### The problem
I am experiencing a significant memory leak since upgrading fro…m version 2025.8.3. The memory usage of the Home Assistant container steadily increases over time, eventually leading to instability and requiring a container restart.
Version 2025.8.3 was perfectly stable with no memory growth issues. The problem started immediately after upgrading to version 2025.9.4 and persists in the latest beta, 2025.10.0.b2.
I have enabled the profiler integration, and it consistently reports memory growth in what appear to be core components. The logs are provided below.
Error messages in log section of home assistant:
INFO: Home Assistant Core finish process received signal 11
INFO: Home Assistant Core finish process exit code 256
### What version of Home Assistant Core has the issue?
core-2025.10.0.b2 (also present in core-2025.9.4)
### What was the last working version of Home Assistant Core?
core-2025.8.3
### What type of installation are you running?
Home Assistant Container
### Integration causing the issue
The profiler logs suggest the leak is in the Core components, not a specific integration.
### Link to integration documentation on our website
_No response_
### Diagnostics information
_No response_
### Example YAML snippet
```yaml
```
### Anything in the logs that might be useful for us?
```txt
Yes, logs from the profiler integration show consistent memory growth.
Logger: homeassistant.components.profiler
Source: components/profiler/__init__.py:487
integration: Profiler (documentation, issues)
Memory Growth: [('list', 84289, 20), ('hamt', 69, 1), ('hamt_bitmap_node', 70, 1), ('Script', 118, 1), ('TimerHandle', 203, 1)]
Memory Growth: [('Script', 119, 1)]
Memory Growth: [('_ThreadHandle', 34, 2), ('Thread', 24, 2), ('Empty', 20, 2), ('traceback', 35, 2), ('function', 153862, 1), ('cell', 83236, 1), ('Condition', 78, 1), ('lock', 143, 1)]
Memory Growth: [('cell', 83254, 18), ('function', 153865, 3), ('builtin_function_or_method', 15985, 2), ('CIMultiDict', 162, 2), ('Task', 43, 1), ('HassClientResponse', 5, 1), ('RequestInfo', 5, 1), ('TimeoutHandle', 4, 1), ('_GatheringFuture', 2, 1), ('_BaseRequestContextManager', 2, 1), ('ReceiveMessage', 237, 1), ('JsonPayload', 1, 1), ('BaseCookie', 1, 1), ('ClientRequest', 1, 1)]
```
### Additional information
The behavior strongly suggests a regression was introduced after version 2025.8.3. I have downgraded back to 2025.8.3 for now to maintain a stable system.
Please let me know if any further diagnostics would be helpful. Thank you for your work on this project!
<img width="1132" height="794" alt="Image" src="https://github.com/user-attachments/assets/64737e91-642a-4335-9bf2-8d650cbe13fc" />
<img width="3072" height="721" alt="Image" src="https://github.com/user-attachments/assets/1815c0d0-c580-4c77-8cdc-827f56a0066e" />