CVE-2026-33995

A flaw was found in FreeRDP, a free implementation of the Remote Desktop Protocol. A remote attacker could exploit a double-free vulnerability in the Kerberos security context functions, specifically kerberos_AcceptSecurityContext() and kerberos_InitializeSecurityContextA(), within the WinPR library. This vulnerability is triggered during the Network Level Authentication (NLA) connection teardown process after a failed authentication attempt. Successful exploitation can lead to a client crash, resulting in a Denial of Service (DoS) for affected FreeRDP clients configured with Kerberos.

The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.

Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability.