CVE-2026-97582 Linux CVE debrief

Who should care

Linux kernel developers and maintainers, Linux distribution maintainers, and users of Linux-based systems with gpio-fan drivers should be aware of this vulnerability and take necessary actions to prevent potential system instability or crashes. They should review and apply patches, verify driver updates, and monitor system logs for issues.

Why it matters

This vulnerability requires attention from Linux kernel developers, maintainers, and users of Linux-based systems with gpio-fan drivers. The use-after-free condition can lead to system instability or crashes. Verification of gpio-fan driver updates and monitoring of system logs are necessary.

• Potential system crashes or instability
• Possible elevation of privileges
• Required verification of gpio-fan driver updates
• Necessity to monitor system logs for issues

Technical summary

The Linux kernel's hwmon gpio-fan driver has a use-after-free vulnerability. The fan_alarm_irq_handler() queues a work item, but it is not cancelled. When the hwmon device is unbound, the interrupt is freed, but the work item may still run, leading to a use-after-free condition. This issue was resolved by replacing INIT_WORK() with devm_work_autocancel(). Linux kernel developers and maintainers should review and apply the patch to prevent potential system instability or crashes. Users of Linux-based systems with gpio-fan drivers should verify the gpio-fan driver is updated and monitor system logs for potential issues.

Defensive priority

Medium

Recommended defensive actions

• Review and apply the patch to the Linux kernel
• Verify the gpio-fan driver is updated
• Monitor system logs for potential issues
• 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 NVD entry provide details about the vulnerability in the Linux kernel's hwmon gpio-fan driver. However, the scope of affected systems and versions is not explicitly stated, requiring further verification by Linux kernel developers, maintainers, and users of Linux-based systems with gpio-fan drivers to confirm whether their deployments are affected and to apply patches or mitigations as necessary.

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.