Memory Management Issue in Linux Kernel Affects System Performance

CVE-2026-93253

What is CVE-2026-93253?

A vulnerability in the Linux kernel has been identified that pertains to the improper management of memory during the initialization phase of the boot process. Specifically, reserved memory allocated for the cpumask was being freed prematurely, leading to potential system instability. This issue arises during the boot sequence with the 'nohz_full' kernel boot parameter, where a warning is triggered indicating that memory cannot be freed due to deferred initialization of the memory map. To address this, the fix involves deferring the free operation until the memory map is fully initialized, ensuring system stability and performance.

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