CVE-2024-12254 Affecting python3.12 package, versions <3.12.7-1ubuntu1.1


Severity

Recommended
medium

Based on Ubuntu security rating.

Threat Intelligence

EPSS
0.05% (18th percentile)

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  • Snyk IDSNYK-UBUNTU2410-PYTHON312-8492317
  • published21 Jan 2025
  • disclosed6 Dec 2024

Introduced: 6 Dec 2024

CVE-2024-12254  (opens in a new tab)

How to fix?

Upgrade Ubuntu:24.10 python3.12 to version 3.12.7-1ubuntu1.1 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream python3.12 package and not the python3.12 package as distributed by Ubuntu. See How to fix? for Ubuntu:24.10 relevant fixed versions and status.

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.

CVSS Scores

version 3.1