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[BUG] Claude Code crashes with 100%+ CPU usage on ARM (v2.1.27) #22141
Description
Preflight Checklist
- I have searched existing issues and this hasn't been reported yet
- This is a single bug report (please file separate reports for different bugs)
- I am using the latest version of Claude Code
What's Wrong?
I'm using Ubuntu Linux on ARM. Previously, the Claude Code CLI was using 50% CPU, but now it's using over 100%, and the OS kills the process. This happens even with a basic prompt like "hello" - it freezes with 100%+ CPU and then crashes. It was working fine in version 2.1.25, so I've downgraded to that version.
What Should Happen?
Claude Code should not use so much CPU. The performance should be as good as 2.1.25.
Error Messages/Logs
Steps to Reproduce
- launch
claude - type "hello" in the message area.
topcommand shows 100% cpu usage, then after a minute or so the OS kills the process.
Claude Model
Not sure / Multiple models
Is this a regression?
Yes, this worked in a previous version
Last Working Version
2.1.25
Claude Code Version
2.1.25
Platform
Anthropic API
Operating System
Ubuntu/Debian Linux
Terminal/Shell
Non-interactive/CI environment
Additional Information
No response
Activity
github-actions commentedon Jan 31, 2026
Found 3 possible duplicate issues:
This issue will be automatically closed as a duplicate in 3 days.
🤖 Generated with Claude Code
codemile commentedon Jan 31, 2026
workaround: #22103 (comment)
github-actions commentedon Feb 8, 2026
This issue has been automatically locked since it was closed and has not had any activity for 7 days. If you're experiencing a similar issue, please file a new issue and reference this one if it's relevant.