EUVD-2026-26356

When exchanging data over a socket, libnv uses select2 to wait for data to arrive. However, it does not verify whether the provided socket descriptor fits in select2's file descriptor set size limit of FDSETSIZE 1024. An attacker who is able to force a libnv application to allocate large file...

PYSEC-2022-205

Waitress is a Web Server Gateway Interface server for Python 2 and 3. Waitress versions 2.1.0 and 2.1.1 may terminate early due to a thread closing a socket while the main thread is about to call select. This will lead to the main thread raising an exception that is not handled and then causing t...

OpenBSD contains buffer overflow in "select" call

Overview A locally exploitable buffer overflow exists in all versions of OpenBSD. Description The buffer overflow exists in the select2 system call. The overflow occurs if select is supplied with arbitrary negative values. --- Impact Local users can gain system privileges and execute code in the...