Linux Kernel Ethernet Component Vulnerability Affecting DMA Handling

CVE-2026-43283

What is CVE-2026-43283?

A vulnerability has been identified in the Linux kernel's ethernet component related to the handling of direct memory access (DMA). The issue arises from the improper usage of the dma_free_coherent() function in the error handling path, where an incorrect DMA handle is used. This can lead to improper unmapping of memory buffers, potentially affecting system performance and stability. The vulnerability has been patched with a change to ensure that the correct physical address is used during DMA operations, enhancing the security and reliability of the affected ethernet components.

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