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Title: posixmodule: fd_and_follow_symlinks_invalid lets fd be 0 · Issue #144023 · python/cpython · GitHub

Open Graph Title: posixmodule: fd_and_follow_symlinks_invalid lets fd be 0 · Issue #144023 · python/cpython

X Title: posixmodule: fd_and_follow_symlinks_invalid lets fd be 0 · Issue #144023 · python/cpython

Description: Bug report Bug description: fd_and_follow_symlinks_invalid does not trigger an error is fd is 0 and followsymlinks is false CPython versions tested on: CPython main branch Operating systems tested on: macOS Linked PRs gh-144022

Open Graph Description: Bug report Bug description: fd_and_follow_symlinks_invalid does not trigger an error is fd is 0 and followsymlinks is false CPython versions tested on: CPython main branch Operating systems tested ...

X Description: Bug report Bug description: fd_and_follow_symlinks_invalid does not trigger an error is fd is 0 and followsymlinks is false CPython versions tested on: CPython main branch Operating systems tested ...

Opengraph URL: https://github.com/python/cpython/issues/144023

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posixmodule: fd_and_follow_symlinks_invalid lets fd be 0https://github.com/python/cpython/issues/144023#top
extension-modulesC modules in the Modules dirhttps://github.com/python/cpython/issues?q=state%3Aopen%20label%3A%22extension-modules%22
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on Jan 19, 2026https://github.com/python/cpython/issues/144023#issue-3828107320
gh-144023: prevent follow_symlinks from being allowed with an fd of 0 #144022https://github.com/python/cpython/pull/144022
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