Starting in Python 3.12.0, the asyncio._SelectorSocketTransport.writelines()
 method would not "pause" writing and signal to the Protocol to drain 
the buffer to the wire once the write buffer reached the "high-water 
mark". Because of this, Protocols would not periodically drain the write
 buffer potentially leading to memory exhaustion.





This
 vulnerability likely impacts a small number of users, you must be using
 Python 3.12.0 or later, on macOS or Linux, using the asyncio module 
with protocols, and using .writelines() method which had new 
zero-copy-on-write behavior in Python 3.12.0 and later. If not all of 
these factors are true then your usage of Python is unaffected.