Vulnerability · Published Nov 3, 2026 · Assigned by VulnCheck
CVE-2026-121394FreeRDP before 3.32.2 Denial of Service via RemoteFX RLGR decoder
Medium 6.5
In plain English
A medium-severity security flaw in FreeRDP from FreeRDP. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 17% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS 3.1)6.5Medium
Exploit odds (30 days)0.3%top 83.0% of all CVEs
Exploited in the wildNo reportsCISA SSVC: poc
Attack toolingNoneno public tooling known
Official description
FreeRDP from 3.11.0 before 3.32.2 contains an assertion failure in the RemoteFX RLGR decoder that allows malicious servers to terminate clients. Attackers controlling an RDP server can send a RemoteFX tileset with RLGR code 32767, triggering a signed narrowing assertion in rfx_rlgr_decode and crashing the client.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| AlmaLinux:10 | freerdp | 2:3.32.2-1.el10_2 | ALSA-2026:94514 |
| AlmaLinux:10 | freerdp-devel | 2:3.32.2-1.el10_2 | ALSA-2026:94514 |
| AlmaLinux:10 | freerdp-libs | 2:3.32.2-1.el10_2 | ALSA-2026:94514 |
| AlmaLinux:10 | freerdp-server | 2:3.32.2-1.el10_2 | ALSA-2026:94514 |
| AlmaLinux:10 | libwinpr | 2:3.32.2-1.el10_2 | ALSA-2026:94514 |
| AlmaLinux:10 | libwinpr-devel | 2:3.32.2-1.el10_2 | ALSA-2026:94514 |
| Debian:12 | freerdp2 | no fix listed | DEBIAN-CVE-2026-121394 |
| Debian:13 | freerdp3 | no fix listed | DEBIAN-CVE-2026-121394 |
| Debian:14 | freerdp3 | 3.32.2+dfsg-1 | DEBIAN-CVE-2026-121394 |
| Ubuntu:22.04:LTS | freerdp2 | no fix listed | UBUNTU-CVE-2026-121394 |
| Ubuntu:24.04:LTS | freerdp3 | no fix listed | UBUNTU-CVE-2026-121394 |
| Ubuntu:26.04:LTS | freerdp3 | no fix listed | UBUNTU-CVE-2026-121394 |
| Ubuntu:26.10 | freerdp3 | no fix listed | UBUNTU-CVE-2026-121394 |
Affected products (as reported)
Weakness: CWE-617 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
References
- GitHub Security Advisory (GHSA-5j39-x36c-x9pm) vendor-advisory
- VulnCheck Advisory: FreeRDP before 3.32.2 Denial of Service via RemoteFX RLGR decoder third-party-advisory