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CVE-2026-59676 is a local time-of-check time-of-use race condition in the seunshare utility in SELinux policycoreutils through version 3.10. The flaw is in the recursive cleanup routine rm_rf(), which uses openat() during directory traversal without O_NOFOLLOW despite the routine intending not to follow symbolic links. An attacker can race the recursive deletion logic by replacing a directory entry with a symbolic link between checks and use, causing the privileged cleanup path to operate on unintended filesystem targets. When seunshare is installed setuid-root and invoked by a user running in the unconfined SELinux domain, this can result in deletion of arbitrary root-owned files. The issue was fixed upstream in SELinux userspace utilities version 3.11.
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A local privilege/authorization bypass issue in PortProtonQt's insecure custom Polkit rule that allows arbitrary local users to modify NetworkManager connections and mount or unmount file systems via UDisks2 by faking or racing process command-line checks.
A local file deletion vulnerability in seunshare’s rm_rf() cleanup routine caused by unsafe openat() usage without O_NOFOLLOW, enabling a symlink race that can delete arbitrary root-owned files under certain conditions.
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Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.