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CVE-2024-42110 is a Linux kernel networking flaw in ntb_netdev receive processing. When ntb_transport uses an idxd Data Streaming Accelerator DMA engine, ntb_netdev_rx_handler() can be invoked from the idxd driver's threaded interrupt completion handler. The handler incorrectly calls __netif_rx(), which is restricted to interrupt context, despite a threaded interrupt handler executing in normal preemptible context. This causes a kernel BUG warning involving smp_processor_id() in preemptible code. The correction replaces __netif_rx() with netif_rx(), which supports invocation from normal context.
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Linux kernel vulnerability covered by the security update.
Linux kernel NTB netdev receive-handler flaw.
Linux kernel NTB network-device receive-path handling flaw.
A Linux kernel ntb_netdev networking-driver context-handling flaw triggered when Intel idxd DMA-engine completion processing uses threaded IRQs. The correction replaces __netif_rx() with netif_rx() so receive processing is valid outside hard or soft interrupt context.
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Cross-references every affected SKU, including bundled OEM variants.
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