Is CVE-2023-40186 in the CISA KEV catalog?

No. CVE-2023-40186 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2023-40186?

CVE-2023-40186 has a CVSS v3 base score of 6.5 (MEDIUM).

What is the EPSS score for CVE-2023-40186?

CVE-2023-40186 has an EPSS score of 1.15% (63th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2023-40186?

Upgrade freerdp2 on debian 11 to 2.3.0+dfsg1-2+deb11u2 or later. Fixes are available for 23 affected products.

CVE & CISA-KEV Catalog

CVE-2023-40186

MEDIUM

6.5

CVSS v3

NVD

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.

CWE-190Integer Overflow CWE-787Out-of-bounds Write

How to fix

Remediation Available

freerdp2Debian

Fixed in:2.3.0+dfsg1-2+deb11u2CVE-2023-40186

Fixed in:2.11.7+dfsg1-6~deb12u1CVE-2023-40186

freerdpRed Hat / RHEL

Fixed in:2:2.11.2-1.el9RHSA-2024:2208

freerdpRocky

Fixed in:2:2.11.2-1.el9RHSA-2024:2208

freerdp-debuginfoRed Hat / RHEL

Fixed in:2:2.11.2-1.el9RHSA-2024:2208

freerdp-debuginfoRocky

Fixed in:2:2.11.2-1.el9RHSA-2024:2208

freerdp-debugsourceRed Hat / RHEL

Fixed in:2:2.11.2-1.el9RHSA-2024:2208

freerdp-debugsourceRocky

Fixed in:2:2.11.2-1.el9RHSA-2024:2208

freerdp-develRed Hat / RHEL

Fixed in:2:2.11.2-1.el9RHSA-2024:2208

freerdp-develRocky

Fixed in:2:2.11.2-1.el9RHSA-2024:2208

freerdp-libsRocky

Fixed in:2:2.11.2-1.el9RHSA-2024:2208

freerdp-libsRed Hat / RHEL

Fixed in:2:2.11.2-1.el9RHSA-2024:2208

freerdp-libs-debuginfoRed Hat / RHEL

Fixed in:2:2.11.2-1.el9RHSA-2024:2208

freerdp-libs-debuginfoRocky

Fixed in:2:2.11.2-1.el9RHSA-2024:2208

libwinprRed Hat / RHEL

Fixed in:2:2.11.2-1.el9RHSA-2024:2208

libwinprRocky

Fixed in:2:2.11.2-1.el9RHSA-2024:2208

libwinpr-debuginfoRed Hat / RHEL

Fixed in:2:2.11.2-1.el9RHSA-2024:2208

libwinpr-debuginfoRocky

Fixed in:2:2.11.2-1.el9RHSA-2024:2208

libwinpr-develRed Hat / RHEL

Fixed in:2:2.11.2-1.el9RHSA-2024:2208

libwinpr-develRocky

Fixed in:2:2.11.2-1.el9RHSA-2024:2208

freerdp2Ubuntu

Fixed in:2.2.0+dfsg1-0ubuntu0.18.04.4+esm1USN-6401-1

Fixed in:2.2.0+dfsg1-0ubuntu0.20.04.5USN-6401-1

Fixed in:2.6.1+dfsg1-3ubuntu2.4USN-6401-1

Fixed in:2.10.0+dfsg1-1ubuntu0.2USN-6401-1

libfreerdp2-2Ubuntu

Fixed in:2.2.0+dfsg1-0ubuntu0.18.04.4+esm1USN-6401-1

Fixed in:2.2.0+dfsg1-0ubuntu0.20.04.5USN-6401-1

Fixed in:2.6.1+dfsg1-3ubuntu2.4USN-6401-1

Fixed in:2.10.0+dfsg1-1ubuntu0.2USN-6401-1

libwinpr2-2Ubuntu

Fixed in:2.2.0+dfsg1-0ubuntu0.18.04.4+esm1USN-6401-1

Fixed in:2.2.0+dfsg1-0ubuntu0.20.04.5USN-6401-1

Fixed in:2.6.1+dfsg1-3ubuntu2.4USN-6401-1

libwinpr2-devUbuntu

Fixed in:2.2.0+dfsg1-0ubuntu0.18.04.4+esm1USN-6401-1

Fixed in:2.2.0+dfsg1-0ubuntu0.20.04.5USN-6401-1

Fixed in:2.6.1+dfsg1-3ubuntu2.4USN-6401-1

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredNone

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityNone

IntegrityLow

AvailabilityLow

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L

Exploit Intelligence

1.15%probability of exploitation in 30 days

63rdpercentile

Moderate risk: more likely to be exploited than 63% of all known CVEs.

References

Exploit1

github.com

Third-Party Advisory1

lists.debian.org

Issue Tracking1

github.com

Mailing List3

Other references2

Related Vulnerabilities

Other CWE-190 (Integer Overflow) vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2020-16040	Medium	6.5	100%	-	Fix
CVE-2019-11477	High	7.5	99%	-	Fix
CVE-2023-44443	High	7.8	94%	-	Fix
CVE-2014-0569	High	9.3	90%	-	-
CVE-2017-3599	High	7.5	90%	-	Fix
CVE-2023-21716	Critical	9.8	82%	-	Fix

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2025-11-03.