CVE-2026-27015

Medium

Description

FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to version 3.23.0, a missing bounds check in `smartcard_unpack_read_size_align()` (`libfreerdp/utils/smartcard_pack.c:1703`) allows a malicious RDP server to crash the FreeRDP client via a reachable `WINPR_ASSERT` → `abort()`. The crash occurs in upstream builds where `WITH_VERBOSE_WINPR_ASSERT=ON` (default in FreeRDP 3.22.0 / current WinPR CMake defaults). Smartcard redirection must be explicitly enabled by the user (e.g., `xfreerdp /smartcard`; `/smartcard-logon` implies `/smartcard`). Version 3.23.0 fixes the issue.

SeverityMedium

CVSS6.5

Exploit probability—

ProductFreerdp

PublishedFeb 25, 2026

First seenFeb 25, 2026

Weakness typeCWE-617CWE-617

How to fix

Update

freerdp freerdp3.23.0 or later

Affected products

Product	Affected versions	Fixed in
freerdp freerdp	v < 3.23.0	3.23.0

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