CVE-2026-70456

rsync 3.0.1 before 3.5.0 contains an out-of-bounds write vulnerability in the read_args() function that allows a malicious sender to corrupt adjacent heap memory by sending a crafted argument list. When the argument count causes the argv allocation to be exactly full, the trailing NULL terminator is written one slot beyond the allocation boundary, corrupting adjacent heap memory.

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-78jc-79jv-v6rw
https://www.vulncheck.com/advisories/rsync-heap-out-of-bounds-write-via-read-args

Configurations

No configuration.

History

23 Oct 2026, 18:10

Type	Values Removed	Values Added
Summary		(es) rsync 3.0.1 antes de 3.5.0 contiene una vulnerabilidad de escritura fuera de límites en la función read_args() que permite a un remitente malicioso corromper la memoria adyacente del heap mediante el envío de una lista de argumentos manipulada. Cuando el recuento de argumentos hace que la asignación de argv esté exactamente llena, el terminador NULL final se escribe una ranura más allá del límite de asignación, corrompiendo la memoria adyacente del heap.

Information

Published : 2026-08-13 15:19

Updated : 2026-10-24 16:10

NVD link : CVE-2026-70456

Mitre link : CVE-2026-70456

CVE.ORG link : CVE-2026-70456

JSON object : View

Products Affected

No product.

CWE

CWE-787

Out-of-bounds Write

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