Is CVE-2022-23478 in the CISA KEV catalog?

No. CVE-2022-23478 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2022-23478?

CVE-2022-23478 has a CVSS v3 base score of 9.1 (CRITICAL).

What is the EPSS score for CVE-2022-23478?

CVE-2022-23478 has an EPSS score of 0.80% (52th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2022-23478?

Upgrade xrdp on debian 11 to 0.9.21.1-1~deb11u1 or later. Fixes are available for 2 affected products.

CVE & CISA-KEV Catalog

CVE-2022-23478

CRITICAL

9.1

CVSS v3

NVD

Description

xrdp is an open source project which provides a graphical login to remote machines using Microsoft Remote Desktop Protocol (RDP). xrdp < v0.9.21 contain a Out of Bound Write in xrdp_mm_trans_process_drdynvc_channel_open() function. There are no known workarounds for this issue. Users are advised to upgrade.

CWE-787Out-of-bounds Write

How to fix

Remediation Available

xrdpDebian

Fixed in:0.9.21.1-1~deb11u1CVE-2022-23478

Fixed in:0.9.21.1-1CVE-2022-23478

xrdpUbuntu

Fixed in:0.6.0-1ubuntu0.1+esm3USN-6474-1

Fixed in:0.6.1-2ubuntu0.3+esm3USN-6474-1

Fixed in:0.9.5-2ubuntu0.1~esm2USN-6474-1

Fixed in:0.9.12-1ubuntu0.1+esm1USN-6474-1

Fixed in:0.9.17-2ubuntu2+esm1USN-6474-1

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

IntegrityHigh

AvailabilityHigh

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

Exploit Intelligence

0.80%probability of exploitation in 30 days

52ndpercentile

Moderate risk: more likely to be exploited than 52% of all known CVEs.

References

Third-Party Advisory2

Related Vulnerabilities

Other CWE-787 (Out-of-bounds Write) vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2025-22457	Critical	9.0	100%	KEV + Ransom	Fix
CVE-2025-0282	Critical	9.0	100%	KEV + Ransom	-
CVE-2015-3113	Critical	9.8	100%	KEV	Fix
CVE-2021-20038	Critical	9.8	100%	KEV + Ransom	-
CVE-2023-4863	High	8.8	100%	KEV	Fix
CVE-2020-16040	Medium	6.5	100%	-	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 2024-11-21.