CVE-2026-23101

  1. OpenCVE
  2. Vulnerabilities (CVE)
  3. CVE-2026-23101
In the Linux kernel, the following vulnerability has been resolved: leds: led-class: Only Add LED to leds_list when it is fully ready Before this change the LED was added to leds_list before led_init_core() gets called adding it the list before led_classdev.set_brightness_work gets initialized. This leaves a window where led_trigger_register() of a LED's default trigger will call led_trigger_set() which calls led_set_brightness() which in turn will end up queueing the *uninitialized* led_classdev.set_brightness_work. This race gets hit by the lenovo-thinkpad-t14s EC driver which registers 2 LEDs with a default trigger provided by snd_ctl_led.ko in quick succession. The first led_classdev_register() causes an async modprobe of snd_ctl_led to run and that async modprobe manages to exactly hit the window where the second LED is on the leds_list without led_init_core() being called for it, resulting in: ------------[ cut here ]------------ WARNING: CPU: 11 PID: 5608 at kernel/workqueue.c:4234 __flush_work+0x344/0x390 Hardware name: LENOVO 21N2S01F0B/21N2S01F0B, BIOS N42ET93W (2.23 ) 09/01/2025 ... Call trace: __flush_work+0x344/0x390 (P) flush_work+0x2c/0x50 led_trigger_set+0x1c8/0x340 led_trigger_register+0x17c/0x1c0 led_trigger_register_simple+0x84/0xe8 snd_ctl_led_init+0x40/0xf88 [snd_ctl_led] do_one_initcall+0x5c/0x318 do_init_module+0x9c/0x2b8 load_module+0x7e0/0x998 Close the race window by moving the adding of the LED to leds_list to after the led_init_core() call.

4.7 /10

CVSS v3 : MEDIUM

V3 Legend

Vector :

Exploitability : 1.0 / Impact : 3.6

Attack Vector LOCAL

Attack Complexity HIGH

Privileges Required LOW

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References
Link Resource
https://git.kernel.org/stable/c/2757f7748ce2d0fa44112024907bafb37e104d6e Patch
https://git.kernel.org/stable/c/78822628165f3d817382f67f91129161159ca234 Patch
https://git.kernel.org/stable/c/d117fdcb21b05c0e0460261d017b92303cd9ba77 Patch
https://git.kernel.org/stable/c/d1883cefd31752f0504b94c3bcfa1f6d511d6e87 Patch
https://git.kernel.org/stable/c/da565bf98c9ad0eabcb09fc97859e0b52f98b7c3 Patch
https://git.kernel.org/stable/c/e90c861411fc84629a240384b0a72830539d3386 Patch
https://git.kernel.org/stable/c/f7a6df659af777058833802c29b3b7974db5e78a Patch
Configurations

Configuration 1 (hide)

OR cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.19:rc1:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.19:rc2:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.19:rc3:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.19:rc4:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.19:rc5:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.19:rc6:*:*:*:*:*:*
History

19 Mar 2026, 19:33

Type Values Removed Values Added
Summary
  • (es) En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta: leds: led-class: Solo añadir el LED a leds_list cuando esté completamente listo Antes de este cambio, el LED se añadía a leds_list antes de que se llamara a led_init_core(), añadiéndolo a la lista antes de que se inicializara led_classdev.set_brightness_work. Esto deja una ventana donde led_trigger_register() del disparador predeterminado de un LED llamará a led_trigger_set(), que llama a led_set_brightness(), lo que a su vez terminará encolando el led_classdev.set_brightness_work *no inicializado*. Esta condición de carrera es activada por el controlador EC de lenovo-thinkpad-t14s, que registra 2 LEDs con un disparador predeterminado proporcionado por snd_ctl_led.ko en rápida sucesión. La primera llamada a led_classdev_register() provoca la ejecución de un modprobe asíncrono de snd_ctl_led y ese modprobe asíncrono logra alcanzar exactamente la ventana donde el segundo LED está en leds_list sin que se haya llamado a led_init_core() para él, resultando en: ------------[ cut here ]------------ ADVERTENCIA: CPU: 11 PID: 5608 at kernel/workqueue.c:4234 __flush_work+0x344/0x390 Hardware name: LENOVO 21N2S01F0B/21N2S01F0B, BIOS N42ET93W (2.23 ) 09/01/2025 ... Rastreo de llamadas: __flush_work+0x344/0x390 (P) flush_work+0x2c/0x50 led_trigger_set+0x1c8/0x340 led_trigger_register+0x17c/0x1c0 led_trigger_register_simple+0x84/0xe8 snd_ctl_led_init+0x40/0xf88 [snd_ctl_led] do_one_initcall+0x5c/0x318 do_init_module+0x9c/0x2b8 load_module+0x7e0/0x998 Cerrar la ventana de la condición de carrera moviendo la adición del LED a leds_list a después de la llamada a led_init_core().
References () https://git.kernel.org/stable/c/2757f7748ce2d0fa44112024907bafb37e104d6e - () https://git.kernel.org/stable/c/2757f7748ce2d0fa44112024907bafb37e104d6e - Patch
References () https://git.kernel.org/stable/c/78822628165f3d817382f67f91129161159ca234 - () https://git.kernel.org/stable/c/78822628165f3d817382f67f91129161159ca234 - Patch
References () https://git.kernel.org/stable/c/d117fdcb21b05c0e0460261d017b92303cd9ba77 - () https://git.kernel.org/stable/c/d117fdcb21b05c0e0460261d017b92303cd9ba77 - Patch
References () https://git.kernel.org/stable/c/d1883cefd31752f0504b94c3bcfa1f6d511d6e87 - () https://git.kernel.org/stable/c/d1883cefd31752f0504b94c3bcfa1f6d511d6e87 - Patch
References () https://git.kernel.org/stable/c/da565bf98c9ad0eabcb09fc97859e0b52f98b7c3 - () https://git.kernel.org/stable/c/da565bf98c9ad0eabcb09fc97859e0b52f98b7c3 - Patch
References () https://git.kernel.org/stable/c/e90c861411fc84629a240384b0a72830539d3386 - () https://git.kernel.org/stable/c/e90c861411fc84629a240384b0a72830539d3386 - Patch
References () https://git.kernel.org/stable/c/f7a6df659af777058833802c29b3b7974db5e78a - () https://git.kernel.org/stable/c/f7a6df659af777058833802c29b3b7974db5e78a - Patch
CPE cpe:2.3:o:linux:linux_kernel:6.19:rc5:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.19:rc4:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.19:rc1:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.19:rc2:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.19:rc6:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.19:rc3:*:*:*:*:*:*
CWE CWE-908
First Time Linux
Linux linux Kernel
CVSS v2 : unknown
v3 : unknown 		v2 : unknown
v3 : 4.7

06 Feb 2026, 17:16

Type Values Removed Values Added
References
  • () https://git.kernel.org/stable/c/d117fdcb21b05c0e0460261d017b92303cd9ba77 -
  • () https://git.kernel.org/stable/c/e90c861411fc84629a240384b0a72830539d3386 -
  • () https://git.kernel.org/stable/c/f7a6df659af777058833802c29b3b7974db5e78a -

04 Feb 2026, 17:16

Type Values Removed Values Added
New CVE
Information

Published : 2026-02-04 17:16

Updated : 2026-03-19 19:33

NVD link : CVE-2026-23101

Mitre link : CVE-2026-23101

CVE.ORG link : CVE-2026-23101

JSON object : View

Products Affected

linux

  • linux_kernel
CWE
CWE-908

Use of Uninitialized Resource