CVE-2026-98664 Linux CVE debrief

Who should care

Linux system administrators and developers using the iio: imu: adis16400 driver should assess exposure and apply patches or mitigations as needed. They should also verify patch application to prevent potential denial of service and data inconsistencies. Additionally, security teams and vulnerability management teams should review the vulnerability and prioritize patching based on their specific environments and risk assessments.

Why it matters

CVE-2026-98664 is a Linux kernel vulnerability allowing unprotected debugfs reads in the iio: imu: adis16400 driver. Linux system administrators and developers should assess exposure, apply patches, and verify patch application to prevent potential denial of service and data inconsistencies.

• Potential denial of service due to improper debugfs handling
• Need for verification of Linux kernel patch application
• Possible data inconsistencies due to unprotected reads

Technical summary

The Linux kernel's iio: imu: adis16400 driver has a vulnerability allowing unprotected debugfs reads. The adis16400_serial_number_fops is open-coded and does not call debugfs_file_get(), which can lead to the iio_dev being freed underneath it. While product_id and flash_count were converted to DEFINE_DEBUGFS_ATTRIBUTE, serial_number still requires a custom implementation. This vulnerability can cause potential denial of service and data inconsistencies due to unprotected reads. Linux system administrators and developers should assess exposure and apply patches or mitigations as needed.

Defensive priority

Medium

Recommended defensive actions

• Review and apply the Linux kernel patch to address the vulnerability
• Monitor Linux kernel updates for additional fixes
• Inventory Linux systems using the affected driver
• Verify patch application by reviewing Linux kernel patch commit history
• 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

Evidence notes

The CVE record and NVD entry provide limited information about the vulnerability. The Linux kernel patch notes and Git commit history provide additional context. To verify patch application, defenders should review Linux kernel patch commit history and verify the presence of the fix in their specific Linux distributions. The vulnerability affects the iio: imu: adis16400 driver, and defenders should focus on systems using this driver. Evidence is limited, and further verification tasks are needed to ensure patch effectiveness.

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.