Kernel Vulnerability in Linux Affecting Cortex-A76 Processor from Linux Vendor

CVE-2022-49888

Summary

A vulnerability in the Linux kernel related to the Cortex-A76 processor can lead to stack overflow conditions. The issue arises when the cortex_a76_erratum_1463225_debug_handler() function is probed during the handling of debug exceptions. When this occurs, a series of recursive exceptions can be triggered, resulting in a kernel panic. This issue has been identified as a regression from an earlier patch that inadvertently removed essential annotations preventing probing of the function, subsequently allowing conditions leading to a kernel stack overflow.

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