🛡️ CVE-2026-35375 — coreutils

🟢 CVSS 2.0 — Low ⚠️ Exploit Public CWE-176 OSV

2.0

CVSS Score

0 Low4 Medium7 High9 Critical10

Description

uutils coreutils has an Improper Handling of Unicode Encoding Issue

A logic error in the split utility of uutils coreutils causes the corruption of output filenames when provided with non-UTF-8 prefix or suffix inputs. The implementation utilizes to_string_lossy() when constructing chunk filenames, which automatically rewrites invalid byte sequences into the UTF-8 replacement character (U+FFFD). This behavior diverges from GNU split, which preserves raw pathname bytes intact. In environments utilizing non-UTF-8 encodings, this vulnerability leads to the creation of files with incorrect names, potentially causing filename collisions, broken automation, or the misdirection of output data.

How this vulnerability can be exploited

This issue can be reached with local access to the system, attack complexity is low, an attacker needs low-level privileges on the target. No user interaction is required. The scope is unchanged, so the impact stays within the vulnerable component. Rated impact: confidentiality none, integrity low, availability none.

Weakness class

CVE-2026-35375 is classified as CWE-176: Improper Handling of Unicode Encoding. The product does not properly handle when an input contains Unicode encoding.

Affected software

CVE-2026-35375 is recorded against 1 package.

coreutils

Timeline and source

Published on 22 April 2026 and last revised on 17 June 2026. A public exploit is known to exist, which raises the urgency of patching considerably. A vendor advisory or fix has been published. Record sourced from OSV.

References

nvd.nist.gov (Advisory)
github.com (Web)
github.com (Web)
github.com (Package)
github.com (Web)

CVE-2026-35375 on other distributions

Each distribution ships its own build and its own fixed version. Pick the one you run:

Debian Ubuntu

Details

Severity LOW

CVSS Score 2.0

CVSS Vector CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N

CWE CWE-176

Public Exploit ⚠️ Yes

Source OSV

Published 2026-04-22

Updated 2026-08-20

Modified 2026-06-17

Fix URL https://github.com/uutils/coreutils/pull/11397

Affected Packages

Software	From version	Fixed in
coreutils	—	—

References

ADVISORY https://nvd.nist.gov/vuln/detail/CVE-2026-35375

WEB https://github.com/uutils/coreutils/pull/11397

WEB https://github.com/uutils/coreutils/commit/d2b9550fe821a9a10bf0cec057509211357363f1

PACKAGE https://github.com/uutils/coreutils

WEB https://github.com/uutils/coreutils/releases/tag/0.8.0

🔗 NVD 🔗 Mitre ✅ Fix / Advisory

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