Memory Handling Flaw in Linux Kernel Affecting THP on x86 Servers

CVE-2025-40230

What is CVE-2025-40230?

A critical vulnerability in the Linux kernel affects the handling of Transparent Huge Pages (THP) on x86 servers, leading to unexpected kernel panics. Specifically, when a memory error is triggered in userspace, the kernel enters a state of panic instead of correctly terminating the impacted process. The issue arises during the splitting process of THP when errors are encountered, which results in multiple memory check exceptions and ultimately causes the kernel to fail. This flaw can have severe implications for system stability and reliability, as it disrupts normal operation and can lead to a complete system halt.

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