CVE-2024-12254

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.

• CVE ID
• CVE-2024-12254

• Assigner
• PSF

• Vulnerability Status
• PUBLISHED

• Published Version
• 2024-12-06T15:19:41.576Z

• Last Modified Date
• 2024-12-06T19:02:35.550Z