Memory Management Issue in Linux Kernel Affecting cpufreq_policy Reference Handling

CVE-2025-21841

Summary

A memory management vulnerability in the Linux kernel has been identified within the cpufreq/amd-pstate module. Specifically, the amd_pstate_update_limits function incorrectly handles reference counting for the cpufreq_policy structure, failing to decrement the reference counter during one of its exit paths. This oversight can lead to potential stability issues and resource leaks, affecting the overall performance of systems utilizing the AMD p-state driver.

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