CVE-2026-3298
NoneCVSS
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EPSS
0.6%
Published
Apr 21, 2026
CISA due date
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The record
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.
Affected packages
| Ecosystem | Package | Introduced | Fixed |
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