Vulnerability · Published Nov 3, 2026 · Assigned by VulnCheck
CVE-2026-121405FreeRDP before 3.32.2 Memory Exhaustion via Serial RDPDR Device Control
Medium 4.3
In plain English
A medium-severity resource allocation without limits 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 21% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Official description
FreeRDP before 3.32.2 fails to cap the OutputBufferLength in serial device-control IRP requests, allowing malicious servers to trigger excessive memory allocation. Attackers running a server with serial redirection can send an IRP_MJ_DEVICE_CONTROL request with IOCTL_USBPRINT_GET_1284_ID and a near-maximum length to exhaust client memory.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:12 | freerdp2 | no fix listed | DEBIAN-CVE-2026-121405 |
| Debian:13 | freerdp3 | no fix listed | DEBIAN-CVE-2026-121405 |
| Debian:14 | freerdp3 | 3.32.2+dfsg-1 | DEBIAN-CVE-2026-121405 |
| Ubuntu:22.04:LTS | freerdp2 | no fix listed | UBUNTU-CVE-2026-121405 |
| Ubuntu:24.04:LTS | freerdp3 | no fix listed | UBUNTU-CVE-2026-121405 |
| Ubuntu:26.04:LTS | freerdp3 | no fix listed | UBUNTU-CVE-2026-121405 |
| Ubuntu:26.10 | freerdp3 | no fix listed | UBUNTU-CVE-2026-121405 |
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:L
References
- GitHub Security Advisory (GHSA-r387-jjq3-87hv) vendor-advisory
- VulnCheck Advisory: FreeRDP before 3.32.2 Memory Exhaustion via Serial RDPDR Device Control third-party-advisory