CVE-2026-64500 Linux CVE debrief

Who should care

Defenders responsible for Linux kernel and IIO ADC driver configurations, particularly those using LPC32xx-based systems, should assess exposure and prioritize patching. This includes reviewing system configurations, monitoring system logs for suspicious activity, and verifying patch application. Additionally, defenders should review compensating controls for exposed systems while remediation is scheduled and verified.

Why it matters

Defenders should prioritize patching and verification for this Linux kernel vulnerability in the IIO ADC driver for LPC32xx, as it could lead to system instability or crashes if exploited.

• Potential kernel panic due to uninitialized completion
• Possible system instability or crash
• Need for verification of patch application
• Priority for inventory checks and monitoring

Technical summary

The vulnerability is caused by the incorrect ordering of init_completion() and devm_request_irq() in the lpc32xx_adc_probe() function. This could lead to a kernel panic if an interrupt arrives before the completion is initialized. The fix involves moving the init_completion() call above devm_request_irq() to ensure that the completion is initialized before the IRQ is requested. Defenders should prioritize verifying and applying patches for this vulnerability, particularly for systems using the affected LPC32xx ADC driver.

Defensive priority

Defenders should prioritize verifying and applying patches for this vulnerability, particularly for systems using the affected LPC32xx ADC driver.

Recommended defensive actions

• Verify and apply patches for the LPC32xx ADC driver
• Review system configurations and inventory 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 the supplied official advisory or CVE record to validate affected scope, severity, and vendor guidance

Evidence notes

The vulnerability was reported by Jaeyoung Chung and resolved by moving the init_completion() call above devm_request_irq() in the lpc32xx_adc_probe() function. The fix prevents a potential kernel panic due to an uninitialized pointer dereference. The source details are limited, and defenders should verify patch application and review system configurations for 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.