codex CLI crashes in xterm
Open 💬 0 comments Opened Mar 17, 2026 by mahendra202602
What version of Codex CLI is running?
v0.112.0
What subscription do you have?
Corporate Subscription
Which model were you using?
gpt-5.4, gpt-5.3-codex
What platform is your computer?
Linux 5.15.0-316.196.4.1.el8uek.x86_64 x86_64 x86_64
What terminal emulator and version are you using (if applicable)?
xterm
What issue are you seeing?
codex CLI is crashing for multiple users in our org when run inside xterm.
During normal codex usage, xterm exits with the following error:
xterm: warning, error event received:
X Error of failed request: BadValue (integer parameter out of range for
operation)
Major opcode of failed request: 91 (X_QueryColors)
Value in failed request: 0xffffffff
Serial number of failed request: 96762
Current serial number in output stream: 96762
What steps can reproduce the bug?
- Launch a standard xterm session with default color-operation behavior
enabled.
- Start the codex CLI.
- Use the CLI normally until the crash occurs. Users report this happens
during regular interactive usage in xterm.
What is the expected behavior?
_No response_
Additional information
This is impacting multiple users.