CVE-2026-25953
published 2026-02-25CVE-2026-25953: FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to version 3.23.0, `xf_AppUpdateWindowFromSurface` reads from a freed `xfAppWindow`…
PriorityP352critical9.8CVSS 3.1
AVNACLPRNUINSUCHIHAH
EPSS
0.59%
44.5th percentile
FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to version 3.23.0, `xf_AppUpdateWindowFromSurface` reads from a freed `xfAppWindow` because the RDPGFX DVC thread obtains a bare pointer via `xf_rail_get_window` without any lifetime protection, while the main thread can concurrently delete the window through a fastpath window-delete order. Version 3.23.0 fixes the issue.
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
nvdv3.19.8CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
nvdv4.05.5MEDIUMCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
osv5.5MEDIUM
vendor_debian5.5MEDIUM
vendor_redhat5.5MEDIUM
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VulDB
FreeRDP up to 3.22.x xf_AppUpdateWindowFromSurface use after free (GHSA-p6rq-rxpc-rh3p / Nessus ID 300136)
vuldb·2026-05-13·CVSS 5.5
CVE-2026-25953 [MEDIUM] FreeRDP up to 3.22.x xf_AppUpdateWindowFromSurface use after free (GHSA-p6rq-rxpc-rh3p / Nessus ID 300136)
A vulnerability categorized as critical has been discovered in FreeRDP up to 3.22.x. This affects the function xf_AppUpdateWindowFromSurface. Executing a manipulation can lead to use after free.
This vulnerability is handled as CVE-2026-25953. The attack can be executed remotely. There is not any exploit available.
It is advisable to upgrade the affected component.
OSV
CVE-2026-25953: FreeRDP is a free implementation of the Remote Desktop Protocol
osv·2026-02-25·CVSS 5.5
CVE-2026-25953 [MEDIUM] CVE-2026-25953: 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, `xf_AppUpdateWindowFromSurface` reads from a freed `xfAppWindow` because the RDPGFX DVC thread obtains a bare pointer via `xf_rail_get_window` without any lifetime protection, while the main thread can concurrently delete the window through a fastpath window-delete order. Version 3.23.0 fixes the issue.
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 due to use-after-free vulnerability in window handling
vendor_redhat·2026-02-25·CVSS 5.5
CVE-2026-25953 [MEDIUM] CWE-825 freerdp: FreeRDP: Denial of Service due to use-after-free vulnerability in window handling
freerdp: FreeRDP: Denial of Service due to use-after-free vulnerability in window handling
FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to version 3.23.0, `xf_AppUpdateWindowFromSurface` reads from a freed `xfAppWindow` because the RDPGFX DVC thread obtains a bare pointer via `xf_rail_get_window` without any lifetime protection, while the main thread can concurrently delete the window through a fastpath window-delete order. Version 3.23.0 fixes the issue.
A flaw was found in FreeRDP, a free implementation of the Remote Desktop Protocol. This use-after-free vulnerability occurs in the `xf_AppUpdateWindowFromSurface` function where a bare pointer to a window is obtained without proper lifetime protection. A remote attacker could exploit this by concurrently deleti
Debian
CVE-2026-25953: freerdp2 - FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to versio...
vendor_debian·2026·CVSS 5.5
CVE-2026-25953 [MEDIUM] CVE-2026-25953: 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, `xf_AppUpdateWindowFromSurface` reads from a freed `xfAppWindow` because the RDPGFX DVC thread obtains a bare pointer via `xf_rail_get_window` without any lifetime protection, while the main thread can concurrently delete the window through a fastpath window-delete order. Version 3.23.0 fixes the issue.
Scope: local
bookworm: open
bullseye: open
No detection rules found.
No public exploits indexed.
