CVE-2021-3156
It appears that Solaris 10 is vulnerable:
% sudoedit -s '\' `perl -e 'print "A" x 65536'`
Segmentation Fault (core dumped)
% cat /etc/release
Oracle Solaris 10 1/13 s10s_u11wos_24a SPARC
Copyright (c) 1983, 2013, Oracle and/or its affiliates. All rights reserved.
Assembled 17 January 2013
%
Should we expect a patch if we have extended support?