Linux Kernel Vulnerability in BCM QSPI Driver

CVE-2023-53658

What is CVE-2023-53658?

A vulnerability exists in the Linux kernel's BCM QSPI driver, which fails to properly handle error states when neither 'hif_mspi' nor 'mspi' resources are present. Instead of managing the absence of resources correctly, the driver proceeds with a null pointer dereference on removal, potentially leading to system instability. The issue stems from a previous code modification that made the flaw more apparent but was not the root cause. The resolution involves implementing proper error management mechanisms that can gracefully handle null resource situations.

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