CVE-2026-70462

rsync 3.1.0 before 3.5.0 contains a signed integer overflow vulnerability in the I/O timeout implementation that allows attackers to permanently disable connection timeouts by injecting MSG_IO_TIMEOUT messages carrying non-positive (zero or negative) values. Attackers can craft malicious MSG_IO_TIMEOUT messages that cause the timeout variable to wrap to a non-positive value, preventing the timeout check from firing and enabling idle or stalled connections to hold daemon slots indefinitely, leading to resource exhaustion.

CVSS v3 6.5 MEDIUM

6.5^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 2.8 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction REQUIRED

Confidentiality Impact NONE

Integrity Impact NONE

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-j9wh-5jmp-2m64
https://www.vulncheck.com/advisories/rsync-signed-integer-overflow-via-msg-io-timeout

Configurations

No configuration.

History

23 Oct 2026, 18:10

Type	Values Removed	Values Added
Summary		(es) rsync 3.1.0 anterior a 3.5.0 contiene una vulnerabilidad de desbordamiento de entero con signo en la implementación del tiempo de espera de E/S que permite a los atacantes deshabilitar permanentemente los tiempos de espera de conexión inyectando mensajes MSG_IO_TIMEOUT que transportan valores no positivos (cero o negativos). Los atacantes pueden crear mensajes MSG_IO_TIMEOUT maliciosos que hacen que la variable de tiempo de espera se ajuste a un valor no positivo, impidiendo que se active la comprobación del tiempo de espera y permitiendo que las conexiones inactivas o estancadas mantengan ranuras de demonio indefinidamente, lo que lleva al agotamiento de recursos.

Information

Published : 2026-08-13 15:20

Updated : 2026-10-24 15:10

NVD link : CVE-2026-70462

Mitre link : CVE-2026-70462

CVE.ORG link : CVE-2026-70462

JSON object : View

Products Affected

No product.

CWE

CWE-190

Integer Overflow or Wraparound

CWE-835

Loop with Unreachable Exit Condition ('Infinite Loop')

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