CVE-2026-97455 Linux CVE debrief

Who should care

Linux kernel developers and maintainers, system administrators responsible for Linux kernel updates, and security teams should be aware of this vulnerability. They should review Linux kernel versions for potential exposure, monitor system logs for suspicious activity, and apply the patch to update the ACPICA implementation. Immediate attention is required to ensure the stability and security of affected systems.

Why it matters

A high-severity use-after-free vulnerability was found in the Linux kernel's ACPICA implementation. This issue requires immediate attention from Linux kernel developers, maintainers, and system administrators to ensure the stability and security of affected systems.

• Potential system crashes or instability
• Possible elevation of privileges
• Increased attack surface for local exploits

Technical summary

The Linux kernel's ACPICA implementation had a use-after-free vulnerability in acpi_ds_terminate_control_method(). This has been fixed by clearing references to method locals and arguments. The vulnerability could potentially lead to system crashes or instability and possible elevation of privileges. Immediate attention is required from Linux kernel developers, maintainers, and system administrators to ensure the stability and security of affected systems. Affected Linux kernel versions should be reviewed for potential exposure.

Defensive priority

High-priority patching recommended for Linux kernel deployments.

Recommended defensive actions

• Apply the patch to update the ACPICA implementation
• Review Linux kernel versions for potential exposure
• Monitor system logs for suspicious activity
• 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
• 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

Evidence notes

The CVE record and NVD entry provide details on the vulnerability. However, the scope of affected systems and versions is not explicitly stated. Defenders should verify Linux kernel versions for potential exposure and review system logs for suspicious activity. The vulnerability has been resolved in the Linux kernel, but affected versions and scope remain unclear. Further verification is necessary to determine the extent of potential exposure.

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.