False positive "Could not find bubblewrap on PATH" warning on Ubuntu 22.04 when bwrap is present and successfully executed

What version of Codex CLI is running?

v0.135.0

What subscription do you have?

pro

Which model were you using?

gpt-5.5 xhigh

What platform is your computer?

ubuntu

What terminal emulator and version are you using (if applicable)?

_No response_

Codex doctor report

What issue are you seeing?

Summary

Codex CLI v0.135.0 reports:

Codex could not find bubblewrap on PATH. Install bubblewrap with your OS package manager.
Codex will use the bundled bubblewrap in the meantime.

However, bwrap is installed, available on PATH, and Codex itself successfully executes it.

Environment

• Codex CLI: 0.135.0
• OS: Ubuntu 22.04.3 LTS
• bubblewrap: 0.6.1

$ command -v bwrap
/usr/bin/bwrap

$ bwrap --version
bubblewrap 0.6.1

Verification

Manual bubblewrap test succeeds:

bwrap --ro-bind / / --proc /proc --dev /dev --tmpfs /tmp /bin/sh -c 'echo bwrap-ok'

Output:

bwrap-ok

Evidence from strace

Codex checks and executes /usr/bin/bwrap:

access("/usr/bin/bwrap", X_OK) = 0

execve("/usr/bin/bwrap",
["/usr/bin/bwrap",
 "--unshare-user",
 "--unshare-net",
 "--ro-bind",
 "/",
 "/",
 "/bin/true"],
 ...)

Namespace creation succeeds:

clone(... CLONE_NEWNS|CLONE_NEWUSER|CLONE_NEWNET|SIGCHLD) = <pid>

No obvious EPERM/EACCES failure is present.

Expected behavior

No bubblewrap warning should be shown when:

• /usr/bin/bwrap exists
• access(..., X_OK) succeeds
• Codex successfully executes bwrap

Actual behavior

Codex still displays:

Codex could not find bubblewrap on PATH.

even though the binary is found and executed.

This appears to be a false positive or misleading startup warning.

What steps can reproduce the bug?

.

What is the expected behavior?

_No response_

Additional information

_No response_