CVE-2026-44420

HIGHEPSS 89th pctl

8.8

CVSS v3

Description

FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to 3.26.0, a malicious RDP client can trigger a heap-buffer-overflow write in FreeRDP's server-side clipboard (cliprdr) channel by sending a CB_CLIP_CAPS PDU with a too-small capabilitySetLength. This can crash the server process (remote DoS) and may be exploitable for code execution because it corrupts heap memory. This vulnerability is fixed in 3.26.0.

CWE-122Heap-based Buffer Overflow CWE-131

How to fix

Remediation Available

freerdpRocky

Fixed in:2:3.10.3-12.el10_2.6RHSA-2026:36203

Fixed in:2:3.10.3-3.el10_0.9RHSA-2026:46393

Fixed in:2:3.10.3-12.el10_2.6RHSA-2026:36203

Fixed in:2:3.10.3-3.el10_0.9RHSA-2026:46393

freerdpRed Hat / RHEL

Fixed in:2:3.10.3-3.el10_0.9RHSA-2026:46393

Fixed in:2:3.10.3-12.el10_2.6RHSA-2026:36203

Fixed in:2:3.10.3-3.el10_0.9RHSA-2026:46393

Fixed in:2:3.10.3-12.el10_2.6RHSA-2026:36203

Fixed in:2:3.10.3-3.el10_0.9RHSA-2026:46393

Fixed in:2:3.10.3-12.el10_2.6RHSA-2026:36203

freerdp-debuginfoRed Hat / RHEL

Fixed in:2:3.10.3-3.el10_0.9RHSA-2026:46393

Fixed in:2:3.10.3-12.el10_2.6RHSA-2026:36203

Fixed in:2:3.10.3-3.el10_0.9RHSA-2026:46393

Fixed in:2:3.10.3-12.el10_2.6RHSA-2026:36203

Fixed in:2:3.10.3-3.el10_0.9RHSA-2026:46393

freerdp-debuginfoRocky

Fixed in:2:3.10.3-12.el10_2.6RHSA-2026:36203

Fixed in:2:3.10.3-3.el10_0.9RHSA-2026:46393

Fixed in:2:3.10.3-12.el10_2.6RHSA-2026:36203

Fixed in:2:3.10.3-3.el10_0.9RHSA-2026:46393

Fixed in:2:3.10.3-12.el10_2.6RHSA-2026:36203

Fixed in:2:3.10.3-3.el10_0.9RHSA-2026:46393

freerdp-debugsourceRocky

Fixed in:2:3.10.3-12.el10_2.6RHSA-2026:36203

Fixed in:2:3.10.3-3.el10_0.9RHSA-2026:46393

Fixed in:2:3.10.3-12.el10_2.6RHSA-2026:36203

Fixed in:2:3.10.3-3.el10_0.9RHSA-2026:46393

Fixed in:2:3.10.3-12.el10_2.6RHSA-2026:36203

Fixed in:2:3.10.3-3.el10_0.9RHSA-2026:46393

freerdp-debugsourceRed Hat / RHEL

Fixed in:2:3.10.3-12.el10_2.6RHSA-2026:36203

Fixed in:2:3.10.3-3.el10_0.9RHSA-2026:46393

Fixed in:2:3.10.3-12.el10_2.6RHSA-2026:36203

Fixed in:2:3.10.3-3.el10_0.9RHSA-2026:46393

Fixed in:2:3.10.3-12.el10_2.6RHSA-2026:36203

Fixed in:2:3.10.3-3.el10_0.9RHSA-2026:46393

freerdp-develRed Hat / RHEL

Fixed in:2:3.10.3-3.el10_0.9RHSA-2026:46393

Fixed in:2:3.10.3-12.el10_2.6RHSA-2026:36203

Fixed in:2:3.10.3-3.el10_0.9RHSA-2026:46393

Fixed in:2:3.10.3-12.el10_2.6RHSA-2026:36203

Fixed in:2:3.10.3-3.el10_0.9RHSA-2026:46393

Fixed in:2:3.10.3-12.el10_2.6RHSA-2026:36203

freerdp-develRocky

Fixed in:2:3.10.3-12.el10_2.6RHSA-2026:36203

Fixed in:2:3.10.3-3.el10_0.9RHSA-2026:46393

Fixed in:2:3.10.3-12.el10_2.6RHSA-2026:36203

Fixed in:2:3.10.3-3.el10_0.9RHSA-2026:46393

Fixed in:2:3.10.3-12.el10_2.6RHSA-2026:36203

Fixed in:2:3.10.3-3.el10_0.9RHSA-2026:46393

Fixed in:2:3.10.3-12.el10_2.6RHSA-2026:36203

freerdp-libsRed Hat / RHEL

Fixed in:2:3.10.3-3.el10_0.9RHSA-2026:46393

