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

Q: What is the severity of CVE-2026-23101?

CVE-2026-23101 is classified as a moderate severity vulnerability in the Linux kernel.

Q: How do I fix CVE-2026-23101?

To fix CVE-2026-23101, update to the latest version of the Linux kernel that includes the patch addressing this vulnerability.

Q: What does CVE-2026-23101 affect?

CVE-2026-23101 affects the led-class subsystem of the Linux kernel.

Q: What is the impact of CVE-2026-23101?

CVE-2026-23101 could lead to potential stability issues with the LED functionality in the Linux kernel.

Q: When was CVE-2026-23101 published?

CVE-2026-23101 was published as part of the ongoing security updates for the Linux kernel.

Published Feb 4, 2026

Updated

In the Linux kernel, the following vulnerability has been resolved:

leds: led-class: Only Add LED to ledslist when it is fully ready

Before this change the LED was added to ledslist before ledinitcore() gets called adding it the list before ledclassdev.setbrightnesswork gets initialized.

This leaves a window where ledtriggerregister() of a LED's default trigger will call ledtriggerset() which calls ledsetbrightness() which in turn will end up queueing the uninitialized ledclassdev.setbrightnesswork.

This race gets hit by the lenovo-thinkpad-t14s EC driver which registers 2 LEDs with a default trigger provided by sndctlled.ko in quick succession. The first ledclassdevregister() causes an async modprobe of sndctlled to run and that async modprobe manages to exactly hit the window where the second LED is on the ledslist without ledinitcore() being called for it, resulting in:

------------[ cut here ]------------ WARNING: CPU: 11 PID: 5608 at kernel/workqueue.c:4234 flushwork+0x344/0x390 Hardware name: LENOVO 21N2S01F0B/21N2S01F0B, BIOS N42ET93W (2.23 ) 09/01/2025 ... Call trace: flushwork+0x344/0x390 (P) flushwork+0x2c/0x50 ledtriggerset+0x1c8/0x340 ledtriggerregister+0x17c/0x1c0 ledtriggerregistersimple+0x84/0xe8 sndctlledinit+0x40/0xf88 [sndctlled] dooneinitcall+0x5c/0x318 doinitmodule+0x9c/0x2b8 loadmodule+0x7e0/0x998

Close the race window by moving the adding of the LED to ledslist to after the ledinitcore() call.

