CVE-2026-25953
FreeRDP has heap-use-after-free in xf_AppUpdateWindowFromSurface (freed appWindow)
- Published
- Last modified
- Where the record stands: published, rejected by its publisher, or superseded by another id.What do these mean? →
- published
- Whether CISA lists it in its Known Exploited Vulnerabilities catalog: proof that attackers are using it.What do these mean? →
- Not listed in CISA KEV
- Fix
- Fixed in 3.23.0
- Whether working attack code is public (Exploit-DB, Metasploit, Nuclei or GitHub). Public code makes attacks easier.What do these mean? →
- None on Exploit-DB, Metasploit or GitHub
CISA's decision points: whether it is exploited, whether attacks can be automated, and how much control an attacker gets. Assessed (SSVC 2.0.3).What do these mean? →
- Exploitation: poc
- Automatable: yes
- Technical impact: partial
Summary
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.
Timeline
- CVE published
- CISA SSVC assessment
Exploitation: poc · Automatable: yes · Technical impact: partial
- Record last updated
Affected versions
- FreeRDP FreeRDP
fixed in 3.23.0
References 10
GitHub · FreeRDP/FreeRDP
- Advisory GHSA-p6rq-rxpc-rh3p
- Commit 1994e984
- client/X11/xf_rail.c · L1230-L1237
- client/X11/xf_rail.c · L257-L290
- client/X11/xf_rail.c · L643-L647
- client/X11/xf_window.c · L1394-L1428
- client/X11/xf_window.c · L1462-L1470
- client/X11/xf_window.c · L1484-L1491
- libfreerdp/gdi/gfx.c · L254-L286
- libfreerdp/gdi/gfx.c · L278-L279