Kernel Mapping Vulnerability in Linux by ARM

CVE-2026-53288

What is CVE-2026-53288?

A memory management vulnerability in the Linux Kernel for ARM architecture allows for potential overflow of the init_pg_end segment into a neighboring page during early kernel mapping. This occurs due to the use of 2MB block entries while certain kernel segments maintain a 64KB alignment. Consequently, segments crossing these boundaries necessitate an additional page table. The flaw has been addressed by increasing the early mapping allowance by one page, enhancing the robustness of memory management and preventing potential exploitation.

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