Memory Allocation Vulnerability in Linux Kernel Affects Stability

CVE-2025-21817

Summary

A vulnerability in the Linux kernel occurs when the sysfs store method is executed while a queue is frozen, leading to memory allocation calls using GFP_KERNEL. This situation can invoke direct reclaim logic and potentially cause a deadlock in the system. The issue has been addressed by appropriately marking the sysfs store method with GFP_NOIO to prevent this scenario. It's crucial for users and system administrators to ensure they are using patched versions to maintain system stability.

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