CVE-2026-109941

6.5Medium

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

6.5Medium

Attack vector: Network
Complexity: Low
Privileges needed: None
User interaction: Required
Impact: High impact on availability
Weakness: CWE-835

Impact

A rogue RD Gateway can permanently freeze the FreeRDP client decoder thread, causing a denial of service. The attacker needs a user to initiate a connection to a malicious gateway.

Root cause

The http_chuncked_read function enters an infinite loop handling zero-byte reads when a server closes the TLS connection mid-stream during an incomplete chunk-size line or footer.

Affected systems

FreeRDP from 2.3.0 before 3.32.0

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

Fix & remediation

Upgrade FreeRDP to version 3.32.0 or later. As an interim workaround, do not connect to untrusted or unverified RD 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 from 2.3.0 before 3.32.0 contains an infinite loop vulnerability in http_chuncked_read that allows malicious RD Gateways to hang clients by sending incomplete chunked responses. Attackers can send a partial chunk-size line or footer followed by a clean TLS shutdown, causing zero-byte reads to loop forever and freeze the client decoder thread.

References

Source: nvd.nist.gov/vuln/detail/CVE-2026-109941