Affected Software

255 affected componentsFixes available

linux/kernel

Linux Linux kernel>=3.7<5.10.249

Linux Linux kernel>=5.11<5.15.199

Linux Linux kernel>=5.16<6.1.162

Linux Linux kernel>=6.2<6.6.122

Linux Linux kernel>=6.7<6.12.68

Linux Linux kernel>=6.13<6.18.8

Linux Linux kernel=6.19-rc1

Linux Linux kernel=6.19-rc2

Linux Linux kernel=6.19-rc3

Linux Linux kernel=6.19-rc4

Linux Linux kernel=6.19-rc5

Linux Linux kernel=6.19-rc6

ubuntu/linux*

ubuntu/linux-aws*

ubuntu/linux-azure*

ubuntu/linux-lts-xenial*

ubuntu/linux*

ubuntu/linux-aws*

ubuntu/linux-aws-hwe*

ubuntu/linux-azure*

ubuntu/linux-gcp*

ubuntu/linux-hwe*

ubuntu/linux-hwe-edge*

ubuntu/linux-kvm*

ubuntu/linux-oracle*

ubuntu/linux-fips*

ubuntu/linux*

ubuntu/linux-aws*

ubuntu/linux-aws-5.0*

ubuntu/linux-aws-5.3*

ubuntu/linux-aws-5.4*

ubuntu/linux-azure*

ubuntu/linux-azure-4.15*

ubuntu/linux-azure-5.3*

ubuntu/linux-azure-5.4*

ubuntu/linux-azure-edge*

ubuntu/linux-gcp*

ubuntu/linux-gcp-4.15*

ubuntu/linux-gcp-5.3*

ubuntu/linux-gcp-5.4*

ubuntu/linux-gke-4.15*

ubuntu/linux-gke-5.4*

ubuntu/linux-gkeop-5.4*

ubuntu/linux-hwe*

ubuntu/linux-hwe-5.4*

ubuntu/linux-hwe-edge*

ubuntu/linux-ibm-5.4*

ubuntu/linux-kvm*

ubuntu/linux-oem*

ubuntu/linux-oracle*

ubuntu/linux-oracle-5.0*

ubuntu/linux-oracle-5.3*

ubuntu/linux-oracle-5.4*

ubuntu/linux-raspi-5.4*

ubuntu/linux-aws-fips*

ubuntu/linux-azure-fips*

ubuntu/linux-fips*

ubuntu/linux-gcp-fips*

ubuntu/linux-aws-fips*

ubuntu/linux-azure-fips*

ubuntu/linux-fips*

ubuntu/linux-gcp-fips*

ubuntu/linux*

ubuntu/linux-aws*

ubuntu/linux-aws-5.11*

ubuntu/linux-aws-5.13*

ubuntu/linux-aws-5.15<5.15.0-1105.112~20.04.1

5.15.0-1105.112~20.04.1

ubuntu/linux-aws-5.8*

ubuntu/linux-azure*

ubuntu/linux-azure-5.11*

ubuntu/linux-azure-5.13*

ubuntu/linux-azure-5.15<5.15.0-1110.119~20.04.1

5.15.0-1110.119~20.04.1

ubuntu/linux-azure-5.8*

ubuntu/linux-azure-fde*

ubuntu/linux-bluefield*

ubuntu/linux-gcp*

ubuntu/linux-gcp-5.11*

ubuntu/linux-gcp-5.13*

ubuntu/linux-gcp-5.15<5.15.0-1106.115~20.04.1

5.15.0-1106.115~20.04.1

ubuntu/linux-gcp-5.8*

ubuntu/linux-gke*

ubuntu/linux-gke-5.15*

ubuntu/linux-gkeop*

ubuntu/linux-gkeop-5.15*

ubuntu/linux-hwe-5.11*

ubuntu/linux-hwe-5.13*

ubuntu/linux-hwe-5.15<5.15.0-176.186~20.04.1

5.15.0-176.186~20.04.1

ubuntu/linux-hwe-5.8*

ubuntu/linux-ibm*

ubuntu/linux-ibm-5.15<5.15.0-1099.102~20.04.1

5.15.0-1099.102~20.04.1

ubuntu/linux-intel-5.13*

ubuntu/linux-intel-iotg-5.15<5.15.0-1100.106~20.04.1

5.15.0-1100.106~20.04.1

ubuntu/linux-iot*

ubuntu/linux-kvm*

ubuntu/linux-lowlatency-hwe-5.15<5.15.0-175.185~20.04.1

5.15.0-175.185~20.04.1

ubuntu/linux-nvidia-tegra-5.15<5.15.0-1057.57~20.04.1

5.15.0-1057.57~20.04.1

ubuntu/linux-oem-5.10*

ubuntu/linux-oem-5.13*

ubuntu/linux-oem-5.6*

ubuntu/linux-oracle*

ubuntu/linux-oracle-5.11*

ubuntu/linux-oracle-5.13*

ubuntu/linux-oracle-5.15<5.15.0-1102.108~20.04.1

5.15.0-1102.108~20.04.1

ubuntu/linux-oracle-5.8*

ubuntu/linux-raspi*

ubuntu/linux-raspi2*

ubuntu/linux-riscv*

ubuntu/linux-riscv-5.11*

ubuntu/linux-riscv-5.15<5.15.0-1099.103~20.04.1

