uutils coreutils EUVD-2026-24978

| CVE-2026-35346 LOW
Improper Handling of Unicode Encoding (CWE-176)
2026-04-22 canonical GHSA-hwhf-8p2f-45wr
Information Disclosure Coreutils
3.3
CVSS 3.1

CVSS VectorNVD

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
Attack Vector
Local
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
Low
Availability
None

Lifecycle Timeline

1
Analysis Generated
Apr 23, 2026 - 00:18 vuln.today

DescriptionNVD

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.

AnalysisAI

The comm utility in uutils coreutils silently corrupts binary and non-UTF-8 encoded file output by replacing invalid UTF-8 byte sequences with the Unicode replacement character (U+FFFD), diverging from GNU comm's byte-preserving behavior. This affects any user comparing files with legacy encodings or binary content, resulting in data integrity loss. …

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EUVD-2026-24978 vulnerability details – vuln.today
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