CVE-2026-109252

5.3Medium

Published 12 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 RDP server can crash FreeRDP clients, causing denial of service. The attacker needs a user to connect to their malicious server.

Root cause

The RDPEAR NDR reader dereferences a null pointer during cleanup when processing truncated KERB_RPC_INTERNAL_NAME structures.

Affected systems

FreeRDP 3.9.0 through versions prior to 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. Avoid connecting clients to untrusted or unverified RDP servers until patched.

shell

$ sudo apt-get update && sudo apt-get --only-upgrade install 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 3.9.0 before 3.32.0 contains a NULL pointer dereference vulnerability in the RDPEAR NDR reader that allows malicious servers to crash clients via truncated KERB_RPC_INTERNAL_NAME data. Attackers can send a CreateApReqAuthenticatorReq with NameCount of two or more ending before the Names pointer, causing cleanup to dereference a null base and terminate the client.

References

Source: nvd.nist.gov/vuln/detail/CVE-2026-109252