Linux Kernel WiFi Driver Vulnerability Affects mwifiex Product by Linux

CVE-2026-98426

What is CVE-2026-98426?

A vulnerability in the mwifiex driver of the Linux kernel allows for an IRQ leak due to improper handling of MSI-X error paths. Specifically, when a request for an IRQ fails, the cleanup process incorrectly frees IRQ vectors without matching the appropriate device ID. This results in the failure to free already requested IRQs, leading to potential resource leaks and system instability. Developers should apply the necessary patches to ensure that irq management is properly aligned with their respective device IDs to prevent leakage.

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