HomeAssistant Instant Crash on Update 2026.5.0

[Flibbmaster]

The problem

Trying to update the Core to 2026.5.0. HomeAssistant instantly crashes and reboots.
Already tried to update via CLI, also booted to safe mode to disable custom integrations. Always the same effect. System is running in VirtualBox on a Mac Mini M4.
HA-OS Update to 17.3 was successful before. I posted the full Supervisor-Log from the time i pressed "update" below. Host-Log has no entries for that time.
Anyone has an idea what is causing the crash here?

From the Supervisor-Logs i see a lot of API-Errors, starting with shutdown of the MusicAssistant:
2026-05-07 18:10:03.070 INFO (MainThread) [supervisor.api.proxy] [d5369777_music_assistant] Home Assistant WebSocket API closed

Afterwards there are a lot of errors regarding API:
2026-05-07 18:10:25.354 WARNING (MainThread) [supervisor.homeassistant.websocket] Can't send WebSocket command: Can't connect to Home Assistant Core WebSocket, the API is not reachable

Ending with:
2026-05-07 18:10:36.368 ERROR (MainThread) [supervisor.homeassistant.core] Home Assistant has crashed!

What version of Home Assistant Core has the issue?

2026.5.0

What was the last working version of Home Assistant Core?

2026.4.4

What type of installation are you running?

Home Assistant OS

Integration causing the issue

No response

Link to integration documentation on our website

No response

Diagnostics information

No response

Example YAML snippet

Anything in the logs that might be useful for us?