5.15.0-1099.103~20.04.1

ubuntu/linux-riscv-5.8*

ubuntu/linux-xilinx-zynqmp*

ubuntu/linux-aws-fips*

ubuntu/linux-azure-fips*

ubuntu/linux-fips*

ubuntu/linux-gcp-fips*

ubuntu/linux-aws-fips*

ubuntu/linux-azure-fips*

ubuntu/linux-fips*

ubuntu/linux-gcp-fips*

ubuntu/linux<5.15.0-176.186

5.15.0-176.186

ubuntu/linux-allwinner-5.19*

ubuntu/linux-aws<5.15.0-1105.112

5.15.0-1105.112

ubuntu/linux-aws-5.19*

ubuntu/linux-aws-6.2*

ubuntu/linux-aws-6.5*

ubuntu/linux-aws-6.8<6.8.0-1057.60~22.04.1

6.8.0-1057.60~22.04.1

ubuntu/linux-azure<5.15.0-1110.119

5.15.0-1110.119

ubuntu/linux-azure-5.19*

ubuntu/linux-azure-6.2*

ubuntu/linux-azure-6.5*

ubuntu/linux-azure-6.8<6.8.0-1059.65~22.04.1

6.8.0-1059.65~22.04.1

ubuntu/linux-azure-fde<5.15.0-1114.123

5.15.0-1114.123

ubuntu/linux-azure-fde-5.19*

ubuntu/linux-azure-fde-6.2*

ubuntu/linux-azure-fde-6.8<6.8.0-1058.65~22.04.1

6.8.0-1058.65~22.04.1

ubuntu/linux-gcp<5.15.0-1105.114

5.15.0-1105.114

ubuntu/linux-gcp-5.19*

ubuntu/linux-gcp-6.2*

ubuntu/linux-gcp-6.5*

ubuntu/linux-gcp-6.8<6.8.0-1060.63~22.04.1

6.8.0-1060.63~22.04.1

ubuntu/linux-gke<5.15.0-1101.107

5.15.0-1101.107

ubuntu/linux-gkeop<5.15.0-1088.96

5.15.0-1088.96

ubuntu/linux-hwe-5.19*

ubuntu/linux-hwe-6.2*

ubuntu/linux-hwe-6.5*

ubuntu/linux-hwe-6.8<6.8.0-124.124~22.04.1

6.8.0-124.124~22.04.1

ubuntu/linux-ibm<5.15.0-1099.102

5.15.0-1099.102

ubuntu/linux-ibm-6.8<6.8.0-1055.56~22.04.1

6.8.0-1055.56~22.04.1

ubuntu/linux-intel-iot-realtime*

ubuntu/linux-intel-iotg<5.15.0-1100.106

5.15.0-1100.106

ubuntu/linux-kvm<5.15.0-1097.102

5.15.0-1097.102

ubuntu/linux-lowlatency<5.15.0-175.185

5.15.0-175.185

ubuntu/linux-lowlatency-hwe-5.19*

ubuntu/linux-lowlatency-hwe-6.2*

ubuntu/linux-lowlatency-hwe-6.5*

ubuntu/linux-lowlatency-hwe-6.8<6.8.0-117.117.1~22.04.1

6.8.0-117.117.1~22.04.1

ubuntu/linux-nvidia<5.15.0-1100.101

5.15.0-1100.101

ubuntu/linux-nvidia-6.2*

ubuntu/linux-nvidia-6.5*

ubuntu/linux-nvidia-6.8<6.8.0-1054.57~22.04.1

6.8.0-1054.57~22.04.1

ubuntu/linux-nvidia-tegra<5.15.0-1057.57

5.15.0-1057.57

ubuntu/linux-nvidia-tegra-igx<5.15.0-1046.46

5.15.0-1046.46

ubuntu/linux-oem-5.17*

ubuntu/linux-oem-6.0*

ubuntu/linux-oem-6.1*

ubuntu/linux-oem-6.5*

ubuntu/linux-oracle<5.15.0-1102.108

5.15.0-1102.108

ubuntu/linux-oracle-6.5*

ubuntu/linux-oracle-6.8<6.8.0-1054.55~22.04.1

6.8.0-1054.55~22.04.1

ubuntu/linux-raspi<5.15.0-1099.102

5.15.0-1099.102

ubuntu/linux-realtime*

ubuntu/linux-riscv*

ubuntu/linux-riscv-5.19*

ubuntu/linux-riscv-6.5*

ubuntu/linux-riscv-6.8<6.8.0-117.117~22.04.1

6.8.0-117.117~22.04.1

ubuntu/linux-starfive-5.19*

ubuntu/linux-starfive-6.2*

ubuntu/linux-starfive-6.5*

ubuntu/linux-xilinx-zynqmp<5.15.0-1070.74

5.15.0-1070.74

ubuntu/linux-bluefield<5.15.0-1089.91

5.15.0-1089.91

ubuntu/linux-intel-iot-realtime<5.15.0-1097.99

5.15.0-1097.99

ubuntu/linux-realtime<5.15.0-1104.113

5.15.0-1104.113

ubuntu/linux-realtime-6.8<6.8.1-1051.52~22.04.1

6.8.1-1051.52~22.04.1

ubuntu/linux-aws-fips*

ubuntu/linux-azure-fips*

ubuntu/linux-fips*

ubuntu/linux-gcp-fips*

