Vulnerability Details CVE-2026-35346
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.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.0
EPSS Ranking 1.3%
CVSS Severity
CVSS v3 Score 3.3
References