Executive Summary

This vulnerability is a critical memory allocation bug in the Linux kernel's EDMA driver. Specifically, the queue_priority_map was allocated with insufficient memory because the code used sizeof(s8) instead of the correct size for a 2D array. This caused out-of-bounds memory writes when the code accessed elements of queue_priority_map, leading to memory corruption and kernel crashes on ARM platforms during the EDMA driver probe.

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Impact Analysis

The vulnerability can cause kernel crashes due to out-of-bounds memory writes and memory corruption. On affected ARM platforms, such as BeagleBoard-X15, this can result in system instability or denial of service during the EDMA driver initialization, potentially disrupting normal operation.

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Mitigation Strategies

To mitigate this vulnerability, update the Linux kernel to a version that includes the fix for the memory allocation size in the edma driver (specifically the fix in edma_setup_from_hw() for queue_priority_map). This prevents out-of-bounds memory writes and kernel crashes on affected ARM platforms.

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