Spinlock Nesting Vulnerability in Linux Kernel Affects Intel Data Plane Development Kit

CVE-2026-31647

What is CVE-2026-31647?

A vulnerability has been identified in the Linux kernel involving improper management of spinlock nesting in the Intel Data Plane Development Kit (DPDK). The issue arises from the use of a raw spinlock in the idpf_vc_xn structure instead of a local lock. This change allows for safe completion handling and helps prevent invalid wait contexts encountered by the kernel during asynchronous processing. The identified problem triggered errors during the execution of the idpf_mac_filter_async_handler, highlighting the importance of addressing spinlock usage within kernel modules to ensure robust system performance.

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