Use-after-free in FreeRDP - CVE-2026-44422
Published: May 12, 2026
Vulnerability identifier: #VU131101
CSH Severity: Medium
CVSS v4: 7.5 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-44422
CWE-ID: CWE-416
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to cause client-side memory corruption.
The vulnerability exists due to use-after-free in the RDPEAR NDR parser when processing crafted RDPEAR NDR data from an RDP server. A remote attacker can reuse a non-null NDR pointer ref-id across multiple logical pointer fields to cause client-side memory corruption.
User interaction is required because the client must connect to a malicious or compromised RDP server, and exploitation is reachable when RDPEAR or Remote Credential Guard is in use.
Affected software
FreeRDP
How to mitigate CVE-2026-44422
Install security update from vendor's website.
FreeRDP - update to 3.26.0