Reachable assertion in FreeRDP - CVE-2026-27015
Published: April 8, 2026
Vulnerability identifier: #VU125346
CSH Severity: Medium
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2026-27015
CWE-ID: CWE-617
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: FreeRDP
Affected software:
FreeRDP
FreeRDP
Detailed vulnerability description
The vulnerability allows a remote attacker to cause a denial of service.
The vulnerability exists due to reachable assertion in smartcard_unpack_read_size_align() in libfreerdp/utils/smartcard_pack.c when parsing crafted smartcard IOCTL data from an RDP server. A remote attacker can send a specially crafted SCARD_IOCTL_TRANSMIT request to cause a denial of service.
Smartcard redirection must be enabled, and user interaction is required for the client to connect to a malicious RDP server.
How to mitigate CVE-2026-27015
Install security update from vendor's website.