“FreeBSD-SA-20:33.openssl”(The FreeBSD Project),

This advisory includes an independently-developed backport of the patch for FreeBSD 11.4.
(snip)
0. Revision History

v1.0 2020-12-08 Initial release.
v1.1 2020-12-14 Added FreeBSD 11.4 patch.
ということなので，11.4-RELEASE-p6に更新した…