Vulnerability in Linux Kernel Affecting Texas Instruments DMA Controller

CVE-2025-38042

What is CVE-2025-38042?

The Linux kernel has a vulnerability that affects Texas Instruments' DMA engine implementation, particularly in the ti_am65_cpsw_nuss driver. The function k3_udma_glue_reset_rx_chn() previously relied on user-supplied arguments to determine how to handle flow descriptor queues (FDQs) in different DMA architectures. The vulnerability arose when different platforms had varying architectures requiring either a single FDQ for all flows or separate FDQs for each flow, leading to potential inconsistencies and undesired behavior. A fix has replaced the reliance on user input with automatic inference based on the detected DMA architecture, enhancing stability and performance.

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