CVE-2026-35357

The cp utility in uutils coreutils is vulnerable to an information disclosure race condition. Destination files are initially created with umask-derived permissions (e.g., 0644) before being restricted to their final mode (e.g., 0600) later in the process. A local attacker can race to open the file during this window; once obtained, the file descriptor remains valid and readable even after the permissions are tightened, exposing sensitive or private file contents.

CVSS v3 4.7 MEDIUM

4.7^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 1.0 / Impact : 3.6

Attack Vector LOCAL

Attack Complexity HIGH

Privileges Required LOW

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact NONE

Availability Impact NONE

Scope UNCHANGED

References

Link	Resource
https://github.com/uutils/coreutils/issues/10011	Exploit Issue Tracking Vendor Advisory
https://github.com/uutils/coreutils/issues/10011	Exploit Issue Tracking Vendor Advisory

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 cp en uutils coreutils es vulnerable a una condición de carrera de revelación de información. Los archivos de destino se crean inicialmente con permisos derivados de umask (p. ej., 0644) antes de ser restringidos a su modo final (p. ej., 0600) posteriormente en el proceso. Un atacante local puede competir para abrir el archivo durante esta ventana; una vez obtenido, el descriptor de archivo permanece válido y legible incluso después de que los permisos se endurezcan, exponiendo el contenido de archivos sensibles o privados.

Information

Published : 2026-04-22 17:16

Updated : 2026-10-26 21:10

NVD link : CVE-2026-35357

Mitre link : CVE-2026-35357

CVE.ORG link : CVE-2026-35357

JSON object : View

Products Affected

uutils

coreutils

CWE

CWE-367

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

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