The FreeBSD Security Team has announced End-of-Life (EoL) for FreeBSD version 11.1. Those still on it may consider upgrading to a later version, as patches and updates will no longer be available on September 30, 2018.

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Dear FreeBSD community,

As of September 30, 2018, FreeBSD 11.1 will reach end-of-life and will no
longer be supported by the FreeBSD Security Team.  Users of FreeBSD 11.1 are
strongly encouraged to upgrade to a newer release as soon as possible.

The currently supported branches and releases and their expected
end-of-life dates are:

 +--------------------------------------------------------------------------+
 |   Branch  |   Release  |  Type  |   Release Date |     Estimated EoL     |
 +-----------+------------+--------+----------------+-----------------------+
 |stable/10  |n/a         |n/a     |n/a             |October 31, 2018       |
 +-----------+------------+--------+----------------+-----------------------+
 |releng/10.4|10.4-RELEASE|Normal  |October 3, 2017 |October 31, 2018       |
 +--------------------------------------------------------------------------+
 |stable/11  |n/a         |n/a     |n/a             |September 30, 2021     |
 +-----------+------------+--------+----------------+-----------------------+
 |releng/11.1|11.1-RELEASE|n/a     |July 26, 2017   |September 30, 2018     |
 +-----------+------------+--------+----------------+-----------------------+
 |releng/11.2|11.2-RELEASE|n/a     |June 28, 2018   |11.3-RELEASE + 3 months|
 +--------------------------------------------------+-----------------------+

As a reminder, FreeBSD changed the support model as of 11.0-RELEASE.
For additional information, please see
https://lists.freebsd.org/pipermail/freebsd-announce/2015-February/001624.html

Please refer to https://security.freebsd.org/ for an up-to-date list of
supported releases and the latest security advisories.

- --
The FreeBSD Security Team

Original announcement: https://lists.freebsd.org/pipermail/freebsd-announce/2018-September/001842.html