CVE-2026-27951
published 2026-02-25CVE-2026-27951: FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to version 3.23.0, the function `Stream_EnsureCapacity` can create an endless blocking…
PriorityP343high7.5CVSS 3.1
AVNACLPRNUINSUCNINAH
EPSS
0.35%
26.8th percentile
FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to version 3.23.0, the function `Stream_EnsureCapacity` can create an endless blocking loop. This may affect all client and server implementations using `FreeRDP`. For practical exploitation this will only work on 32bit systems where the available physical memory is `>= SIZE_MAX`. Version 3.23.0 contains a patch. No known workarounds are available.
Affected
3 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| debian | freerdp2 | < freerdp3 3.23.0+dfsg-1 (forky) | freerdp3 3.23.0+dfsg-1 (forky) |
| debian | freerdp3 | < freerdp3 3.23.0+dfsg-1 (forky) | freerdp3 3.23.0+dfsg-1 (forky) |
| freerdp | freerdp | < 3.23.0 | 3.23.0 |
CVSS provenance
nvdv3.17.5HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
osv7.5HIGH
vendor_debian5.3MEDIUM
vendor_redhat5.3MEDIUM
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Ubuntu
FreeRDP vulnerabilities
vendor_ubuntu·2026-03-18
CVE-2026-25954 FreeRDP vulnerabilities
Title: FreeRDP vulnerabilities
Summary: Several security issues were fixed in FreeRDP.
It was discovered that FreeRDP incorrectly handled certain RDP packets. A
remote attacker could use this issue to cause FreeRDP to crash, resulting
in a denial of service, or possibly execute arbitrary code.
Instructions: In general, a standard system update will make all the necessary changes.
Red Hat
freerdp: FreeRDP: Denial of Service via endless blocking loop in Stream_EnsureCapacity
vendor_redhat·2026-02-25·CVSS 5.3
CVE-2026-27951 [MEDIUM] CWE-190 freerdp: FreeRDP: Denial of Service via endless blocking loop in Stream_EnsureCapacity
freerdp: FreeRDP: Denial of Service via endless blocking loop in Stream_EnsureCapacity
FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to version 3.23.0, the function `Stream_EnsureCapacity` can create an endless blocking loop. This may affect all client and server implementations using `FreeRDP`. For practical exploitation this will only work on 32bit systems where the available physical memory is `>= SIZE_MAX`. Version 3.23.0 contains a patch. No known workarounds are available.
A flaw was found in FreeRDP, a free implementation of the Remote Desktop Protocol. The `Stream_EnsureCapacity` function can create an endless blocking loop, leading to a Denial of Service (DoS). This vulnerability can be exploited on 32-bit systems where the available physical memory is g
Debian
CVE-2026-27951: freerdp2 - FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to versio...
vendor_debian·2026·CVSS 5.3
CVE-2026-27951 [MEDIUM] CVE-2026-27951: freerdp2 - FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to versio...
FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to version 3.23.0, the function `Stream_EnsureCapacity` can create an endless blocking loop. This may affect all client and server implementations using `FreeRDP`. For practical exploitation this will only work on 32bit systems where the available physical memory is `>= SIZE_MAX`. Version 3.23.0 contains a patch. No known workarounds are available.
Scope: local
bookworm: open
bullseye: open
VulDB
FreeRDP up to 3.22.x Stream_EnsureCapacity integer overflow (GHSA-qcfc-ghxr-h927 / Nessus ID 300278)
vuldb·2026-05-14·CVSS 7.5
CVE-2026-27951 [HIGH] FreeRDP up to 3.22.x Stream_EnsureCapacity integer overflow (GHSA-qcfc-ghxr-h927 / Nessus ID 300278)
A vulnerability identified as problematic has been detected in FreeRDP up to 3.22.x. This impacts the function Stream_EnsureCapacity. Performing a manipulation results in integer overflow.
This vulnerability is known as CVE-2026-27951. Remote exploitation of the attack is possible. No exploit is available.
You should upgrade the affected component.
OSV
CVE-2026-27951: FreeRDP is a free implementation of the Remote Desktop Protocol
osv·2026-02-25·CVSS 7.5
CVE-2026-27951 [HIGH] CVE-2026-27951: FreeRDP is a free implementation of the Remote Desktop Protocol
FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to version 3.23.0, the function `Stream_EnsureCapacity` can create an endless blocking loop. This may affect all client and server implementations using `FreeRDP`. For practical exploitation this will only work on 32bit systems where the available physical memory is `>= SIZE_MAX`. Version 3.23.0 contains a patch. No known workarounds are available.
