CVE-2026-93128

Kernel crash via unchecked LED registration state

Published Sep 17, 2026 · Updated Sep 17, 2026

Invalid LED access in Linux lg-laptop allows local users to crash the kernel via a backlight event after registration failure. In drivers/platform/x86/lg-laptop.c, wmi_notify() dereferences kbd_backlight.dev without checking registration success, while acpi_remove() unconditionally unregisters optional LEDs. Exposure requires the affected driver on compatible hardware and failed LED registration; the crash consequence is inferred from the unchecked dereference, not an established code-execution capability.

CVSS severity4.7
Medium
EPSS probability0.20%
Next 30 days · Oct 19, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Invalid LED access in Linux lg-laptop allows local users to crash the kernel via a backlight event after registration failure. In drivers/platform/x86/lg-laptop.c, wmi_notify() dereferences kbd_backlight.dev without checking registration success, while acpi_remove() unconditionally unregisters optional LEDs. Exposure requires the affected driver on compatible hardware and failed LED registration; the crash consequence is inferred from the unchecked dereference, not an established code-execution capability.

The record

CVE
CVE-2026-93128
Published
Sep 17, 2026
Updated
Sep 17, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1499.004
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Sep 17, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 17, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=5.15
  2. Affected versionversion=ae26278829a80ad0e60ff004de71e9276cee5dc0 <3e91964aa74ab261aa15d9d96318eded2fd9d22a
  3. Affected versionversion=ae26278829a80ad0e60ff004de71e9276cee5dc0 <4fbfe3714f645b6c64c9ba8faa83b27e4c9f2edd
  4. Affected versionversion=ae26278829a80ad0e60ff004de71e9276cee5dc0 <9a85e2d35e54248aca39bad4f4152ed34de1995f
  5. Affected versionversion=ae26278829a80ad0e60ff004de71e9276cee5dc0 <acc190322250562d5f28860f4ae1ebaf3e304fc2

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=5.15; version=ae26278829a80ad0e60ff004de71e9276cee5dc0 <3e91964aa74ab261aa15d9d96318eded2fd9d22a; version=ae26278829a80ad0e60ff004de71e9276cee5dc0 <4fbfe3714f645b6c64c9ba8faa83b27e4c9f2edd; version=ae26278829a80ad0e60ff004de71e9276cee5dc0 <9a85e2d35e54248aca39bad4f4152ed34de1995f; version=ae26278829a80ad0e60ff004de71e9276cee5dc0 <acc190322250562d5f28860f4ae1ebaf3e304fc2

Published CVSS scores

4.7Amazon LinuxCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Activity data is delayed. The latest report is Sep 28, 2026.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 22, 2026Sep 28, 2026
Latest reporting daySep 28, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

T1499.004Endpoint Denial of Service: Application or System Exploitation

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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