Is a functional bug a security issue?

banfa.c

#include <stdio.h>
#include <stdlib.h>

void do_something_with_it(char *c) {
	strncpy(c, "antani", 4095);
	
	return;
}

int main(int argc, char **argv) {
	// my specs would require I process 1000 entries, instead I introduce a bug processing just 999
	for (int i=1; i<1000; i++) {
		c = malloc(4096*sizeof(char);
		do_something_with_it(c);
		free(c);
	}
	// as variant, you can consider to mispell the for cycle the other side, missing the <= sign.
	for (int i=0; i<999; i++) {
		c = malloc(4096*sizeof(char);
		do_something_with_it(c);
		free(c);
	}
}