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CVE-2026-3298

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

Description (CNA)

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.

Affected (CNA)

Vendor / productVersions
Python Software Foundation / CPythonaffected 0 before 3.11.16; affected 3.12.0 before 3.12.14; affected 3.13.0 before 3.13.14; affected 3.14.0a1 before 3.14.5rc1; affected 3.15.0a1 before 3.15.0b1

CWE

CWE-787

References

ADP enrichment

CISA-ADP

No English description supplied.

No references supplied.