Improper IRQ Management in Linux Kernel's i40e by Intel

CVE-2025-39911

What is CVE-2025-39911?

The i40e driver in the Linux kernel contains a flaw in the IRQ management process that occurs when the request_irq() function fails during its execution. Specifically, during an error handling path, the driver's incorrect use of the dev_id argument in free_irq() prevents proper deallocation of previously requested IRQs. This flaw can lead to system instability, triggering warnings due to attempts to free already-released IRQs, and potentially interfering with network functionality.

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