FreeRDP up to 3.22.x xf_rail_server_local_move_size use after free

CVSS Meta Temp Score
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CTI Interest Score
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5.8$0-$5k0.00

Summaryinfo

A vulnerability identified as critical has been detected in FreeRDP up to 3.22.x. This impacts the function xf_rail_server_local_move_size. Performing a manipulation results in use after free. This vulnerability is known as CVE-2026-25954. Remote exploitation of the attack is possible. No exploit is available. You should upgrade the affected component.

Detailsinfo

A vulnerability classified as critical has been found in FreeRDP up to 3.22.x. This affects the function xf_rail_server_local_move_size. The manipulation with an unknown input leads to a use after free vulnerability. CWE is classifying the issue as CWE-416. Referencing memory after it has been freed can cause a program to crash, use unexpected values, or execute code. This is going to have an impact on availability. The summary by CVE is:

FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to version 3.23.0, `xf_rail_server_local_move_size` dereferences a freed `xfAppWindow` pointer because `xf_rail_get_window` returns an unprotected pointer from the `railWindows` hash table, and the main thread can concurrently delete the window (via a window delete order) while the RAIL channel thread is still using the pointer. Version 3.23.0 fixes the issue.

It is possible to read the advisory at github.com. This vulnerability is uniquely identified as CVE-2026-25954 since 02/09/2026. The exploitability is told to be easy. It is possible to initiate the attack remotely. Technical details of the vulnerability are known, but there is no available exploit.

The vulnerability scanner Nessus provides a plugin with the ID 300276 (Linux Distros Unpatched Vulnerability : CVE-2026-25954), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 3.23.0 eliminates this vulnerability. Applying the patch 1994e9844212a6dfe0ff12309fef520e888986b5 is able to eliminate this problem. The bugfix is ready for download at github.com. The best possible mitigation is suggested to be upgrading to the latest version.

The vulnerability is also documented in the databases at Tenable (300276) and CERT Bund (WID-SEC-2026-0514). Be aware that VulDB is the high quality source for vulnerability data.

Affected

  • Amazon Linux 2
  • Red Hat Enterprise Linux
  • Fedora Linux
  • Ubuntu Linux
  • SUSE Linux
  • Oracle Linux
  • SUSE openSUSE
  • RESF Rocky Linux
  • Open Source FreeRDP

Productinfo

Type

Name

Version

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA CVSS-B Score: 🔒
CNA CVSS-BT Score: 🔒
CNA Vector: 🔒

CVSSv3info

VulDB Meta Base Score: 5.9
VulDB Meta Temp Score: 5.8

VulDB Base Score: 4.3
VulDB Temp Score: 4.1
VulDB Vector: 🔒
VulDB Reliability: 🔍

NVD Base Score: 7.5
NVD Vector: 🔒

CVSSv2info

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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Use after free
CWE: CWE-416 / CWE-119
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Nessus ID: 300276
Nessus Name: Linux Distros Unpatched Vulnerability : CVE-2026-25954

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: FreeRDP 3.23.0
Patch: 1994e9844212a6dfe0ff12309fef520e888986b5

Timelineinfo

02/09/2026 CVE reserved
02/26/2026 +17 days Advisory disclosed
02/26/2026 +0 days VulDB entry created
05/13/2026 +76 days VulDB entry last update

Sourcesinfo

Product: github.com

Advisory: GHSA-cc88-4j37-mw6j
Status: Confirmed

CVE: CVE-2026-25954 (🔒)
GCVE (CVE): GCVE-0-2026-25954
GCVE (VulDB): GCVE-100-347895
CERT Bund: WID-SEC-2026-0514 - FreeRDP: Mehrere Schwachstellen

Entryinfo

Created: 02/26/2026 01:30
Updated: 05/13/2026 22:29
Changes: 02/26/2026 01:30 (70), 02/26/2026 16:35 (7), 03/01/2026 04:23 (13), 03/03/2026 07:38 (2), 05/13/2026 22:29 (1)
Complete: 🔍
Cache ID: 216::103

Be aware that VulDB is the high quality source for vulnerability data.

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