CVE-2026-3298

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.

More information : https://github.com/python/cpython/commit/1274766d3c29007ab77245a72abbf8dce2a9db4d