Medium 4.7Published Feb 4, 2026

CVE-2026-23101leds: led-class: Only Add LED to leds_list when it is fully ready

Updated under an hour ago (Oct 27, 2026, 1:40 AM ET)

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Exploited in the last 30 days

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.

CVSS: 4.7 MEDIUM (v3.1, NVD)CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H
Weakness (CWE): CWE-362
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: Linux
NVD analysis: Modified
Record last updated: Oct 19, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

Linux Linux linux:linux (from the name)	from d23a22a74fded23a12434c9463fe66cec2b0afcd before f7a6df659af777058833802c29b3b7974db5e78a; from d23a22a74fded23a12434c9463fe66cec2b0afcd before d117fdcb21b05c0e0460261d017b92303cd9ba77; from d23a22a74fded23a12434c9463fe66cec2b0afcd before e90c861411fc84629a240384b0a72830539d3386; from d23a22a74fded23a12434c9463fe66cec2b0afcd before 2757f7748ce2d0fa44112024907bafb37e104d6e; from d23a22a74fded23a12434c9463fe66cec2b0afcd before da565bf98c9ad0eabcb09fc97859e0b52f98b7c3; from d23a22a74fded23a12434c9463fe66cec2b0afcd before 78822628165f3d817382f67f91129161159ca234; from d23a22a74fded23a12434c9463fe66cec2b0afcd before d1883cefd31752f0504b94c3bcfa1f6d511d6e87	CNA record
linux linux_kernel linux:linux_kernel	from 3.7 before 5.10.249; from 5.11 before 5.15.199; from 5.16 before 6.1.162; from 6.2 before 6.6.122; from 6.7 before 6.12.68; from 6.13 before 6.18.8; 6.19; 6.19; and 4 more ranges	NVD

References

References

https://git.kernel.org/stable/c/f7a6df659af777058833802c29b3b7974db5e78a	patch
https://git.kernel.org/stable/c/d117fdcb21b05c0e0460261d017b92303cd9ba77	patch
https://git.kernel.org/stable/c/e90c861411fc84629a240384b0a72830539d3386	patch
https://git.kernel.org/stable/c/2757f7748ce2d0fa44112024907bafb37e104d6e	patch
https://git.kernel.org/stable/c/da565bf98c9ad0eabcb09fc97859e0b52f98b7c3	patch
https://git.kernel.org/stable/c/78822628165f3d817382f67f91129161159ca234	patch
https://git.kernel.org/stable/c/d1883cefd31752f0504b94c3bcfa1f6d511d6e87	patch

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.