Vulnerability · Published Oct 13, 2026 · Assigned by VulnCheck
CVE-2026-109680FreeRDP 3.18.0 before 3.32.0 Heap Out-of-Bounds Write via ARM Redirected Username
Medium 5.3
In plain English
A medium-severity out-of-bounds write 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 23% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Official description
FreeRDP 3.18.0 before 3.32.0 has a heap-based out-of-bounds write in freerdp_interruptible_get_line, which shrinks the buffer to 32 bytes while keeping a pre-filled suggested username's length as its write offset. A malicious or compromised ARM routing service can return a long redirectedUsername that reaches the CLI credential prompt, crashing the client when the user types input.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:12 | freerdp2 | no fix listed | DEBIAN-CVE-2026-109680 |
| Debian:13 | freerdp3 | no fix listed | DEBIAN-CVE-2026-109680 |
| Debian:14 | freerdp3 | 3.32.0+dfsg-1 | DEBIAN-CVE-2026-109680 |
| Ubuntu:22.04:LTS | freerdp2 | no fix listed | UBUNTU-CVE-2026-109680 |
| Ubuntu:24.04:LTS | freerdp3 | 3.32.0+dfsg-0ubuntu0.24.04.1 | UBUNTU-CVE-2026-109680 |
| Ubuntu:26.04:LTS | freerdp3 | 3.32.0+dfsg-0ubuntu0.26.04.1 | UBUNTU-CVE-2026-109680 |
Affected products (as reported)
Weakness: CWE-787 · Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:N/A:H
References
- GitHub Security Advisory (GHSA-4ww8-3vqm-jgcf) vendor-advisory
- VulnCheck Advisory: FreeRDP 3.18.0 before 3.32.0 Heap Out-of-Bounds Write via ARM Redirected Username third-party-advisory