#VU125371 Double free in FreeRDP - CVE-2026-33995
Published: April 8, 2026
Vulnerability identifier: #VU125371
Vulnerability risk: Medium
CVSSv4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2026-33995
CWE-ID: CWE-415
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerable software:
FreeRDP
FreeRDP
Software vendor:
FreeRDP
FreeRDP
Description
The vulnerability allows a remote attacker to cause a denial of service.
The vulnerability exists due to double free in kerberos_AcceptSecurityContext() and kerberos_InitializeSecurityContextA() in the Kerberos SSPI context cleanup path when handling NLA connection teardown after a failed authentication attempt. A remote attacker can trigger an authentication failure to cause a denial of service.
Only clients compiled with Kerberos support and running on systems where a Kerberos realm is configured are vulnerable.
Remediation
Install security update from vendor's website.