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.
Advisories
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Fixes
Solution
No solution given by the vendor.
Workaround
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References
History
Tue, 21 Apr 2026 17:15:00 +0000
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| First Time appeared |
Python
Python cpython |
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| Vendors & Products |
Python
Python cpython |
Tue, 21 Apr 2026 15:00:00 +0000
| Type | Values Removed | Values Added |
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| 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. | |
| Title | Out-of-bounds write in Windows asyncio.ProacterEventLoop.sock_recvfrom_into() when using nbytes | |
| Weaknesses | CWE-787 | |
| References |
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| Metrics |
cvssV4_0
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Status: PUBLISHED
Assigner: PSF
Published:
Updated: 2026-04-21T20:19:01.610Z
Reserved: 2026-02-26T20:12:47.041Z
Link: CVE-2026-3298
No data.
Status : Awaiting Analysis
Published: 2026-04-21T15:16:37.047
Modified: 2026-04-21T16:20:24.180
Link: CVE-2026-3298
No data.
OpenCVE Enrichment
Updated: 2026-04-21T17:00:11Z
Weaknesses