Vulnerabilities
Misconfiguration
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CVE Vulnerabilities

CVE-2026-25952

Use After Free

Published: Feb 25, 2026 | Modified: Feb 27, 2026
CVSS 3.x
9.8
CRITICAL
Source:
NVD
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CVSS 2.x
RedHat/V2
RedHat/V3
6.4 MODERATE
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:L/A:H
Ubuntu
MEDIUM
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Additional information
NVDhttps://nvd.nist.gov/vuln/detail/CVE-2026-25952
CWEhttps://cwe.mitre.org/data/definitions/416.html

FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to version 3.23.0, xf_SetWindowMinMaxInfo dereferences a freed xfAppWindow pointer because xf_rail_get_window in xf_rail_server_min_max_info 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.

Weakness

The product reuses or references memory after it has been freed. At some point afterward, the memory may be allocated again and saved in another pointer, while the original pointer references a location somewhere within the new allocation. Any operations using the original pointer are no longer valid because the memory “belongs” to the code that operates on the new pointer.

Affected Software

NameVendorStart VersionEnd Version
FreerdpFreerdp*3.23.0 (excluding)
Red Hat Enterprise Linux 10RedHatfreerdp-2:3.10.3-5.el10_1.8*
Red Hat Enterprise Linux 10RedHatfreerdp-2:3.10.3-12.el10_2.5*
Red Hat Enterprise Linux 10.0 Extended Update SupportRedHatfreerdp-2:3.10.3-3.el10_0.7*
Red Hat Enterprise Linux 7 Extended Lifecycle SupportRedHatfreerdp-0:2.1.1-5.el7_9.9*
Red Hat Enterprise Linux 8RedHatfreerdp-2:2.11.7-9.el8_10*
Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update SupportRedHatfreerdp-2:2.2.0-14.el8_4*
Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-OnRedHatfreerdp-2:2.2.0-14.el8_4*
Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update SupportRedHatfreerdp-2:2.2.0-7.el8_6.8*
Red Hat Enterprise Linux 8.6 Telecommunications Update ServiceRedHatfreerdp-2:2.2.0-7.el8_6.8*
Red Hat Enterprise Linux 8.6 Update Services for SAP SolutionsRedHatfreerdp-2:2.2.0-7.el8_6.8*
Red Hat Enterprise Linux 8.8 Telecommunications Update ServiceRedHatfreerdp-2:2.2.0-12.el8_8.8*
Red Hat Enterprise Linux 8.8 Update Services for SAP SolutionsRedHatfreerdp-2:2.2.0-12.el8_8.8*
Red Hat Enterprise Linux 9RedHatfreerdp-2:2.11.7-1.el9_7.7*
Red Hat Enterprise Linux 9RedHatfreerdp-2:2.11.7-7.el9_8.3*
Red Hat Enterprise Linux 9.0 Update Services for SAP SolutionsRedHatfreerdp-2:2.4.1-3.el9_0.7*
Red Hat Enterprise Linux 9.2 Update Services for SAP SolutionsRedHatfreerdp-2:2.4.1-6.el9_2.9*
Red Hat Enterprise Linux 9.4 Extended Update SupportRedHatfreerdp-2:2.11.2-1.el9_4.8*
Red Hat Enterprise Linux 9.6 Extended Update SupportRedHatfreerdp-2:2.11.7-1.el9_6.10*
FreerdpUbuntuesm-infra/xenial*
Freerdp3Ubuntunoble*
Freerdp3Ubuntuquesting*
Freerdp3Ubuntuupstream*

Potential Mitigations

References

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