CVE-2026-22851
published 2026-01-14CVE-2026-22851: FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to 3.20.1, a race condition between the RDPGFX dynamic virtual channel thread and the…
PriorityP429medium5.9CVSS 3.1
AVNACHPRNUINSUCNINAH
EPSS
0.25%
16.0th percentile
FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to 3.20.1, a race condition between the RDPGFX dynamic virtual channel thread and the SDL render thread leads to a heap use-after-free. Specifically, an escaped pointer to sdl->primary (SDL_Surface) is accessed after it has been freed during RDPGFX ResetGraphics handling. This vulnerability is fixed in 3.20.1.
Affected
3 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| debian | freerdp2 | < freerdp3 3.20.2+dfsg-1 (forky) | freerdp3 3.20.2+dfsg-1 (forky) |
| debian | freerdp3 | < freerdp3 3.20.2+dfsg-1 (forky) | freerdp3 3.20.2+dfsg-1 (forky) |
| freerdp | freerdp | < 3.20.1 | 3.20.1 |
CVSS provenance
nvdv3.15.9MEDIUMCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
nvdv4.06.9MEDIUMCVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/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
osv6.9MEDIUM
vendor_debian6.9MEDIUM
vendor_redhat6.9MEDIUM
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VulDB
FreeRDP up to 3.20.0 SDL_Surface race condition (GHSA-8g87-6pvc-wh99 / EUVD-2026-2677)
vuldb·2026-06-11·CVSS 5.9
CVE-2026-22851 [MEDIUM] FreeRDP up to 3.20.0 SDL_Surface race condition (GHSA-8g87-6pvc-wh99 / EUVD-2026-2677)
A vulnerability, which was classified as critical, has been found in FreeRDP up to 3.20.0. The impacted element is the function SDL_Surface. Performing a manipulation results in race condition.
This vulnerability is cataloged as CVE-2026-22851. It is possible to initiate the attack remotely. There is no exploit available.
It is advisable to upgrade the affected component.
OSV
CVE-2026-22851: FreeRDP is a free implementation of the Remote Desktop Protocol
osv·2026-01-14·CVSS 6.9
CVE-2026-22851 [MEDIUM] CVE-2026-22851: FreeRDP is a free implementation of the Remote Desktop Protocol
FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to 3.20.1, a race condition between the RDPGFX dynamic virtual channel thread and the SDL render thread leads to a heap use-after-free. Specifically, an escaped pointer to sdl->primary (SDL_Surface) is accessed after it has been freed during RDPGFX ResetGraphics handling. This vulnerability is fixed in 3.20.1.
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 RDPGFX ResetGraphics race
vendor_redhat·2026-01-14·CVSS 6.9
CVE-2026-22851 [MEDIUM] CWE-825 freerdp: FreeRDP RDPGFX ResetGraphics race
freerdp: FreeRDP RDPGFX ResetGraphics race
FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to 3.20.1, a race condition between the RDPGFX dynamic virtual channel thread and the SDL render thread leads to a heap use-after-free. Specifically, an escaped pointer to sdl->primary (SDL_Surface) is accessed after it has been freed during RDPGFX ResetGraphics handling. This vulnerability is fixed in 3.20.1.
A data race has been discovered in FreeRDP. This race condition exists between the RDPGFX dynamic virtual channel thread and the SDL render thread and leads to a heap use-after-free. Specifically, an escaped pointer to sdl->primary (SDL_Surface) is accessed after it has been freed during RDPGFX ResetGraphics handling.
Mitigation: Mitigation for this issue is either not
Debian
CVE-2026-22851: freerdp2 - FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to 3.20.1...
vendor_debian·2026·CVSS 6.9
CVE-2026-22851 [MEDIUM] CVE-2026-22851: freerdp2 - FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to 3.20.1...
FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to 3.20.1, a race condition between the RDPGFX dynamic virtual channel thread and the SDL render thread leads to a heap use-after-free. Specifically, an escaped pointer to sdl->primary (SDL_Surface) is accessed after it has been freed during RDPGFX ResetGraphics handling. This vulnerability is fixed in 3.20.1.
Scope: local
bookworm: open
bullseye: open
No detection rules found.
No public exploits indexed.
Wiz
CVE-2026-22851 Impact, Exploitability, and Mitigation Steps | Wiz
blogs_wiz·CVSS 6.9
CVE-2026-22851 [MEDIUM] CVE-2026-22851 Impact, Exploitability, and Mitigation Steps | Wiz
## CVE-2026-22851 :
NixOS vulnerability analysis and mitigation
FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to 3.20.1, a race condition between the RDPGFX dynamic virtual channel thread and the SDL render thread leads to a heap use-after-free. Specifically, an escaped pointer to sdl->primary (SDL_Surface) is accessed after it has been freed during RDPGFX ResetGraphics handling. This vulnerability is fixed in 3.20.1.
Source : NVD
## 6.9
Score
Published January 14, 2026
Severity MEDIUM
CNA Score 6.9
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) 19.4
Exploitation Probability (EPSS) 0.1
Affected packages and libraries
free
Bugzilla
CVE-2026-22851 freerdp2: FreeRDP RDPGFX ResetGraphics race [fedora-42]
bugzilla·2026-01-14·CVSS 6.9
CVE-2026-22851 [MEDIUM] CVE-2026-22851 freerdp2: FreeRDP RDPGFX ResetGraphics race [fedora-42]
CVE-2026-22851 freerdp2: FreeRDP RDPGFX ResetGraphics race [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 currently maintained version, change the 'version'
to a
Bugzilla
CVE-2026-22851 freerdp: FreeRDP RDPGFX ResetGraphics race
bugzilla·2026-01-14·CVSS 5.9
CVE-2026-22851 [MEDIUM] CVE-2026-22851 freerdp: FreeRDP RDPGFX ResetGraphics race
CVE-2026-22851 freerdp: FreeRDP RDPGFX ResetGraphics race
FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to 3.20.1, a race condition between the RDPGFX dynamic virtual channel thread and the SDL render thread leads to a heap use-after-free. Specifically, an escaped pointer to sdl->primary (SDL_Surface) is accessed after it has been freed during RDPGFX ResetGraphics handling. This vulnerability is fixed in 3.20.1.
2026-01-14
Published