Integer overflow in FreeRDP - #VU164449
Published: November 10, 2026
Vulnerability identifier: #VU164449
CSH Severity: High
CVSS v4: 8.8 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:L/SC:N/SI:N/SA:N]
CVE-ID: N/A
CWE-ID: CWE-190
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to corrupt client process memory and cause a denial of service.
The vulnerability exists due to integer overflow in FreeRDP client drawing-order bounds accumulation and GDI geometry calculations when processing server-supplied drawing orders, allowing invalid geometry to bypass clipping. A remote attacker can operate an RDP server that completes the handshake and sends repeated ORDER_BOUNDS updates followed by a crafted OPAQUE_RECT order to write beyond the heap-allocated drawing bitmap.
Affected software
FreeRDP
Remediation
Install security update from vendor's website.
FreeRDP - update to 3.33.0