CVE-2026-109938 FreeRDP 3.11.0 before 3.32.0 Integer Overflow via Mapped Video Geometry Update
A malicious RDP server can crash FreeRDP clients via integer overflow in video geometry updates when video redirection is enabled.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- Available
What is CVE-2026-109938?
CVE-2026-109938 is a high-severity vulnerability in Freerdp Freerdp, published on 13 Oct 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Official description
Positive mapped-video coordinates overflow and abort FreeRDP clients A malicious or compromised RDP server can terminate a FreeRDP client after the user connects with video redirection enabled.
Weakness: CWE-190
Which versions are affected by CVE-2026-109938?
It affects 1 product.
Products include Freerdp Freerdp.
How do I fix CVE-2026-109938?
Upgrade to a fixed version.
Is CVE-2026-109938 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-109938 exists.
Other vulnerabilities in Freerdp Freerdp
- CVE-2021-37594 Other in n/a
- CVE-2021-37595 Other in n/a
- CVE-2026-67305 FreeRDP Windows Client before 3.29.0 Heap Buffer Overflow via Cliprdr
- CVE-2026-66402 FreeRDP before 3.29.0 TLS Certificate Identity Validation Bypass
- CVE-2026-67289 FreeRDP before 3.29.0 HTTP Proxy Request Injection via Redirection
Sources
Also known as DEBIAN-CVE-2026-109938, GHSA-96rv-gf42-7wq9, GHSA-h966-hcrh-5687, UBUNTU-CVE-2026-109938.