CVE-2025-23144 backlight: led_bl: Hold led_access lock when calling led_sysfs_disable()
A missing lock in the Linux kernel LED backlight driver can cause a race condition leading to a system crash during device removal.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2025-23144?
CVE-2025-23144 is a medium-severity vulnerability in Debian Debian Linux, published on 1 May 2025. It can only be exploited from the same machine or local network, with no action from the victim.
Official 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().
Which versions are affected by CVE-2025-23144?
It affects 2 products.
Products include Debian Debian Linux, Linux kernel.
How do I fix CVE-2025-23144?
Apply the vendor's patch.
Is CVE-2025-23144 being exploited?
There is no known exploitation of CVE-2025-23144 in the wild and no public exploit code.
Other vulnerabilities in Debian Debian Linux
Sources
Also known as BELL-CVE-2025-23144, DEBIAN-CVE-2025-23144, GHSA-3cfh-wr8w-8mhf, ROOT-OS-DEBIAN-12-CVE-2025-23144, ROOT-OS-UBUNTU-2204-CVE-2025-23144, ROOT-OS-UBUNTU-2404-CVE-2025-23144 and 1 more.