Resource exhaustion in FreeRDP - #VU164456
Published: November 10, 2026
Vulnerability identifier: #VU164456
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-400
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to cause a denial of service through unbounded memory consumption and quadratic CPU usage.
The vulnerability exists due to uncontrolled resource consumption in FreeRDP's progressive_decompress() function when processing successive Progressive graphics commands without a change in frame identifier. A remote attacker can operate a malicious RDP server and repeatedly send RDPGFX_CAPROGRESSIVE WireToSurface2 commands with a constant frameId, or omit RDPGFX_START_FRAME, to accumulate tile updates and allocations until the connected client becomes unresponsive or exhausts memory.
Affected software
FreeRDP
Remediation
Install security update from vendor's website.
FreeRDP - update to 3.33.0