ubuntu/linux-aws-fips<5.15.0-1105.112+fips1

5.15.0-1105.112+fips1

ubuntu/linux-azure-fips<5.15.0-1110.119+fips1

5.15.0-1110.119+fips1

ubuntu/linux-fips<5.15.0-176.186+fips1

5.15.0-176.186+fips1

ubuntu/linux-gcp-fips<5.15.0-1105.114+fips1

5.15.0-1105.114+fips1

ubuntu/linux<6.8.0-117.117

6.8.0-117.117

ubuntu/linux-aws<6.8.0-1055.58

6.8.0-1055.58

ubuntu/linux-aws-6.14*

ubuntu/linux-aws-6.17*

ubuntu/linux-azure<6.8.0-1056.62

6.8.0-1056.62

ubuntu/linux-azure-6.11*

ubuntu/linux-azure-6.14*

ubuntu/linux-azure-6.17<6.17.0-1021.21~24.04.1

6.17.0-1021.21~24.04.1

ubuntu/linux-azure-fde<6.8.0-1058.65

6.8.0-1058.65

ubuntu/linux-azure-fde-6.14*

ubuntu/linux-azure-nvidia*

ubuntu/linux-azure-nvidia-6.14*

ubuntu/linux-gcp<6.8.0-1058.61

6.8.0-1058.61

ubuntu/linux-gcp-6.11*

ubuntu/linux-gcp-6.14*

ubuntu/linux-gcp-6.17<6.17.0-1021.24~24.04.1

6.17.0-1021.24~24.04.1

ubuntu/linux-gke<6.8.0-1054.60

6.8.0-1054.60

ubuntu/linux-gkeop<6.8.0-1041.44

6.8.0-1041.44

ubuntu/linux-hwe-6.11*

ubuntu/linux-hwe-6.14*

ubuntu/linux-hwe-6.17<6.17.0-41.41~24.04.1

6.17.0-41.41~24.04.1

ubuntu/linux-ibm<6.8.0-1055.56

6.8.0-1055.56

ubuntu/linux-lowlatency<6.8.0-117.117.1

6.8.0-117.117.1

ubuntu/linux-lowlatency-hwe-6.11*

ubuntu/linux-nvidia<6.8.0-1054.57

6.8.0-1054.57

ubuntu/linux-nvidia-6.11*

ubuntu/linux-nvidia-6.17<6.17.0-1031.31

6.17.0-1031.31

ubuntu/linux-nvidia-lowlatency<6.8.0-1054.57.1

6.8.0-1054.57.1

ubuntu/linux-nvidia-tegra<6.8.0-1024.24

6.8.0-1024.24

ubuntu/linux-oem-6.11*

ubuntu/linux-oem-6.14*

ubuntu/linux-oem-6.17<6.17.0-1030.30

6.17.0-1030.30

ubuntu/linux-oem-6.8*

ubuntu/linux-oracle<6.8.0-1054.55

6.8.0-1054.55

ubuntu/linux-oracle-6.14*

ubuntu/linux-oracle-6.17<6.17.0-1019.19~24.04.3

6.17.0-1019.19~24.04.3

ubuntu/linux-raspi<6.8.0-1056.60

6.8.0-1056.60

ubuntu/linux-raspi-realtime*

ubuntu/linux-realtime*

ubuntu/linux-riscv*

ubuntu/linux-riscv-6.14*

ubuntu/linux-riscv-6.17*

ubuntu/linux-xilinx<6.8.0-1032.33

6.8.0-1032.33

ubuntu/linux-bluefield<6.8.0-1022.26

6.8.0-1022.26

ubuntu/linux-raspi-realtime<6.8.0-2045.46

6.8.0-2045.46

ubuntu/linux-realtime<6.8.1-1051.52

6.8.1-1051.52

ubuntu/linux-realtime-6.14*

ubuntu/linux-realtime-6.17<6.17.0-1018.20~24.04.1

6.17.0-1018.20~24.04.1

ubuntu/linux-aws-fips<6.8.0-1055.58+fips1

6.8.0-1055.58+fips1

ubuntu/linux-azure-fips<6.8.0-1059.65+fips1

6.8.0-1059.65+fips1

ubuntu/linux-fips<6.8.0-116.116+fips1

6.8.0-116.116+fips1

ubuntu/linux-gcp-fips<6.8.0-1058.61+fips1

6.8.0-1058.61+fips1

ubuntu/linux*

ubuntu/linux-aws*

ubuntu/linux-azure*

ubuntu/linux-azure-fde*

ubuntu/linux-gcp*

ubuntu/linux-oracle*

ubuntu/linux-raspi*

ubuntu/linux-realtime*

ubuntu/linux-riscv*

debian/linux

6.1.176-16.1.190-16.12.107-16.12.115-27.2.15-17.3.3-1

Remediation

Recommended actions to resolve this vulnerability, in priority order.

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Fixed in 5.15.0-176.186~20.04.1
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Fixed in 5.15.0-1099.102~20.04.1
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Fixed in 5.15.0-1100.106~20.04.1