Fixed in:2:3.10.3-12.el10_2.6RHSA-2026:36203

Fixed in:2:3.10.3-3.el10_0.9RHSA-2026:46393

Fixed in:2:3.10.3-12.el10_2.6RHSA-2026:36203

freerdp-libsRocky

Fixed in:2:3.10.3-3.el10_0.9RHSA-2026:46393

Fixed in:2:3.10.3-12.el10_2.6RHSA-2026:36203

Fixed in:2:3.10.3-3.el10_0.9RHSA-2026:46393

Fixed in:2:3.10.3-12.el10_2.6RHSA-2026:36203

Fixed in:2:3.10.3-3.el10_0.9RHSA-2026:46393

Fixed in:2:3.10.3-12.el10_2.6RHSA-2026:36203

freerdp-libs-debuginfoRed Hat / RHEL

Fixed in:2:3.10.3-12.el10_2.6RHSA-2026:36203

Fixed in:2:3.10.3-3.el10_0.9RHSA-2026:46393

Fixed in:2:3.10.3-12.el10_2.6RHSA-2026:36203

Fixed in:2:3.10.3-3.el10_0.9RHSA-2026:46393

Fixed in:2:3.10.3-12.el10_2.6RHSA-2026:36203

Fixed in:2:3.10.3-3.el10_0.9RHSA-2026:46393

freerdp-libs-debuginfoRocky

Fixed in:2:3.10.3-3.el10_0.9RHSA-2026:46393

Fixed in:2:3.10.3-12.el10_2.6RHSA-2026:36203

Fixed in:2:3.10.3-3.el10_0.9RHSA-2026:46393

Fixed in:2:3.10.3-12.el10_2.6RHSA-2026:36203

Fixed in:2:3.10.3-3.el10_0.9RHSA-2026:46393

Fixed in:2:3.10.3-12.el10_2.6RHSA-2026:36203

Fixed in:2:3.10.3-3.el10_0.9RHSA-2026:46393

freerdp-serverRed Hat / RHEL

Fixed in:2:3.10.3-3.el10_0.9RHSA-2026:46393

Fixed in:2:3.10.3-12.el10_2.6RHSA-2026:36203

Fixed in:2:3.10.3-3.el10_0.9RHSA-2026:46393

Fixed in:2:3.10.3-12.el10_2.6RHSA-2026:36203

Fixed in:2:3.10.3-3.el10_0.9RHSA-2026:46393

Fixed in:2:3.10.3-12.el10_2.6RHSA-2026:36203

freerdp-serverRocky

Fixed in:2:3.10.3-3.el10_0.9RHSA-2026:46393

Fixed in:2:3.10.3-12.el10_2.6RHSA-2026:36203

Fixed in:2:3.10.3-3.el10_0.9RHSA-2026:46393

Fixed in:2:3.10.3-12.el10_2.6RHSA-2026:36203

Fixed in:2:3.10.3-3.el10_0.9RHSA-2026:46393

Fixed in:2:3.10.3-12.el10_2.6RHSA-2026:36203

freerdp-server-debuginfoRed Hat / RHEL

Fixed in:2:3.10.3-12.el10_2.6RHSA-2026:36203

Fixed in:2:3.10.3-3.el10_0.9RHSA-2026:46393

freerdp-server-debuginfoRocky

Fixed in:2:3.10.3-12.el10_2.6RHSA-2026:36203

Fixed in:2:3.10.3-3.el10_0.9RHSA-2026:46393

Fixed in:2:3.10.3-12.el10_2.6RHSA-2026:36203

Fixed in:2:3.10.3-3.el10_0.9RHSA-2026:46393

libwinprRed Hat / RHEL

Fixed in:2:3.10.3-12.el10_2.6RHSA-2026:36203

Fixed in:2:3.10.3-3.el10_0.9RHSA-2026:46393

Fixed in:2:3.10.3-12.el10_2.6RHSA-2026:36203

Fixed in:2:3.10.3-3.el10_0.9RHSA-2026:46393

Fixed in:2:3.10.3-12.el10_2.6RHSA-2026:36203

Fixed in:2:3.10.3-3.el10_0.9RHSA-2026:46393

libwinprRocky

Fixed in:2:3.10.3-12.el10_2.6RHSA-2026:36203

Fixed in:2:3.10.3-3.el10_0.9RHSA-2026:46393

Fixed in:2:3.10.3-12.el10_2.6RHSA-2026:36203

libwinpr-debuginfoRocky

Fixed in:2:3.10.3-3.el10_0.9RHSA-2026:46393

Fixed in:2:3.10.3-12.el10_2.6RHSA-2026:36203

Fixed in:2:3.10.3-3.el10_0.9RHSA-2026:46393

Fixed in:2:3.10.3-12.el10_2.6RHSA-2026:36203

Fixed in:2:3.10.3-3.el10_0.9RHSA-2026:46393

Fixed in:2:3.10.3-12.el10_2.6RHSA-2026:36203

libwinpr-debuginfoRed Hat / RHEL

Fixed in:2:3.10.3-12.el10_2.6RHSA-2026:36203

Fixed in:2:3.10.3-3.el10_0.9RHSA-2026:46393

