CVE-2026-35346 — uutils coreutils comm Silent Data Corruption via Lossy UTF-8 Normalization
The comm utility in uutils coreutils silently corrupts data by performing lossy UTF-8 conversion on all output lines. The implementation uses String::from_utf8_lossy(), which re…
Published: 2026-04-22 · CVSS: 3.3 · CVSS 3.1
The comm utility in uutils coreutils silently corrupts data by performing lossy UTF-8 conversion on all output lines. The implementation uses String::from_utf8_lossy(), which replaces invalid UTF-8 byte sequences with the Unicode replacement character (U+FFFD). This behavior differs from GNU comm, which processes raw bytes and preserves the original input. This results in corrupted output when the utility is used to compare binary files or files using non-UTF-8 legacy encodings.
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7