CVE-2026-35355

The install utility in uutils coreutils is vulnerable to a Time-of-Check to Time-of-Use (TOCTOU) race condition during file installation. The implementation unlinks an existing destination file and then recreates it using a path-based operation without the O_EXCL flag. A local attacker can exploit the window between the unlink and the subsequent creation to swap the path with a symbolic link, allowing them to redirect privileged writes to overwrite arbitrary system files.

CVSS v3 6.3 MEDIUM

6.3^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 1.0 / Impact : 5.2

Attack Vector LOCAL

Attack Complexity HIGH

Privileges Required LOW

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://github.com/uutils/coreutils/pull/10067	Exploit Issue Tracking Patch
https://github.com/uutils/coreutils/releases/tag/0.6.0	Release Notes
https://github.com/uutils/coreutils/pull/10067	Exploit Issue Tracking Patch

Configurations

Configuration 1 (hide)

cpe:2.3:a:uutils:coreutils:*:*:*:*:*:rust:*:*

History

26 Oct 2026, 21:10

Type	Values Removed	Values Added
Summary		(es) La utilidad install en uutils coreutils es vulnerable a una condición de carrera de tipo Time-of-Check to Time-of-Use (TOCTOU) durante la instalación de archivos. La implementación desvincula un archivo de destino existente y luego lo recrea utilizando una operación basada en ruta sin la bandera O_EXCL. Un atacante local puede explotar la ventana entre la desvinculación y la creación subsiguiente para intercambiar la ruta con un enlace simbólico, permitiéndoles redirigir escrituras privilegiadas para sobrescribir archivos de sistema arbitrarios.

Information

Published : 2026-04-22 17:16

Updated : 2026-10-26 21:10

NVD link : CVE-2026-35355

Mitre link : CVE-2026-35355

CVE.ORG link : CVE-2026-35355

JSON object : View

Products Affected

uutils

coreutils

CWE

CWE-367

Time-of-check Time-of-use (TOCTOU) Race Condition

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