Linux Kernel Memory Management Vulnerability in Memory Control Groups

CVE-2026-89752

What is CVE-2026-89752?

A vulnerability in the Linux kernel's memory management system allows concurrent updates to memory control limits, which can lead to indefinite blocking during reclaim operations. This occurs when one process attempts to lower memory limits while another simultaneously raises them, resulting in the first process getting stuck in a loop due to mismatched target values. The patch resolves this issue by checking the current limit at each reclaim iteration, ensuring that processes do not continue to operate on outdated limits, thus preventing unnecessary out-of-memory events.

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