CVE-2026-111373 FreeRDP before 3.32.0 NULL Dereference via Zero-Length WebSocket Ping
A malicious gateway can crash FreeRDP clients by sending zero-length WebSocket pings, causing a denial of service.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-111373?
CVE-2026-111373 is a medium-severity vulnerability in Freerdp Freerdp, published on 16 Oct 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
FreeRDP before 3.32.0 contains a NULL pointer dereference vulnerability in the websocket transport that allows a malicious gateway to crash clients by sending zero-length pings. When the payload length is zero, websocket_reply_pong passes a nullptr stream to websocket_reply_close, triggering an assertion failure that terminates the client process and causes denial of service.
Weakness: CWE-476
Which versions are affected by CVE-2026-111373?
It affects 1 product.
Products include Freerdp Freerdp.
How do I fix CVE-2026-111373?
Upgrade to a fixed version.
Is CVE-2026-111373 being exploited?
There is no known exploitation of CVE-2026-111373 in the wild and no public exploit code.
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-2026-111373, GHSA-83g2-gf92-5c4g, GHSA-v777-vh94-53m6, UBUNTU-CVE-2026-111373.