CVE-2026-109679

5.3Medium

Published 13 Oct 2026 · NVD status: Undergoing Analysis · AI triage by gemini-3.8-flash

5.3Medium

Attack vector: Network
Complexity: High
Privileges needed: None
User interaction: Required
Impact: High impact on availability
Weakness: CWE-476

Impact

A malicious or compromised ARM gateway can crash connecting FreeRDP clients, causing a denial of service. The attacker needs to control the configured ARM endpoint and have a client initiate a connection to it.

Root cause

The arm_handle_request_ok function dereferences a NULL pointer by passing it to strnlen when receiving an empty HTTP 200 response body.

Affected systems

FreeRDP 3.0.0-beta4 before 3.32.0

CVSS v3.1 · CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:N/A:H

Fix & remediation

Upgrade FreeRDP to version 3.32.0 or later. If upgrading immediately is not possible, do not connect to untrusted or compromised ARM gateways.

shell

$ sudo apt-get update && sudo apt-get install --only-upgrade freerdp2-x11

AI-suggested. Run it in staging first and check it against the vendor advisory. Why?

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NVD description

FreeRDP 3.0.0-beta4 before 3.32.0 contains a NULL pointer dereference in arm_handle_request_ok when an ARM endpoint returns an empty HTTP 200 body. Attackers controlling the configured ARM gateway can return a zero-length body to pass NULL to strnlen and crash the connecting client.

References

Source: nvd.nist.gov/vuln/detail/CVE-2026-109679