Vermagic is a magic string present in the Linux Kernel and added into the .modinfo section of the Linux Kernel Modules.

This is used to verify whether the kernel module was compiled for the particular kernel version or not.

‘VERMAGIC_STRING’ is generated by the kernel configuration.

#define VERMAGIC_STRING                         \
    UTS_RELEASE " "                         \
    MODULE_VERMAGIC_SMP MODULE_VERMAGIC_PREEMPT             \
    MODULE_VERMAGIC_MODULE_UNLOAD MODULE_VERMAGIC_MODVERSIONS   \
    MODULE_ARCH_VERMAGIC                        \
    MODULE_RANDSTRUCT_PLUGIN