2026-05-07 18:10:00.145 INFO (MainThread) [supervisor.homeassistant.core] Updating Home Assistant to version 2026.5.0
2026-05-07 18:10:00.145 INFO (MainThread) [supervisor.docker.interface] Updating image ghcr.io/home-assistant/qemuarm-64-homeassistant:2026.4.4 to ghcr.io/home-assistant/qemuarm-64-homeassistant:2026.5.0
2026-05-07 18:10:00.915 INFO (MainThread) [supervisor.docker.interface] Downloading docker image ghcr.io/home-assistant/qemuarm-64-homeassistant with tag 2026.5.0.
2026-05-07 18:10:03.010 INFO (MainThread) [supervisor.docker.manager] Stopping homeassistant application
2026-05-07 18:10:03.070 INFO (MainThread) [supervisor.api.proxy] [d5369777_music_assistant] Home Assistant WebSocket API closed
2026-05-07 18:10:25.354 WARNING (MainThread) [supervisor.homeassistant.websocket] Can't send WebSocket command: Can't connect to Home Assistant Core WebSocket, the API is not reachable
2026-05-07 18:10:25.360 WARNING (MainThread) [supervisor.homeassistant.websocket] Can't send WebSocket command: Can't connect to Home Assistant Core WebSocket, the API is not reachable
2026-05-07 18:10:31.154 INFO (MainThread) [supervisor.docker.manager] Cleaning homeassistant application
2026-05-07 18:10:31.241 WARNING (MainThread) [supervisor.homeassistant.websocket] Can't send WebSocket command: Can't connect to Home Assistant Core WebSocket, the API is not reachable
2026-05-07 18:10:31.241 WARNING (MainThread) [supervisor.homeassistant.websocket] Can't send WebSocket command: Can't connect to Home Assistant Core WebSocket, the API is not reachable
2026-05-07 18:10:31.241 WARNING (MainThread) [supervisor.homeassistant.websocket] Can't send WebSocket command: Can't connect to Home Assistant Core WebSocket, the API is not reachable
2026-05-07 18:10:31.246 INFO (MainThread) [supervisor.homeassistant.module] Update pulse/client.config: /data/tmp/homeassistant_pulse
2026-05-07 18:10:31.247 WARNING (MainThread) [supervisor.homeassistant.websocket] Can't send WebSocket command: Can't connect to Home Assistant Core WebSocket, the API is not reachable
2026-05-07 18:10:31.247 WARNING (MainThread) [supervisor.homeassistant.websocket] Can't send WebSocket command: Can't connect to Home Assistant Core WebSocket, the API is not reachable
2026-05-07 18:10:31.247 WARNING (MainThread) [supervisor.homeassistant.websocket] Can't send WebSocket command: Can't connect to Home Assistant Core WebSocket, the API is not reachable
2026-05-07 18:10:31.363 INFO (MainThread) [supervisor.docker.homeassistant] Starting Home Assistant ghcr.io/home-assistant/qemuarm-64-homeassistant with version 2026.5.0
2026-05-07 18:10:31.363 INFO (MainThread) [supervisor.homeassistant.core] Wait until Home Assistant is ready
2026-05-07 18:10:31.364 WARNING (MainThread) [supervisor.homeassistant.websocket] Can't send WebSocket command: Can't connect to Home Assistant Core WebSocket, the API is not reachable
2026-05-07 18:10:34.665 WARNING (MainThread) [supervisor.homeassistant.websocket] Can't send WebSocket command: Can't connect to Home Assistant Core WebSocket, the API is not reachable
2026-05-07 18:10:36.368 ERROR (MainThread) [supervisor.homeassistant.core] Home Assistant has crashed!
2026-05-07 18:10:36.369 CRITICAL (MainThread) [supervisor.homeassistant.core] HomeAssistant update failed -> rollback!
2026-05-07 18:10:36.372 INFO (MainThread) [supervisor.resolution.module] Create new issue update_rollback - core / None
2026-05-07 18:10:36.374 INFO (MainThread) [supervisor.homeassistant.core] Updating Home Assistant to version 2026.4.4
2026-05-07 18:10:36.374 INFO (MainThread) [supervisor.docker.interface] Updating image ghcr.io/home-assistant/qemuarm-64-homeassistant:2026.5.0 to ghcr.io/home-assistant/qemuarm-64-homeassistant:2026.4.4
2026-05-07 18:10:36.377 WARNING (MainThread) [supervisor.homeassistant.websocket] Can't send WebSocket command: Can't connect to Home Assistant Core WebSocket, the API is not reachable
2026-05-07 18:10:36.378 WARNING (MainThread) [supervisor.homeassistant.websocket] Can't send WebSocket command: Can't connect to Home Assistant Core WebSocket, the API is not reachable
2026-05-07 18:10:36.378 WARNING (MainThread) [supervisor.homeassistant.websocket] Can't send WebSocket command: Can't connect to Home Assistant Core WebSocket, the API is not reachable
2026-05-07 18:10:36.379 WARNING (MainThread) [supervisor.homeassistant.websocket] Can't send WebSocket command: Can't connect to Home Assistant Core WebSocket, the API is not reachable
2026-05-07 18:10:37.295 INFO (MainThread) [supervisor.docker.interface] Downloading docker image ghcr.io/home-assistant/qemuarm-64-homeassistant with tag 2026.4.4.
2026-05-07 18:10:39.039 INFO (MainThread) [supervisor.docker.manager] Cleaning homeassistant application
2026-05-07 18:10:39.039 WARNING (MainThread) [supervisor.homeassistant.websocket] Can't send WebSocket command: Can't connect to Home Assistant Core WebSocket, the API is not reachable
2026-05-07 18:10:39.049 WARNING (MainThread) [supervisor.homeassistant.websocket] Can't send WebSocket command: Can't connect to Home Assistant Core WebSocket, the API is not reachable
2026-05-07 18:10:39.049 WARNING (MainThread) [supervisor.homeassistant.websocket] Can't send WebSocket command: Can't connect to Home Assistant Core WebSocket, the API is not reachable
2026-05-07 18:10:39.049 WARNING (MainThread) [supervisor.homeassistant.websocket] Can't send WebSocket command: Can't connect to Home Assistant Core WebSocket, the API is not reachable
2026-05-07 18:10:39.051 INFO (MainThread) [supervisor.homeassistant.module] Update pulse/client.config: /data/tmp/homeassistant_pulse
2026-05-07 18:10:39.052 WARNING (MainThread) [supervisor.homeassistant.websocket] Can't send WebSocket command: Can't connect to Home Assistant Core WebSocket, the API is not reachable
2026-05-07 18:10:39.052 WARNING (MainThread) [supervisor.homeassistant.websocket] Can't send WebSocket command: Can't connect to Home Assistant Core WebSocket, the API is not reachable
2026-05-07 18:10:39.052 WARNING (MainThread) [supervisor.homeassistant.websocket] Can't send WebSocket command: Can't connect to Home Assistant Core WebSocket, the API is not reachable
2026-05-07 18:10:39.153 INFO (MainThread) [supervisor.docker.homeassistant] Starting Home Assistant ghcr.io/home-assistant/qemuarm-64-homeassistant with version 2026.4.4
2026-05-07 18:10:39.153 INFO (MainThread) [supervisor.homeassistant.core] Wait until Home Assistant is ready
2026-05-07 18:10:39.155 WARNING (MainThread) [supervisor.homeassistant.websocket] Can't send WebSocket command: Can't connect to Home Assistant Core WebSocket, the API is not reachable
2026-05-07 18:10:41.287 INFO (MainThread) [supervisor.resolution.evaluate] Starting system evaluation with state running
2026-05-07 18:10:41.327 INFO (MainThread) [supervisor.resolution.evaluate] System evaluation complete
2026-05-07 18:10:44.170 INFO (MainThread) [supervisor.homeassistant.api] Connected to Core via TCP http://172.30.32.1:8123
2026-05-07 18:10:44.170 INFO (MainThread) [supervisor.homeassistant.core] Home Assistant Core state changed to APIState(core_state='NOT_RUNNING', offline_db_migration=False)
2026-05-07 18:10:44.668 WARNING (MainThread) [supervisor.homeassistant.websocket] Can't send WebSocket command: Can't connect to Home Assistant Core WebSocket, the API is not reachable
2026-05-07 18:12:26.654 INFO (MainThread) [supervisor.homeassistant.core] Home Assistant Core state changed to APIState(core_state='RUNNING', offline_db_migration=False)
2026-05-07 18:12:26.654 INFO (MainThread) [supervisor.homeassistant.core] Detect a running Home Assistant instance
2026-05-07 18:12:26.655 INFO (MainThread) [supervisor.homeassistant.core] Successfully started Home Assistant 2026.4.4
2026-05-07 18:14:08.119 INFO (MainThread) [supervisor.api.proxy] Home Assistant WebSocket API request initialize
2026-05-07 18:14:08.121 INFO (MainThread) [supervisor.api.proxy] WebSocket access from d5369777_music_assistant
2026-05-07 18:14:08.126 INFO (MainThread) [supervisor.api.proxy] [d5369777_music_assistant] Home Assistant WebSocket API proxy running

