Name: CVE-2026-26986: Use After Free
Creator: Rapid7
Published: 2026-02-25T00:00:00.000Z
License: https://www.rapid7.com/legal/website-terms-of-use/
Keywords: CVE, CVE-2026-26986, CVSS 5.5, EPSS 0.00476

FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to version 3.23.0, `rail_window_free` dereferences a freed `xfAppWindow` pointer during `HashTable_Free` cleanup because `xf_rail_window_common` calls `free(appWindow)` on title allocation failure without first removing the entry from the `railWindows` hash table, leaving a dangling pointer that is freed again on disconnect. Version 3.23.0 fixes the vulnerability.

CVSS Details

CVSS 4.0 Base Score: 5.5 (MEDIUM)
CVSS 4.0 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)
CVSS 3.1 Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H)

Covered by Rapid7

Product	Vendor Advisory	Solution File	Added	Published
Alma_linux	—	Upgrade freerdp-develUpgrade freerdpUpgrade libwinpr-develUpgrade libwinprUpgrade freerdp-libs	May 12, 2026	May 11, 2026
Amazon Linux Ami 2	—	Upgrade freerdp-libsUpgrade freerdp-develUpgrade libwinprUpgrade libwinpr-develUpgrade freerdp-debuginfoUpgrade freerdp	May 20, 2026	May 20, 2026
Amazon_linux_2023	—	Upgrade freerdp-debugsourceUpgrade freerdp-debuginfoUpgrade freerdpUpgrade libwinpr-develUpgrade libwinprUpgrade freerdp-libsUpgrade libwinpr-debuginfoUpgrade freerdp-serverUpgrade freerdp-develUpgrade freerdp-server-debuginfoUpgrade freerdp-libs-debuginfo	Apr 7, 2026	Feb 25, 2026
Debian	—	Upgrade freerdp3	Jul 23, 2026	Jul 23, 2026
Oracle_linux	—	Upgrade freerdp-serverUpgrade libwinprUpgrade freerdp-develUpgrade libwinpr-develUpgrade freerdpUpgrade freerdp-libs	May 13, 2026	Feb 25, 2026
Redhat_linux	—	Upgrade libwinpr-develUpgrade freerdpUpgrade freerdp-debuginfoUpgrade freerdp-debugsourceUpgrade libwinprUpgrade freerdp-libs-debuginfoNo solution existsUpgrade freerdp-libsUpgrade freerdp-develUpgrade freerdp-serverUpgrade freerdp-server-debuginfoUpgrade libwinpr-debuginfo	May 12, 2026	Feb 25, 2026
Rocky_linux	—	Upgrade libwinpr-debuginfoUpgrade freerdp-debuginfoUpgrade libwinprUpgrade freerdp-develUpgrade freerdp-server-debuginfoUpgrade freerdp-serverUpgrade freerdpUpgrade freerdp-libsUpgrade libwinpr-develUpgrade freerdp-debugsourceUpgrade freerdp-libs-debuginfo	May 14, 2026	May 13, 2026
Ubuntu	—	Upgrade libfreerdp3-3	Mar 19, 2026	Feb 25, 2026

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CVSS Details

Covered by Rapid7

Prioritize with Active Threat Intelligence