DEBIAN-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.
Risk Scores
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Debian:13 | python3.13 | 0, 0, 0 |
| Debian:14 | python3.13 | 0, 0, 0 |
Exploit Intelligence
- cve_test.go (github-poc)
- cve_test.go (github-poc)
Timeline
- Dec 6, 2024 CVE Published
- Apr 28, 2026 CVE Updated