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Fixed in 5.15.0-175.185~20.04.1
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Fixed in 5.15.0-1102.108~20.04.1
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Fixed in 5.15.0-1099.103~20.04.1
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Fixed in 5.15.0-176.186
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Fixed in 6.8.0-1024.24
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Fixed in 6.17.0-1030.30
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Fixed in 6.8.0-1054.55
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Fixed in 6.17.0-1019.19~24.04.3
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Fixed in 6.8.0-1056.60
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Fixed in 6.8.0-1032.33
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Fixed in 6.8.0-1022.26
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Fixed in 6.8.0-2045.46
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Fixed in 6.8.1-1051.52
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Fixed in 6.17.0-1018.20~24.04.1
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Fixed in 6.8.0-1055.58+fips1
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Fixed in 6.8.0-1059.65+fips1
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Fixed in 6.8.0-116.116+fips1
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Fixed in 6.8.0-1058.61+fips1
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Fixed in 6.1.176-1Fixed in 6.1.190-1Fixed in 6.12.107-1Fixed in 6.12.115-2Fixed in 7.2.15-1Fixed in 7.3.3-1

Event History

Feb 4, 2026

CVE Published

via MITRE·04:08 PM

Data Sourced

via MITRE·04:08 PM

Description

Data Sourced

via OSV·05:16 PM

DescriptionSeverityAffected Software

Data Sourced

via NVD·05:16 PM

RemedyDescriptionSeverityWeaknessAffected Software

Parent advisories

This vulnerability appears in the following advisories.

Peer vulnerabilities

Found alongside the following vulnerabilities.

Frequently Asked Questions

What is the severity of CVE-2026-23101?

CVE-2026-23101 is classified as a moderate severity vulnerability in the Linux kernel.

How do I fix CVE-2026-23101?

To fix CVE-2026-23101, update to the latest version of the Linux kernel that includes the patch addressing this vulnerability.

What does CVE-2026-23101 affect?

CVE-2026-23101 affects the led-class subsystem of the Linux kernel.

What is the impact of CVE-2026-23101?

CVE-2026-23101 could lead to potential stability issues with the LED functionality in the Linux kernel.

When was CVE-2026-23101 published?

CVE-2026-23101 was published as part of the ongoing security updates for the Linux kernel.

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

Affected Software

Remediation

Event History

Parent advisories

Peer vulnerabilities

Frequently Asked Questions

What is the severity of CVE-2026-23101?

How do I fix CVE-2026-23101?

What does CVE-2026-23101 affect?

What is the impact of CVE-2026-23101?

When was CVE-2026-23101 published?

Company

Resources

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