CVE-2026-64510 Linux CVE debrief

Who should care

Linux kernel developers and maintainers, Linux distribution maintainers, users of Linux systems, and security teams responsible for vulnerability management and patch application. These stakeholders should review and apply patches, verify Linux kernel versions, and monitor system logs for potential issues related to ACPI Machine Check Exceptions.

Why it matters

This vulnerability requires attention from Linux kernel developers, maintainers, and users. The use-after-free vulnerability can lead to system crashes, potential elevation of privileges, or arbitrary code execution. It is essential to review and apply patches, verify Linux kernel versions, and monitor system logs for potential issues.

• Potential system crashes or instability due to use-after-free
• Possible elevation of privileges or arbitrary code execution
• Required verification of Linux kernel versions and patch application
• Potential impact on system reliability and security

Technical summary

The vulnerability exists in the Linux kernel's ACPI NFIT core, specifically in the acpi_nfit_init() function. When this function fails after adding an acpi_desc object to the acpi_descs list, the object is not removed, leading to a dangling pointer. This can cause a use-after-free when handling ACPI Machine Check Exceptions. The affected product deployments require review and verification of Linux kernel versions to ensure patch application and system log monitoring for potential issues. The vulnerability has a CVSS score of 7 and is classified as HIGH severity.

Defensive priority

High

Recommended defensive actions

• Review and apply the provided patches to ensure the vulnerability is addressed
• Verify the Linux kernel version and update to a patched version if necessary
• Monitor system logs for potential ACPI Machine Check Exceptions
• Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up
• Review compensating controls for exposed systems while remediation is scheduled and verified
• Check relevant monitoring, detection, and logs for exposed assets that need extra review
• Track exceptions, retest remediated assets, and close the item only after evidence is documented

Evidence notes

The CVE record and source item provide details on the vulnerability, including its description and affected versions. However, the corpus does not establish specific exploitation or impact details, requiring verification from official sources.

Sources and references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.