systemd 262 ships with breaking changes to notify-reload services, TPM-sealed credentials, and the udevd control socket

Sources: primary, coverage
Summary: The v262 release notes on the systemd repository list breaking changes in three places: services using notify-reload, TPM-sealed credentials, and the udevd control socket. Phoronix covered the release on 2026-09-22. It is an upstream release, so the operational effect arrives when distributions pick it up rather than on the day it was tagged.
Why it matters: All three breaks sit under something that runs at boot or during a service reload, which is where an incompatibility shows up as a host that does not come back.
Follow-up: Which distribution releases carry systemd 262, and whether the notify-reload change requires unit file edits.