Release of invalid pointer or reference in FreeRDP - #VU164452
Published: November 10, 2026
Vulnerability identifier: #VU164452
CSH Severity: Medium
CVSS v4: 6.7 [CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
CVE-ID: N/A
CWE-ID: CWE-763
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to cause a denial of service in a FreeRDP client.
The vulnerability exists due to an invalid pointer free in the RD Gateway transport when chunked decoder state overwrites a websocket context pointer stored in the same union. A remote attacker can supply crafted chunk sizes through a malicious RD Gateway data channel using Transfer-Encoding: chunked to trigger an invalid dereference and free during connection teardown, potentially crashing the client.
Affected software
FreeRDP
Remediation
Install security update from vendor's website.
FreeRDP - update to 3.33.0