Vulnerabilities CVE-2026-3298

CVE-2026-3298

High

Open

TLP:CLEAR

Out-of-bounds write in Windows asyncio.ProacterEventLoop.sock_recvfrom_into() when using nbytes

NVD CVE.org

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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.

Details

CVSS Score: 8.8
EPSS Score ⓘ: 0.39%

32.2th percentile
CVSS Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:H/SC:N/SI:N/SA:N
Confidence: 90%
Published: Apr 21, 2026
Last Modified: Aug 13, 2026

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