No detection rules found.
No public exploits indexed.
Bugzilla
CVE-2026-27951 freerdp2: FreeRDP: Denial of Service via endless blocking loop in Stream_EnsureCapacity [fedora-42]
bugzilla·2026-02-25·CVSS 7.5
CVE-2026-27951 [HIGH] CVE-2026-27951 freerdp2: FreeRDP: Denial of Service via endless blocking loop in Stream_EnsureCapacity [fedora-42]
CVE-2026-27951 freerdp2: FreeRDP: Denial of Service via endless blocking loop in Stream_EnsureCapacity [fedora-42]
Disclaimer: Community trackers are created by Red Hat Product Security team on a best effort basis. Package maintainers are required to ascertain if the flaw indeed affects their package, before starting the update process.
Discussion:
This message is a reminder that Fedora Linux 42 is nearing its end of life.
Fedora will stop maintaining and issuing updates for Fedora Linux 42 on 2026-05-13.
It is Fedora's policy to close all bug reports from releases that are no longer
maintained. At that time this bug will be closed as EOL if it remains open with a
'version' of '42'.
Package Maintainer: If you wish for this bug to remain open because you
plan to fix it in a currently ma
Bugzilla
CVE-2026-27951 freerdp: FreeRDP: Denial of Service via endless blocking loop in Stream_EnsureCapacity [fedora-42]
bugzilla·2026-02-25·CVSS 7.5
CVE-2026-27951 [HIGH] CVE-2026-27951 freerdp: FreeRDP: Denial of Service via endless blocking loop in Stream_EnsureCapacity [fedora-42]
CVE-2026-27951 freerdp: FreeRDP: Denial of Service via endless blocking loop in Stream_EnsureCapacity [fedora-42]
Disclaimer: Community trackers are created by Red Hat Product Security team on a best effort basis. Package maintainers are required to ascertain if the flaw indeed affects their package, before starting the update process.
Discussion:
This bug is already fixed in a published Bodhi update.
---
FEDORA-2026-53fe996a57 (freerdp-3.23.0-1.fc42) has been submitted as an update to Fedora 42.
https://bodhi.fedoraproject.org/updates/FEDORA-2026-53fe996a57
Bugzilla
CVE-2026-27951 freerdp: FreeRDP: Denial of Service via endless blocking loop in Stream_EnsureCapacity
bugzilla·2026-02-25·CVSS 7.5
CVE-2026-27951 [HIGH] CVE-2026-27951 freerdp: FreeRDP: Denial of Service via endless blocking loop in Stream_EnsureCapacity
CVE-2026-27951 freerdp: FreeRDP: Denial of Service via endless blocking loop in Stream_EnsureCapacity
FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to version 3.23.0, the function `Stream_EnsureCapacity` can create an endless blocking loop. This may affect all client and server implementations using `FreeRDP`. For practical exploitation this will only work on 32bit systems where the available physical memory is `>= SIZE_MAX`. Version 3.23.0 contains a patch. No known workarounds are available.
Discussion:
This issue has been addressed in the following products:
Red Hat Enterprise Linux 8
Via RHSA-2026:16019 https://access.redhat.com/errata/RHSA-2026:16019
Wiz
CVE-2026-27951 Impact, Exploitability, and Mitigation Steps | Wiz
blogs_wiz·CVSS 5.3
CVE-2026-27951 [MEDIUM] CVE-2026-27951 Impact, Exploitability, and Mitigation Steps | Wiz
## CVE-2026-27951 :
NixOS vulnerability analysis and mitigation
Stream_EnsureCapacity
FreeRDP
>= SIZE_MAX
Source : NVD
## 7.5
Score
Published February 25, 2026
Severity HIGH
CNA Score 5.3
Affected Technologies
NixOS
Wolfi
Has Public Exploit Yes
Has CISA KEV Exploit No
CISA KEV Release Date N/A
CISA KEV Due Date N/A
Exploitation Probability Percentile (EPSS) 17.8
Exploitation Probability (EPSS) 0.1
Affected packages and libraries
freerdp3
freerdp-libs
Sources
NVD
Alpine 3.10, 3.11, 3.12, 3.13, 3.14, 3.15, 3.16, 3.17, 3.18, 3.19, 3.20, 3.21, 3.22 Severity HIGH No Fix Added at: Mar 02, 2026
Chainguard Has Fix Added at: Mar 02, 2026
Debian 11 Severity HIGH No Fix Added at: Mar 02, 2026
Debian 12, 13 Severity MEDIUM No Fix Added at: Mar 02, 2026
Debian 14 Severity
2026-02-25
Published