CVEvulnerability
CVE-2026-3298
8.8 HIGH
Official page ↗
- Status
- Awaiting Analysis
- Published
- 2026-04-21
- Last modified
- 2026-10-26
- Assigner
- [email protected]
- CVSS 4.0 ([email protected])
- 8.8 HIGH — 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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
- Weaknesses
- CWE-787
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.
Related
Weakness · CWE (1)
- CWE-787 Out-of-bounds Write weakness
References
- https://github.com/python/cpython/commit/1274766d3c29007ab77245a72abbf8dce2a9db4d github.com
- https://github.com/python/cpython/commit/27522b7d6e6588f03e61099dd858cd5a9314e2f2 github.com
- https://github.com/python/cpython/commit/6c8b85b3f1d83d5697ec19880960e1eacee56688 github.com
- https://github.com/python/cpython/commit/95633d2aad4721e25e4dfd9f43dfb6e1edcbd741 github.com
- https://github.com/python/cpython/commit/f5ca38739241fe7a40a4b116d5a8a1364dd6fea7 github.com
- https://github.com/python/cpython/issues/148808 github.com
- https://github.com/python/cpython/pull/148809 github.com
- https://mail.python.org/archives/list/[email protected]/thread/KWTPIQBOOOUNQP7UFSLBI437NJDFLA3F/ mail.python.org