CVE-2023-6507 Groups not dropped before running subprocess when using empty 'extra_groups' parameter

An issue was found in CPython 3.12.0 subprocess module on POSIX platforms. The issue was fixed in CPython 3.12.1 and does not affect other stable releases. When using the extragroups= parameter with an empty list as a value ie extragroups= the logic regressed to not call setgroups0, NULL before...