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NVD Vulnerability Details :
CVE-2026-25955
Analyzed
More InfoOfficial Page
Source-security-advisories@github.com
View Known Exploited Vulnerability (KEV) details
Published At-25 Feb, 2026 | 21:16
Updated At-27 Feb, 2026 | 14:56

FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to version 3.23.0, `xf_AppUpdateWindowFromSurface` reuses a cached `XImage` whose `data` pointer references a freed RDPGFX surface buffer, because `gdi_DeleteSurface` frees `surface->data` without invalidating the `appWindow->image` that aliases it. Version 3.23.0 fixes the issue.

CISA Catalog
Date AddedDue DateVulnerability NameRequired Action
N/A
Date Added: N/A
Due Date: N/A
Vulnerability Name: N/A
Required Action: N/A
Metrics
TypeVersionBase scoreBase severityVector
Secondary4.05.5MEDIUM
CVSS: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
Primary3.19.8CRITICAL
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Type: Secondary
Version: 4.0
Base score: 5.5
Base severity: MEDIUM
Vector:
CVSS: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
Type: Primary
Version: 3.1
Base score: 9.8
Base severity: CRITICAL
Vector:
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CPE Matches
FreeRDP
freerdp
>>freerdp>>Versions before 3.23.0(exclusive)
cpe:2.3:a:freerdp:freerdp:*:*:*:*:*:*:*:*
Weaknesses
CWE IDTypeSource
CWE-416Secondarysecurity-advisories@github.com
CWE ID: CWE-416
Type: Secondary
Source: security-advisories@github.com
Evaluator Description
Evaluator Impact

Evaluator Solution

Vendor Statements
References
HyperlinkSourceResource
https://github.com/FreeRDP/FreeRDP/blob/5c7aae27d0417b42b4806c2a5c583ca39dd9ef1e/client/X11/xf_window.c#L1484-L1492security-advisories@github.com
Patch
https://github.com/FreeRDP/FreeRDP/blob/5c7aae27d0417b42b4806c2a5c583ca39dd9ef1e/client/X11/xf_window.c#L1494-L1500security-advisories@github.com
Patch
https://github.com/FreeRDP/FreeRDP/blob/5c7aae27d0417b42b4806c2a5c583ca39dd9ef1e/client/X11/xf_window.c#L1528security-advisories@github.com
Patch
https://github.com/FreeRDP/FreeRDP/blob/5c7aae27d0417b42b4806c2a5c583ca39dd9ef1e/libfreerdp/gdi/gfx.c#L1224-L1227security-advisories@github.com
Patch
https://github.com/FreeRDP/FreeRDP/commit/169d358734509e82663a0d6a0085ae726d439d8esecurity-advisories@github.com
Patch
https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-4g54-x8v7-559xsecurity-advisories@github.com
Exploit
Mitigation
Patch
Vendor Advisory
https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-4g54-x8v7-559x134c704f-9b21-4f2e-91b3-4a467353bcc0
Exploit
Mitigation
Patch
Vendor Advisory
Hyperlink: https://github.com/FreeRDP/FreeRDP/blob/5c7aae27d0417b42b4806c2a5c583ca39dd9ef1e/client/X11/xf_window.c#L1484-L1492
Source: security-advisories@github.com
Resource:
Patch
Hyperlink: https://github.com/FreeRDP/FreeRDP/blob/5c7aae27d0417b42b4806c2a5c583ca39dd9ef1e/client/X11/xf_window.c#L1494-L1500
Source: security-advisories@github.com
Resource:
Patch
Hyperlink: https://github.com/FreeRDP/FreeRDP/blob/5c7aae27d0417b42b4806c2a5c583ca39dd9ef1e/client/X11/xf_window.c#L1528
Source: security-advisories@github.com
Resource:
Patch
Hyperlink: https://github.com/FreeRDP/FreeRDP/blob/5c7aae27d0417b42b4806c2a5c583ca39dd9ef1e/libfreerdp/gdi/gfx.c#L1224-L1227
Source: security-advisories@github.com
Resource:
Patch
Hyperlink: https://github.com/FreeRDP/FreeRDP/commit/169d358734509e82663a0d6a0085ae726d439d8e
Source: security-advisories@github.com
Resource:
Patch
Hyperlink: https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-4g54-x8v7-559x
Source: security-advisories@github.com
Resource:
Exploit
Mitigation
Patch
Vendor Advisory
Hyperlink: https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-4g54-x8v7-559x
Source: 134c704f-9b21-4f2e-91b3-4a467353bcc0
Resource:
Exploit
Mitigation
Patch
Vendor Advisory
Change History
0Changes found
Details not found