CVE-2026-35366: The printenv utility in uutils coreutils fails to display environment variables containing invalid UTF-8 byte sequences.

A bug in uutils coreutils (a set of basic Unix utilities) causes the printenv tool to silently skip environment variables (settings that programs use) containing invalid UTF-8 byte sequences (non-standard character encodings), rather than displaying them. This allows attackers to hide malicious environment variables like LD_PRELOAD (which can inject libraries into programs) from administrators and security tools that rely on printenv to inspect the system.