CVE-2026-53794

rsync before 3.5.0 contains a logic error in --max-alloc handling that allows a sender or configuration setting --max-alloc=0 to disable allocation sanity checks entirely rather than enforcing a zero-byte cap. Attackers can exploit this flaw to cause the receiver to attempt unbounded memory allocations for file list and data structures, potentially exhausting available memory and causing a denial of service.

CVSS v3 5.3 MEDIUM

5.3^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 3.9 / Impact : 1.4

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact LOW

Scope UNCHANGED

References

Link	Resource
https://github.com/RsyncProject/rsync/releases/tag/v3.5.0
https://github.com/RsyncProject/rsync/security/advisories/GHSA-p827-vwcp-m964
https://www.vulncheck.com/advisories/rsync-denial-of-service-via-max-alloc-0-logic-error

Configurations

No configuration.

History

23 Oct 2026, 18:10

Type	Values Removed	Values Added
Summary		(es) rsync anterior a la versión 3.5.0 contiene un error lógico en el manejo de --max-alloc que permite que un remitente o una configuración que establece --max-alloc=0 desactive por completo las comprobaciones de cordura de asignación en lugar de imponer un límite de cero bytes. Los atacantes pueden explotar esta falla para hacer que el receptor intente asignaciones de memoria ilimitadas para la lista de archivos y las estructuras de datos, agotando potencialmente la memoria disponible y causando una denegación de servicio.

Information

Published : 2026-08-13 15:19

Updated : 2026-10-24 16:10

NVD link : CVE-2026-53794

Mitre link : CVE-2026-53794

CVE.ORG link : CVE-2026-53794

JSON object : View

Products Affected

No product.

CWE

CWE-1284

Improper Validation of Specified Quantity in Input

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