Out-of-bounds write in Windows asyncio.ProacterEventLoop.sock_recvfrom_into() when using nbytes
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.
01
describes (1)
Related CVEs.
| ID | severity | exploitable | ||
|---|---|---|---|---|
| CVE-2026-3298US | — | — | ||
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 ou… | ||||
02
references
External citations — patches, advisories, analysis.
- https://github.com/python/cpython/commit/1274766d3c29007ab77245a72abbf8dce2a9db4dWEB
- https://github.com/python/cpython/commit/27522b7d6e6588f03e61099dd858cd5a9314e2f2WEB
- https://github.com/python/cpython/commit/6c8b85b3f1d83d5697ec19880960e1eacee56688WEB
- https://github.com/python/cpython/commit/95633d2aad4721e25e4dfd9f43dfb6e1edcbd741WEB
- https://github.com/python/cpython/commit/f5ca38739241fe7a40a4b116d5a8a1364dd6fea7WEB
- https://github.com/python/cpython/issues/148808WEB
- https://github.com/python/cpython/pull/148809WEB
- https://mail.python.org/archives/list/security-announce@python.org/thread/KWTPIQBOOOUNQP7UFSLBI437NJDFLA3F/WEB
scry
Advisories like this name the exposed products attackers go after on your perimeter. See what is exposed on your perimeter with a free passive scan.
Free scan