Description

The method "sock_recvfrom_into()" of "asyncio.ProacterEventLoop" (Windows only) was missing a boundary check for the data buffer when using nbytes parameter. This allowed for an out-of-bounds buffer write if data was larger than the buffer size. Non-Windows platforms are not affected.

INFO

Published Date :

2026-04-21T14:45:01.919Z

Last Modified :

2026-04-21T20:19:01.610Z

Source :

PSF
AFFECTED PRODUCTS

The following products are affected by CVE-2026-3298 vulnerability.

Vendors Products
Python
  • Cpython
REFERENCES

Here, you will find a curated list of external links that provide in-depth information to CVE-2026-3298.

URL Resource
https://github.com/python/cpython/commit/1274766d3c29007ab77245a72abbf8dce2a9db4d cve-icon cve-icon
https://github.com/python/cpython/commit/27522b7d6e6588f03e61099dd858cd5a9314e2f2 cve-icon cve-icon
https://github.com/python/cpython/commit/95633d2aad4721e25e4dfd9f43dfb6e1edcbd741 cve-icon cve-icon
https://github.com/python/cpython/issues/148808 cve-icon cve-icon
https://github.com/python/cpython/pull/148809 cve-icon cve-icon
https://mail.python.org/archives/list/[email protected]/thread/KWTPIQBOOOUNQP7UFSLBI437NJDFLA3F/ cve-icon cve-icon
Login to claim this CVE

CVSS Vulnerability Scoring System

Detailed values of each vector for above chart.
Attack Vector
Attack Complexity
Attack Requirements
Privileges Required
User Interaction
VS Confidentiality
VS Integrity
VS Availability
SS Confidentiality
SS Integrity
SS Availability