[BUG] aarch64 linux (al2023) bash tool process spawning completely broken

Preflight Checklist

• [x] I have searched existing issues and this hasn't been reported yet
• [x] This is a single bug report (please file separate reports for different bugs)
• [x] I am using the latest version of Claude Code

What's Wrong?

Bash tool times out, never spawns a child process (strace shows only CLONE_THREAD, no execve)

What Should Happen?

the prompt "ls the current directory" should print the ls output

Error Messages/Logs

it hangs indefinitely

Steps to Reproduce

--bare, --dangerously-skip-permissions, CLAUDE_CODE_DISABLE_SANDBOX=1, removing hooks — none help

Claude Model

Opus

Is this a regression?

I don't know

Last Working Version

_No response_

Claude Code Version

2.1.81

Platform

AWS Bedrock

Operating System

Other Linux

Terminal/Shell

iTerm2

Additional Information

• Platform: aarch64 (Graviton), Amazon Linux 2023, kernel 6.1.163
• Not affected: Node.js child_process.execSync works fine on the same system
• No landlock kernel support (/sys/kernel/security/landlock/abi_version doesn't exist)