CVE-2026-70458

rsync 3.0.0 before 3.5.0 contains an out-of-bounds write vulnerability that allows attackers to corrupt memory by triggering HLINK_BUMP processing on file entries with the FLAG_HLINKED flag set while the hard-link preservation option is inactive. Attackers can exploit the missing F_SUM field in the file_struct layout to access memory past the end of the allocated structure, corrupting adjacent heap or stack data.

CVSS v3 8.2 HIGH

8.2^/10

CVSS v3 : HIGH

Vector :

Exploitability : 3.9 / Impact : 4.2

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact LOW

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://github.com/RsyncProject/rsync/releases/tag/v3.5.0
https://github.com/RsyncProject/rsync/security/advisories/GHSA-gg3m-4m9m-268h
https://www.vulncheck.com/advisories/rsync-out-of-bounds-write-via-flag-hlinked-handling

Configurations

No configuration.

History

23 Oct 2026, 18:10

Type	Values Removed	Values Added
Summary		(es) rsync 3.0.0 anterior a 3.5.0 contiene una vulnerabilidad de escritura fuera de límites que permite a los atacantes corromper la memoria al activar el procesamiento HLINK_BUMP en entradas de archivo con la bandera FLAG_HLINKED establecida mientras la opción de preservación de enlaces duros está inactiva. Los atacantes pueden explotar el campo F_SUM faltante en el diseño de file_struct para acceder a la memoria más allá del final de la estructura asignada, corrompiendo datos adyacentes del heap o de la pila.

Information

Published : 2026-08-13 15:19

Updated : 2026-10-24 16:10

NVD link : CVE-2026-70458

Mitre link : CVE-2026-70458

CVE.ORG link : CVE-2026-70458

JSON object : View

Products Affected

No product.

CWE

CWE-787

Out-of-bounds Write

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