In the Linux kernel, the following vulnerability has been resolved: drivers: virt: acrn: hsm: Use kzalloc to avoid info leak in pmcmdioctl In the "pmcmdioctl" function, three memory objects allocated by kmalloc are initialized by "hcallgetcpustate", which are then copied to user space. The initializer is indeed implemented in "acrnhypercall2" (arch/x86/include/asm/acrn.h). There is a risk of information leakage due to uninitialized bytes.