Vulnerability · Published Nov 3, 2026 · Assigned by VulnCheck
CVE-2026-121388FreeRDP 3.0.0 before 3.32.2 Uncapped Memory Allocation via DRDYNVC DATA_FIRST
Medium 6.5
In plain English
A medium-severity resource allocation without limits in FreeRDP from FreeRDP. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 24% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Official description
FreeRDP from 3.0.0 before 3.32.2 contains an uncontrolled resource allocation vulnerability that allows malicious RDP servers to force large client allocations through the DRDYNVC DATA_FIRST Length field. Attackers can declare lengths up to 4,294,967,295 bytes on running dynamic channels, causing StreamPool_Take to reserve memory before body validation and exhaust client memory.
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-2026-121388 |
| Debian:13 | freerdp3 | no fix listed | DEBIAN-CVE-2026-121388 |
| Debian:14 | freerdp3 | 3.32.2+dfsg-1 | DEBIAN-CVE-2026-121388 |
| Ubuntu:22.04:LTS | freerdp2 | no fix listed | UBUNTU-CVE-2026-121388 |
| Ubuntu:24.04:LTS | freerdp3 | no fix listed | UBUNTU-CVE-2026-121388 |
| Ubuntu:26.04:LTS | freerdp3 | no fix listed | UBUNTU-CVE-2026-121388 |
| Ubuntu:26.10 | freerdp3 | no fix listed | UBUNTU-CVE-2026-121388 |
Affected products (as reported)
Weakness: CWE-770 · 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-rrp5-666j-g6gp) vendor-advisory
- VulnCheck Advisory: FreeRDP 3.0.0 before 3.32.2 Uncapped Memory Allocation via DRDYNVC DATA_FIRST third-party-advisory