 5.15.181; from 5.16 before 6.1.136; from 6.2 before 6.6.88; from 6.7 before 6.12.24; from 6.13 before 6.13.12 — fixed in 5.10.237, 5.15.181, 6.1.136, 6.12.24, 6.13.12, 6.14.3

How to fix

Upgrade to a fixed version: Linux kernel 5.10.237, 5.15.181, 6.1.136, 6.12.24. Check the vendor advisory for mitigations.

References

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