In Storage Performance Development Kit (SPDK) before 19.07, a user of a vhost can cause a crash if the target is sent invalid input.

In Storage Performance Development Kit (SPDK) before 19.01, a malicious vhost client (i.e., virtual machine) could carefully construct a circular descriptor chain that would result in a partial denial of service in the SPDK vhost target, because the vhost target did not properly detect such chains.

An issue was discovered in Storage Performance Development Kit (SPDK) before 20.01.01. If a PDU is sent to the iSCSI target with a zero length (but data is expected), the iSCSI target can crash with a NULL pointer dereference.