CVE-2024-12254 Affecting python313-base package, versions <3.13.5-150700.4.11.1


Severity

Recommended
0.0
high
0
10

Based on SUSE Linux Enterprise Server security rating.

Threat Intelligence

EPSS
0.25% (49th percentile)

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  • Snyk IDSNYK-SLES157-PYTHON313BASE-10500172
  • published25 Jun 2025
  • disclosed24 Jun 2025

Introduced: 24 Jun 2025

CVE-2024-12254  (opens in a new tab)

How to fix?

Upgrade SLES:15.7 python313-base to version 3.13.5-150700.4.11.1 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream python313-base package and not the python313-base package as distributed by SLES. See How to fix? for SLES:15.7 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 Base Scores

version 3.1