CVE-2026-70461

rsync 3.2.5 before 3.5.0 contains a heap out-of-bounds write vulnerability that allows remote unauthenticated attackers to write one attacker-controlled byte past the end of a heap allocation by supplying a crafted files-from entry. Attackers can trigger the vulnerability against a read-only rsync daemon module by providing a files-from entry containing both an interior and trailing backslash, causing the add_implied_include() function to under-count the trailing backslash when sizing the destination buffer.

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	Product Release Notes
https://github.com/RsyncProject/rsync/security/advisories/GHSA-jhxm-j4mq-3fj4	Vendor Advisory
https://www.vulncheck.com/advisories/rsync-heap-out-of-bounds-write-via-files-from-entry	Release Notes Third Party Advisory

Configurations

Configuration 1 (hide)

cpe:2.3:a:samba:rsync:*:*:*:*:*:*:*:*

History

23 Oct 2026, 18:10

Type	Values Removed	Values Added
Summary		(es) rsync 3.2.5 anterior a 3.5.0 contiene una vulnerabilidad de escritura fuera de límites en el heap que permite a atacantes remotos no autenticados escribir un byte controlado por el atacante más allá del final de una asignación de heap al proporcionar una entrada files-from manipulada. Los atacantes pueden activar la vulnerabilidad contra un módulo de demonio rsync de solo lectura al proporcionar una entrada files-from que contenga tanto una barra invertida interna como una final, lo que hace que la función add_implied_include() subestime la barra invertida final al dimensionar el búfer de destino.

Information

Published : 2026-08-13 15:20

Updated : 2026-10-24 16:10

NVD link : CVE-2026-70461

Mitre link : CVE-2026-70461

CVE.ORG link : CVE-2026-70461

JSON object : View

Products Affected

samba

rsync

CWE

CWE-787

Out-of-bounds Write

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