Python Vulnerability Allows Out-of

Cybersecuritynews •Abinaya • April 24, 2026

A security vulnerability has been discovered in Python’s Windows asyncio implementation, allowing attackers to trigger out-of-bounds memory writes through a missing boundary check in network socket operations. The vulnerability, tracked as CVE-2026-3298, carries a high severity rating. It exclusively affects Windows platforms and was publicly disclosed on April 21, 2026. The flaw exists in the sock_recvfrom_into() method of Python’s asyncio.proactorEventLoop class, which is Windows’ native […]

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High-Severity Python Vulnerability Discovered in Windows Asyncio Module A critical security vulnerability has been identified in Python's asyncio implementation for Windows, specifically affecting the sock_recvfrom_into() method. This flaw, tracked as CVE-2026-3298, allows attackers to perform out-of-bounds memory writes, potentially leading to arbitrary code execution. The vulnerability was publicly disclosed on April 21, 2026, by Python security developer Seth Larson. It exclusively impacts Windows platforms, posing a significant risk to applications utilizing the asyncio module. Security professionals are urged to assess their systems for this vulnerability and implement necessary mitigations. As of now, no active exploitation has been reported, but the high severity rating indicates a pressing need for awareness and action. 2 sources 62

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Python Vulnerability Allows Out-of

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