CVE-2023-40186

Publication date 31 August 2023

Last updated 26 August 2025

Ubuntu priority

Cvss 3 Severity Score

Description

FreeRDP is a free implementation of the Remote Desktop Protocol (RDP), released under the Apache license. Affected versions are subject to an IntegerOverflow leading to Out-Of-Bound Write Vulnerability in the `gdi_CreateSurface` function. This issue affects FreeRDP based clients only. FreeRDP proxies are not affected as image decoding is not done by a proxy. This issue has been addressed in versions 2.11.0 and 3.0.0-beta3. Users are advised to upgrade. There are no known workarounds for this issue.

Status

Show unmaintained releases

Package	Ubuntu Release	Status
freerdp2	23.10 mantic	Fixed 2.10.0+dfsg1-1.1ubuntu1
	23.04 lunar	Fixed 2.10.0+dfsg1-1ubuntu0.2
	22.04 LTS jammy	Fixed 2.6.1+dfsg1-3ubuntu2.4
	20.04 LTS focal	Fixed 2.2.0+dfsg1-0ubuntu0.20.04.5
	18.04 LTS bionic	Fixed 2.2.0+dfsg1-0ubuntu0.18.04.4+esm1
	16.04 LTS xenial	Ignored end of standard support
	14.04 LTS trusty	Ignored end of standard support

Get expanded security coverage with Ubuntu Pro

Reduce your average CVE exposure time from 98 days to 1 day with expanded CVE patching, ten-years security maintenance and optional support for the full stack of open-source applications. Free for personal use.

Get Ubuntu Pro 30-day free trial

Severity score breakdown

Parameter	Value
Base score	9.8 · Critical
Attack vector	Network
Attack complexity	Low
Privileges required	None
User interaction	None
Scope	Unchanged
Confidentiality	High
Integrity impact	High
Availability impact	High
Vector	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

References

Related Ubuntu Security Notices (USN)

USN-6401-1
FreeRDP vulnerabilities
4 October 2023