Bugzilla
CVE-2026-25953 freerdp: FreeRDP: Denial of Service due to use-after-free vulnerability in window handling [fedora-42]
bugzilla·2026-02-25·CVSS 5.5
CVE-2026-25953 [MEDIUM] CVE-2026-25953 freerdp: FreeRDP: Denial of Service due to use-after-free vulnerability in window handling [fedora-42]
CVE-2026-25953 freerdp: FreeRDP: Denial of Service due to use-after-free vulnerability in window handling [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-2026-25953 freerdp: FreeRDP: Denial of Service due to use-after-free vulnerability in window handling
bugzilla·2026-02-25·CVSS 9.8
CVE-2026-25953 [CRITICAL] CVE-2026-25953 freerdp: FreeRDP: Denial of Service due to use-after-free vulnerability in window handling
CVE-2026-25953 freerdp: FreeRDP: Denial of Service due to use-after-free vulnerability in window handling
FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to version 3.23.0, `xf_AppUpdateWindowFromSurface` reads from a freed `xfAppWindow` because the RDPGFX DVC thread obtains a bare pointer via `xf_rail_get_window` without any lifetime protection, while the main thread can concurrently delete the window through a fastpath window-delete order. Version 3.23.0 fixes the issue.
Bugzilla
CVE-2026-25953 freerdp2: FreeRDP: Denial of Service due to use-after-free vulnerability in window handling [fedora-42]
bugzilla·2026-02-25·CVSS 5.5
CVE-2026-25953 [MEDIUM] CVE-2026-25953 freerdp2: FreeRDP: Denial of Service due to use-after-free vulnerability in window handling [fedora-42]
CVE-2026-25953 freerdp2: FreeRDP: Denial of Service due to use-after-free vulnerability in window handling [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 currentl
Wiz
CVE-2026-25953 Impact, Exploitability, and Mitigation Steps | Wiz
blogs_wiz·CVSS 5.5
CVE-2026-25953 [MEDIUM] CVE-2026-25953 Impact, Exploitability, and Mitigation Steps | Wiz
## CVE-2026-25953 :
NixOS vulnerability analysis and mitigation
xf_AppUpdateWindowFromSurface
xfAppWindow
xf_rail_get_window
Source : NVD
## 5.5
Score
Published February 25, 2026
Severity MEDIUM
CNA Score 5.5
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) 30.6
Exploitation Probability (EPSS) 0.1
Affected packages and libraries
freerdp-libs
freerdp-libs-debuginfo
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, 3.23, edge Severity CRITICAL Has Fix Added at: Mar 02, 2026
Chainguard Has Fix Added at: Mar 02, 2026
Debian 11, 13 Severity CRITICAL No Fix Added at: Mar 02, 2026
Debian 12 Severity
https://github.com/FreeRDP/FreeRDP/blob/5c7aae27d0417b42b4806c2a5c583ca39dd9ef1e/client/X11/xf_rail.c#L1230-L1237https://github.com/FreeRDP/FreeRDP/blob/5c7aae27d0417b42b4806c2a5c583ca39dd9ef1e/client/X11/xf_rail.c#L257-L290https://github.com/FreeRDP/FreeRDP/blob/5c7aae27d0417b42b4806c2a5c583ca39dd9ef1e/client/X11/xf_rail.c#L643-L647https://github.com/FreeRDP/FreeRDP/blob/5c7aae27d0417b42b4806c2a5c583ca39dd9ef1e/client/X11/xf_window.c#L1394-L1428https://github.com/FreeRDP/FreeRDP/blob/5c7aae27d0417b42b4806c2a5c583ca39dd9ef1e/client/X11/xf_window.c#L1462-L1470https://github.com/FreeRDP/FreeRDP/blob/5c7aae27d0417b42b4806c2a5c583ca39dd9ef1e/client/X11/xf_window.c#L1484-L1491https://github.com/FreeRDP/FreeRDP/blob/5c7aae27d0417b42b4806c2a5c583ca39dd9ef1e/libfreerdp/gdi/gfx.c#L254-L286https://github.com/FreeRDP/FreeRDP/blob/5c7aae27d0417b42b4806c2a5c583ca39dd9ef1e/libfreerdp/gdi/gfx.c#L278-L279https://github.com/FreeRDP/FreeRDP/commit/1994e9844212a6dfe0ff12309fef520e888986b5https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-p6rq-rxpc-rh3phttps://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-p6rq-rxpc-rh3p
2026-02-25
Published