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CVE-2026-78422: Polkit Unix Process Unsigned Uidcve-2026-78422-polkit-unix-process-unsigned-uid

Polkit's `unix-process` subject specification requires the `uid` field to be a signed 32-bit integer (`i32`, D-Bus type `i`). Passing an unsigned integer or converting `uid` without casting to `i32` causes Polkit to silently discard the UID and fall back to a racy `/proc` PID lookup, enabling PID reuse authorization bypasses (CVE-2026-78422).

RustCVE-2026-78422CWE-362CWE-704CWE-863
by Provallyupdated 2026-09-02Apache-2.0
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