CVE-2026-109680
5.3MediumPublished 13 Oct 2026 · NVD status: Undergoing Analysis · AI triage by gemini-3.8-flash
- Attack vector
- Network
- Complexity
- High
- Privileges needed
- None
- User interaction
- Required
- Impact
- High impact on availability
- Weakness
- CWE-787
Impact
A malicious or compromised ARM routing service can crash the FreeRDP client when a user types into the credential prompt. The attacker needs to control the routing service and trick a user into connecting and entering credentials.
Root cause
The freerdp_interruptible_get_line function shrinks its input buffer to 32 bytes but preserves the length of an oversized suggested username as the write offset, triggering a heap out-of-bounds write.
Affected systems
FreeRDP 3.18.0 before 3.32.0
CVSS v3.1 · CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:N/A:H
Fix & remediation
Upgrade FreeRDP to version 3.32.0 or later. No interim workaround is documented; avoid connecting to untrusted ARM routing services until patched.
$ sudo apt-get update && sudo apt-get install --only-upgrade freerdp3-x11AI-suggested. Run it in staging first and check it against the vendor advisory. Why?
NVD 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.