id	summary	reporter	owner	description	type	status	component	version	resolution	keywords	cc	guest	host
18897	INT3 freezes Windows guest with single CPU	plujon		"If an int3 x86 instruction is executed in any program in the guest, the entire guest becomes unresponsive, and one core of the CPU on the host goes to 100%.

The test case is

int main(void) { __asm int 3; }

Note that the freeze does not occur if the guest has 2 or more CPUs."	defect	closed	other	VirtualBox 5.2.28	invalid			Windows	Linux