Error in CAN reception
When one of the CAN nodes detects an error, it issues an error frame.
This is a frame that starts with at least 6 dominant bits, which is violates the bit stuffing rule.

The dominant bit does what it's named after. Inhibiting all other traffic of the bus until the frame is cleared. Interrupting the currently transmitting node, which could then start transmitting again after bus arbitration.
Depending on the NART (no automatic re-transmit) setting of course.

Also, CAN always transmits to all nodes. There is no addressing.
The identifier describes the content of the message.
The transmitter also does not know which node issued the error frame.