CVE-2026-27951: Freerdp

High severity, CVSS 7.5. EPSS: 0.4% chance of exploitation in the next 30 days.

FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to version 3.23.0, the function `Stream_EnsureCapacity` can create an endless blocking loop. This may affect all client and server implementations using `FreeRDP`. For practical exploitation this will only work on 32bit systems where the available physical memory is `>= SIZE_MAX`. Version 3.23.0 contains a patch. No known workarounds are available.

Affected products

• Freerdp Freerdp: before 3.23.0 (fixed in 3.23.0)

Published 2026-02-25. Last modified 2026-06-17.