CVE-2026-64499 Linux CVE debrief

Who should care

Linux kernel developers and maintainers, Linux distribution maintainers, and users of Linux-based systems. These stakeholders should assess exposure and apply the patch or update to the fixed version to prevent potential system instability. The vulnerability is related to a PM reference leak in the buffer preenable of the ti-ads1119 ADC driver, and the ads1119_triggered_buffer_preenable function resumes the device with pm_runtime_resume_and_get before

Why it matters

CVE-2026-64499 is a Linux kernel vulnerability that requires verification and patch application to prevent potential system instability. The vulnerability is related to a PM reference leak in the buffer preenable of the ti-ads1119 ADC driver. Linux kernel developers and maintainers, Linux distribution maintainers, and users of Linux-based systems should assess exposure and apply the patch or update to the fixed version.

• Verify patch application to prevent potential system instability
• Monitor system for unusual activity related to the affected component
• Assess exposure based on system configuration and deployment context

Technical summary

The Linux kernel vulnerability is related to a PM reference leak in the buffer preenable of the ti-ads1119 ADC driver. The ads1119_triggered_buffer_preenable function resumes the device with pm_runtime_resume_and_get before starting a conversion. If the i2c_smbus_write_byte function fails, the function returns the error directly and leaves the runtime PM usage counter elevated. This may cause potential system instability if not addressed. Linux kernel developers and maintainers, Linux distribution maintainers, and users of Linux-based systems should assess exposure and apply the patch or update to the fixed version.

Defensive priority

Verify and apply patch

Recommended defensive actions

• Verify if the system uses the affected Linux kernel component
• Apply the patch or update to the fixed version
• Monitor system for unusual activity
• Review system configuration and deployment context
• Track exceptions and retest remediated assets
• Check relevant monitoring, detection, and logs for exposed assets that need extra review
• 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 details on the Linux kernel vulnerability. However, the scope of affected systems and versions requires further verification. The vulnerability is related to a PM reference leak in the buffer preenable of the ti-ads1119 ADC driver. The ads1119_triggered_buffer_preenable function resumes the device with pm_runtime_resume_and_get before starting a conversion. If the i2c_smbus_write_byte function fails, the function returns the error directly and leaves the runtime PM usage counter elevated. The

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.