Linux Kernel Vulnerability in ARM Architecture

CVE-2026-53343

What is CVE-2026-53343?

The vulnerability in the Linux kernel pertains to a flaw in the ARM architecture related to KASAN VMAP stack shadow. This issue arises from the inappropriate use of a byte load operation, which fails to guarantee word alignment during access to the KASAN shadow memory. Specifically, ARMv5 architecture faces alignment exceptions when unaligned word loads occur, potentially leading to system crashes during critical operations. The recommended solution involves modifying the code to utilize a byte load, ensuring that faults only occur if the stack shadow is missing, thereby enhancing stability and reliability.

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