So this email from the Hurd developers just came through about recent GNU/Hurd
vunerabilities.  :)

-------- Forwarded message -------
From: "Samuel Thibault" <sthibault@debian.org>
To: debian-hurd@lists.debian.org, hurd-bug@gnu.org
Sent: August 9, 2021 10:04 PM
Subject: Hurd Security vulnerabilities, please upgrade!
Hello,

In the past months, Sergey Bugaev has been working on fixing some
Hurd security vulnerabilities. This is now fixed in the latest Debian
packages, so please upgrade and reboot!

hurd >= 1:0.9.git20210404-9
libc0.3 >= 2.31-13+hurd.1
gnumach-image-1.8-* >= 2:1.8+git20210809-1

(A libc0.3 2.31-13+hurd.2 upload will also happen tomorrow, but that
will only be intended to fix builds)

Samuel