Fixed in:2:3.10.3-12.el10_2.6RHSA-2026:36203

Fixed in:2:3.10.3-3.el10_0.9RHSA-2026:46393

libwinpr-develRocky

Fixed in:2:3.10.3-3.el10_0.9RHSA-2026:46393

Fixed in:2:3.10.3-12.el10_2.6RHSA-2026:36203

Fixed in:2:3.10.3-3.el10_0.9RHSA-2026:46393

Fixed in:2:3.10.3-12.el10_2.6RHSA-2026:36203

libwinpr-develRed Hat / RHEL

Fixed in:2:3.10.3-12.el10_2.6RHSA-2026:36203

Fixed in:2:3.10.3-3.el10_0.9RHSA-2026:46393

Fixed in:2:3.10.3-12.el10_2.6RHSA-2026:36203

Fixed in:2:3.10.3-3.el10_0.9RHSA-2026:46393

Fixed in:2:3.10.3-12.el10_2.6RHSA-2026:36203

freerdp3Ubuntu

Fixed in:3.30.0+dfsg-0ubuntu0.24.04.1USN-8561-1

freerdp3-x11Ubuntu

Fixed in:3.30.0+dfsg-0ubuntu0.24.04.1USN-8561-1

libfreerdp3-3Ubuntu

Fixed in:3.30.0+dfsg-0ubuntu0.24.04.1USN-8561-1

TridentStack Control can deploy fixes like this automatically across your Windows, macOS, and Linux fleet. See how it works

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 RequiredLow

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityHigh

AvailabilityHigh

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

Exploit Intelligence

3.67%probability of exploitation in 30 days

89thpercentile

Elevated risk: more likely to be exploited than 89% of all known CVEs.

References

Exploit1

github.com

Other references6

Related Vulnerabilities

Other CWE-122 (Heap-based Buffer Overflow) vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2015-3113	Critical	9.8	100%	KEV	Fix
CVE-2024-26256	High	7.8	88%	-	Fix
CVE-2020-25687	Medium	5.9	87%	-	Fix
CVE-2009-3459	High	8.8	87%	KEV	Fix
CVE-2021-21017	High	8.8	86%	KEV	-
CVE-2020-25683	Medium	5.9	86%	-	Fix

Common questions

How do I fix CVE-2026-44420?

Published advisories record a fix for 25 affected products. The "How to fix" section on this page lists the fixed version and source advisory for each one, so apply the entry matching what you actually run.

Is CVE-2026-44420 being actively exploited?

Not that we know of. CVE-2026-44420 is not in the CISA Known Exploited Vulnerabilities catalog. Its EPSS score of 3.7% is the estimated probability that it will be exploited in the next 30 days. That is higher than 89% of all scored CVEs.

How severe is CVE-2026-44420?

CVE-2026-44420 has a CVSS v3 base score of 8.8, rated high. CVSS rates the technical impact if the vulnerability is exploited, not how likely that is, so weigh it alongside the exploit-prediction score when you decide what to patch first.

What does CVE-2026-44420 affect?

Published advisories record a fix for freerdp (Rocky), freerdp (Red Hat / RHEL), freerdp-debuginfo (Red Hat / RHEL), freerdp-debuginfo (Rocky), and 21 more. Only products with a sourced advisory are listed, so treat this as what we can cite rather than a complete inventory.

Embed a live status badge for CVE-2026-44420

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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 2026-07-27.