CVE-2026-109945

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-362

Impact

A malicious RDP server can crash your client process via heap corruption when a user connects. The attacker needs control of the remote RDP server and requires the user to initiate a connection with smartcard redirection enabled.

Root cause

A race condition in smartcard emulation allows concurrent SCARD_IOCTL_DISCONNECT and SCARD_IOCTL_TRANSMIT requests on the same handle, causing a heap use-after-free.

Affected systems

FreeRDP 3.0.0 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 you cannot patch immediately, disable smartcard redirection in client connection profiles.

shell

$ sudo apt-get update && sudo apt-get install --only-upgrade freerdp3-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 before 3.32.0 contains a heap use-after-free vulnerability in smartcard emulation when SCARD_IOCTL_DISCONNECT and SCARD_IOCTL_TRANSMIT operate concurrently on one card handle. A malicious RDP server can overlap these IRPs through separate context workers to free and reuse the SCardHandle, causing client-process heap corruption and termination.

References

Source: nvd.nist.gov/vuln/detail/CVE-2026-109945