Can we use reserved location of IVT ? I want to use this to verify if I'm downloading correct hex file even though checksum is passed?

[JSHAR.1890]

Can we use the reserved location of IVT as defined below 0x08000000

__vector_table
 DCD sfe(CSTACK)
 DCD Reset_Handler ; Reset Handler
 
 DCD NMI_Handler ; NMI Handler
 DCD HardFault_Handler ; Hard Fault Handler
 DCD MemManage_Handler ; MPU Fault Handler
 DCD BusFault_Handler ; Bus Fault Handler
 DCD UsageFault_Handler ; Usage Fault Handler
 DCD 0x08000000 ; Reserved
 DCD 0 ; Reserved
 DCD 0 ; Reserved

[TDK]

Yes. The CPU won't care about unused locations in the vector table as those interrupts should never get triggered.