CVE-2026-3298

N/A

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.

CVE Details

CVSS v3.1 ScoreN/A

Published4/21/2026

Last Modified4/21/2026

Sourcenvd

Honeypot Sightings0

Weaknesses (CWE)

CWE-787

References

https://github.com/python/cpython/commit/1274766d3c29007ab77245a72abbf8dce2a9db4d(cna@python.org)

https://github.com/python/cpython/commit/27522b7d6e6588f03e61099dd858cd5a9314e2f2(cna@python.org)

https://github.com/python/cpython/commit/95633d2aad4721e25e4dfd9f43dfb6e1edcbd741(cna@python.org)

https://github.com/python/cpython/issues/148808(cna@python.org)

https://github.com/python/cpython/pull/148809(cna@python.org)

https://mail.python.org/archives/list/security-announce@python.org/thread/KWTPIQBOOOUNQP7UFSLBI437NJDFLA3F/(cna@python.org)

IOC Correlations

No correlations recorded

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