Additional information

No response

[Flibbmaster]

Issue (whatever it was) is fixed in 2026.5.1

[jonasman]

now 2026.5.3 is crashing and rolling back to 2026.5.2

[cmonard]

now 2026.5.3 is crashing and rolling back to 2026.5.2

Same here with 2026.5.3.
I will need to downgrade too I guess

[WhatHowLLC]

This issue might need to be reopened. I hope this information is helpful in that regard. This is my first posting, so pardon me if I do it incorrectly.

I may be able add a few data points that may help narrow it down....

Environment

• Home Assistant OS 17.3, Supervisor 2026.05.1 (agent 1.8.1, Docker 29.3.1)
• Board generic-aarch64, image ghcr.io/home-assistant/qemuarm-64-homeassistant
• Running in VirtualBox on an Apple Silicon Mac (Mac mini M2 Pro, circa 2023, 16 GB)
• Last working Core: 2026.6.1 (Python 3.14.5) — fails updating to 2026.6.2
• Prior HAOS 17.3 update applied fine; this is the Core 2026.6.1 → 2026.6.2 step.

This matches the original report exactly (VirtualBox on Apple Silicon, qemuarm-64), so it doesn't look version-specific to 2026.5.0 — it's recurring on newer Core point releases.

Behavior: the freshly-pulled 2026.6.2 container starts, then crashes ~5 seconds later and Supervisor auto-rolls back to 2026.6.1 (works as designed). I reproduced it three times in a row; identical every time. Updating via the CLI (ha core update --version 2026.6.2) gives the same result.

Supervisor log (one representative cycle):

08:28:33 [supervisor.homeassistant.core] Updating Home Assistant to version 2026.6.2
08:28:33 [supervisor.docker.interface] Updating image ...qemuarm-64-homeassistant:2026.6.1 to ...:2026.6.2
08:28:55 [supervisor.docker.homeassistant] Starting Home Assistant ...qemuarm-64-homeassistant with version 2026.6.2
08:28:55 [supervisor.homeassistant.core] Wait until Home Assistant is ready
08:29:00 ERROR    [supervisor.homeassistant.core] Home Assistant has crashed!
08:29:00 CRITICAL [supervisor.homeassistant.core] HomeAssistant update failed -> rollback!
08:29:00 [supervisor.homeassistant.core] Updating Home Assistant to version 2026.6.1
... rolls back, 2026.6.1 RUNNING again ~20s later

Two things that may help diagnose:

1. The crash is silent. The crashed 2026.6.2 container emits nothing to the systemd journal (no home-assistant.log, no stdout/stderr captured), and there is no kernel segfault/trap on the host either. There is no Python traceback anywhere I can find. The process just exits a few seconds in.

2. It dies in the bootstrap phase, before integrations load. From the host journal, the crashed 2026.6.2 container scopes consumed only ~1.3–1.4 s CPU and ~150–177 MB RAM before exiting, versus ~1.1 GB for a healthy 2026.6.1 boot. So it's failing very early in startup, not while setting up integrations. Ruled out on my end: disk (Supervisor free-space check passes, ~11.5 GB free), OOM (nowhere near a memory ceiling), and config/custom integrations (the prior reporter already confirmed safe-mode makes no difference).

This is a silent, sub-2-second native exit with no traceback and no kernel fault — only under VirtualBox on Apple Silicon. Happy to capture docker logs on the exited container if someone can suggest a reliable way to grab it before Supervisor cleans it up.