CVE-2026-97501 Linux CVE debrief

Who should care

Linux kernel developers and maintainers, as well as users who rely on the Linux kernel for their systems, should review the patch and apply it to their systems to prevent potential warnings or issues related to gpiochip operations. They should also verify GPIO direction and level values do not require toggling the pinmux or any other pin config options and monitor for any potential warnings or issues related to gpiochip operations.

Why it matters

A Linux kernel vulnerability was resolved, addressing an issue with the pinctrl GPIO layer in set GPIO direction. The vulnerability causes a gpiochip operations to need to sleep and results in a huge warning. Defenders should review and apply the patch, verify GPIO direction and level values, and monitor for potential warnings.

• Defenders should verify GPIO direction and level values do not require toggling the pinmux or any other pin config options
• Defenders should review and apply the patch to the Linux kernel to prevent potential warnings or issues related to gpiochip operations
• Defenders should monitor for any potential warnings or issues related to gpiochip operations

Technical summary

The Linux kernel vulnerability causes a gpiochip operations to need to sleep and results in a huge warning. The issue was resolved by switching to directly calling mtk_pinmux_gpio_set_direction() in the GPIO set direction callbacks. This change prevents the pinctrl mutex from being taken, avoiding a potential deadlock with the shared GPIO proxy. The vulnerability affects Linux kernel developers and maintainers, who should review and apply the patch to their systems to prevent potential warnings or issues related to gpiochip operations.

Defensive priority

Medium

Recommended defensive actions

• Review and apply the patch to the Linux kernel
• Verify the GPIO direction and level values do not require toggling the pinmux or any other pin config options
• Monitor for any potential warnings or issues related to gpiochip operations
• Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up.
• Plan vendor-supported updates or mitigations through normal change control where exposure is confirmed.
• 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.

Evidence notes

The CVE record and NVD vulnerability detail page provide information on the vulnerability. Two source references are available, providing additional context. The Linux kernel vulnerability causes a gpiochip operations to need to sleep and results in a huge warning. The issue was resolved by switching to directly calling mtk_pinmux_gpio_set_direction() in the GPIO set direction callbacks. Defenders should verify GPIO direction and level values do not require toggling the pinmux or any other pin config options.

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.