Security Flaw in Linux Kernel Affecting RISC-V Page Table Management

CVE-2026-53312

What is CVE-2026-53312?

A vulnerability in the Linux kernel affects the RISC-V architecture's handling of page tables, specifically during the invalidation path. This flaw can lead to an infinite loop if certain conditions are met, primarily because of an overflow that occurs when handling a sign-extended page table. The issue arises from improper calculations involving ULONG_MAX, which enables a looping scenario that could potentially disrupt system stability. The fix involves adjusting the computation logic to prevent overflow and ensure proper operation.

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