CVE-2026-27015
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.
- Score
- CVSS 3.1 6.5 Medium
- Status
- Analyzed - security-advisories@github.com
- Published
- 2026-02-25
- Last modified
- 2026-02-26
- Weaknesses
- CWE-617
Affected products
References
- https://github.com/FreeRDP/FreeRDP/commit/65d59d3b3c2f630f2ea862687ecf5f95f8115244
- https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-7g72-39pq-4725
