Kernel Hang Vulnerability in Rockchip ARM Processors

CVE-2025-39752

What is CVE-2025-39752?

The Linux kernel vulnerability identified in Rockchip ARM processors can lead to system hangs during the SMP initialization process. This issue arises when the main CPU writes trampoline code to SRAM while secondary CPUs remain powered on. This situation can cause secondary CPUs to execute unexpected code, leading to kernel hangs. The correction involves moving the SRAM initialization step to occur only when all secondary CPUs are powered down, effectively resolving these rare hang occurrences on Rockchip RK3188 processors.

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