CVE-2026-64013 Linux CVE debrief

Who should care

Linux kernel maintainers, users, security teams, and operators should be aware of this vulnerability and take steps to mitigate it. Affected systems should be identified and patched to prevent potential kernel crashes. Security teams must review compensating controls for exposed systems.

Technical summary

The Linux kernel had a vulnerability where the ACPI GPE handler was not properly removed during ACPI button removal. This could lead to a kernel crash if ACPI notify was triggered after driver removal. The issue was addressed via commits 614cb8c and fe802511. Defenders should focus on applying kernel updates and monitoring for unusual ACPI activity. The vulnerability was introduced due to a change in the ACPI notify handler type for ACPI buttons.

Defensive priority

Medium

Recommended defensive actions

• Apply kernel updates
• Monitor for unusual ACPI activity
• Inventory Linux systems for exposure
• Review compensating controls for exposed systems
• Check relevant monitoring, detection, and logs for exposed assets
• Track exceptions and retest remediated assets
• Confirm whether affected product deployments exist in managed environments

Evidence notes

Official CVE and NVD records confirm the vulnerability. Kernel.org references provide patch details. The Linux kernel was vulnerable to a GPE handler leak during ACPI button removal, which could lead to a kernel crash if ACPI notify was triggered after driver removal. This issue was addressed via commits 614cb8c and fe802511. Defenders should verify affected systems, review official advisories, and monitor for unusual ACPI activity. The vulnerability affects Linux kernel versions and was publicly disclosed.

Official resources