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Vulnerability · Published Apr 22, 2026 · Assigned by canonical

CVE-2026-35375uutils coreutils split Local Data Integrity Issue via Lossy Filename Encoding

Low 3.3

In plain English

A low-severity security flaw in coreutils from Uutils. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.1% (higher than 4% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)3.3Low
Exploit odds (30 days)0.1%top 96.4% of all CVEs
Exploited in the wildNo reportsCISA SSVC: poc
Attack toolingNoneno public tooling known

Official description

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.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
Debian:12rust-coreutilsno fix listedDEBIAN-CVE-2026-35375
Debian:13rust-coreutilsno fix listedDEBIAN-CVE-2026-35375
Debian:14rust-coreutils0.8.0-1DEBIAN-CVE-2026-35375
Ubuntu:24.04:LTSrust-coreutilsno fix listedUBUNTU-CVE-2026-35375
Ubuntu:25.10rust-coreutilsno fix listedUBUNTU-CVE-2026-35375

Affected products (as reported)

VendorProductVersions
Uutils coreutils 0 – before 0.8.0

Weakness: CWE-176 · Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N

References