Python Vulnerability Allows Out-of-Bounds Write on Windows Systems

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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